import BaseHTTPServer, multiprocessing, os, shutil, subprocess, unittest, zlib, webbrowser, time, shlex
from runner import BrowserCore, path_from_root, nonfastcomp
from tools.shared import *

# User can specify an environment variable EMSCRIPTEN_BROWSER to force the browser test suite to
# run using another browser command line than the default system browser.
emscripten_browser = os.environ.get('EMSCRIPTEN_BROWSER')
if emscripten_browser:
  cmd = shlex.split(emscripten_browser)
  def run_in_other_browser(url):
    Popen(cmd + [url])
  webbrowser.open_new = run_in_other_browser

def test_chunked_synchronous_xhr_server(support_byte_ranges, chunkSize, data, checksum):
  class ChunkedServerHandler(BaseHTTPServer.BaseHTTPRequestHandler):
    def sendheaders(s, extra=[], length=len(data)):
      s.send_response(200)
      s.send_header("Content-Length", str(length))
      s.send_header("Access-Control-Allow-Origin", "http://localhost:8888")
      s.send_header("Access-Control-Expose-Headers", "Content-Length, Accept-Ranges")
      s.send_header("Content-type", "application/octet-stream")
      if support_byte_ranges:
        s.send_header("Accept-Ranges", "bytes")
      for i in extra:
        s.send_header(i[0], i[1])
      s.end_headers()

    def do_HEAD(s):
      s.sendheaders()

    def do_OPTIONS(s):
      s.sendheaders([("Access-Control-Allow-Headers", "Range")], 0)

    def do_GET(s):
      if not support_byte_ranges:
        s.sendheaders()
        s.wfile.write(data)
      else:
        (start, end) = s.headers.get("range").split("=")[1].split("-")
        start = int(start)
        end = int(end)
        end = min(len(data)-1, end)
        length = end-start+1
        s.sendheaders([],length)
        s.wfile.write(data[start:end+1])
      s.wfile.close()

  expectedConns = 11
  httpd = BaseHTTPServer.HTTPServer(('localhost', 11111), ChunkedServerHandler)
  for i in range(expectedConns+1):
    httpd.handle_request()

class browser(BrowserCore):
  @staticmethod
  def audio():
    print
    print 'Running the browser audio tests. Make sure to listen to hear the correct results!'
    print
    audio_test_cases = [
      'test_sdl_audio',
      'test_sdl_audio_mix_channels',
      'test_sdl_audio_mix',
      'test_sdl_audio_quickload',
      'test_sdl_audio_beeps',
      'test_openal_playback',
      'test_openal_buffers',
      'test_freealut'
    ]
    return unittest.TestSuite(map(browser, audio_test_cases))

  @classmethod
  def setUpClass(self):
    super(browser, self).setUpClass()
    print
    print 'Running the browser tests. Make sure the browser allows popups from localhost.'
    print

  def test_html(self):
    # test HTML generation.
    self.btest('hello_world_sdl.cpp', reference='htmltest.png',
        message='You should see "hello, world!" and a colored cube.')

  def test_html_source_map(self):
    cpp_file = os.path.join(self.get_dir(), 'src.cpp')
    html_file = os.path.join(self.get_dir(), 'src.html')
    # browsers will try to 'guess' the corresponding original line if a
    # generated line is unmapped, so if we want to make sure that our
    # numbering is correct, we need to provide a couple of 'possible wrong
    # answers'. thus, we add some printf calls so that the cpp file gets
    # multiple mapped lines. in other words, if the program consists of a
    # single 'throw' statement, browsers may just map any thrown exception to
    # that line, because it will be the only mapped line.
    with open(cpp_file, 'w') as f:
      f.write(r'''
      #include <cstdio>

      int main() {
        printf("Starting test\n");
        try {
          throw 42; // line 8
        } catch (int e) { }
        printf("done\n");
        return 0;
      }
      ''')
    # use relative paths when calling emcc, because file:// URIs can only load
    # sourceContent when the maps are relative paths
    try_delete(html_file)
    try_delete(html_file + '.map')
    Popen([PYTHON, EMCC, 'src.cpp', '-o', 'src.html', '-g4'],
        cwd=self.get_dir()).communicate()
    assert os.path.exists(html_file)
    assert os.path.exists(html_file + '.map')
    webbrowser.open_new('file://' + html_file)
    time.sleep(1)
    print '''
If manually bisecting:
  Check that you see src.cpp among the page sources.
  Even better, add a breakpoint, e.g. on the printf, then reload, then step through and see the print (best to run with EM_SAVE_DIR=1 for the reload).
'''

  def test_emscripten_log(self):
    src = os.path.join(self.get_dir(), 'src.cpp')
    open(src, 'w').write(self.with_report_result(open(path_from_root('tests', 'emscripten_log', 'emscripten_log.cpp')).read()))

    Popen([PYTHON, EMCC, src, '--pre-js', path_from_root('src', 'emscripten-source-map.min.js'), '-g', '-o', 'page.html']).communicate()
    self.run_browser('page.html', None, '/report_result?1')
  
  def build_native_lzma(self):
    lzma_native = path_from_root('third_party', 'lzma.js', 'lzma-native')
    if os.path.isfile(lzma_native) and os.access(lzma_native, os.X_OK): return

    cwd = os.getcwd()
    try:
      os.chdir(path_from_root('third_party', 'lzma.js'))
      if WINDOWS and Building.which('mingw32-make'): # On Windows prefer using MinGW make if it exists, otherwise fall back to hoping we have cygwin make.
        Popen(['doit.bat']).communicate()
      else:
        Popen(['sh', './doit.sh']).communicate()
    finally:
      os.chdir(cwd)

  def test_split(self):
    def nfc():
      # test HTML generation.
      self.reftest(path_from_root('tests', 'htmltest.png'))
      output = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_sdl.cpp'), '-o', 'something.js', '--split', '100', '--pre-js', 'reftest.js']).communicate()
      assert os.path.exists(os.path.join(self.get_dir(), 'something.js')), 'must be main js file'
      assert os.path.exists(os.path.join(self.get_dir(), 'something_functions.js')), 'must be functions js file'
      assert os.path.exists(os.path.join(self.get_dir(), 'something.include.html')), 'must be js include file'

      open(os.path.join(self.get_dir(), 'something.html'), 'w').write('''

      <!doctype html>
      <html lang="en-us">
        <head>
          <meta charset="utf-8">
          <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
          <title>Emscripten-Generated Code</title>
          <style>
            .emscripten { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }
            canvas.emscripten { border: 1px solid black; }
            textarea.emscripten { font-family: monospace; width: 80%; }
            div.emscripten { text-align: center; }
          </style>
        </head>
        <body>
          <hr/>
          <div class="emscripten" id="status">Downloading...</div>
          <div class="emscripten">
            <progress value="0" max="100" id="progress" hidden=1></progress>
          </div>
          <canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()"></canvas>
          <hr/>
          <div class="emscripten"><input type="button" value="fullscreen" onclick="Module.requestFullScreen()"></div>
          <hr/>
          <textarea class="emscripten" id="output" rows="8"></textarea>
          <hr>
          <script type='text/javascript'>
            // connect to canvas
            var Module = {
              preRun: [],
              postRun: [],
              print: (function() {
                var element = document.getElementById('output');
                element.value = ''; // clear browser cache
                return function(text) {
                  // These replacements are necessary if you render to raw HTML
                  //text = text.replace(/&/g, "&amp;");
                  //text = text.replace(/</g, "&lt;");
                  //text = text.replace(/>/g, "&gt;");
                  //text = text.replace('\\n', '<br>', 'g');
                  element.value += text + "\\n";
                  element.scrollTop = element.scrollHeight; // focus on bottom
                };
              })(),
              printErr: function(text) {
                if (0) { // XXX disabled for safety typeof dump == 'function') {
                  dump(text + '\\n'); // fast, straight to the real console
                } else {
                  console.log(text);
                }
              },
              canvas: document.getElementById('canvas'),
              setStatus: function(text) {
                if (Module.setStatus.interval) clearInterval(Module.setStatus.interval);
                var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
                var statusElement = document.getElementById('status');
                var progressElement = document.getElementById('progress');
                if (m) {
                  text = m[1];
                  progressElement.value = parseInt(m[2])*100;
                  progressElement.max = parseInt(m[4])*100;
                  progressElement.hidden = false;
                } else {
                  progressElement.value = null;
                  progressElement.max = null;
                  progressElement.hidden = true;
                }
                statusElement.innerHTML = text;
              },
              totalDependencies: 0,
              monitorRunDependencies: function(left) {
                this.totalDependencies = Math.max(this.totalDependencies, left);
                Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
              }
            };
            Module.setStatus('Downloading...');
          </script>''' + open(os.path.join(self.get_dir(), 'something.include.html')).read() + '''
        </body>
      </html>
      ''')

      self.run_browser('something.html', 'You should see "hello, world!" and a colored cube.', '/report_result?0')

    nonfastcomp(nfc)

  def test_split_in_source_filenames(self):
    def nfc():
      self.reftest(path_from_root('tests', 'htmltest.png'))
      output = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_sdl.cpp'), '-o', 'something.js', '-g', '--split', '100', '--pre-js', 'reftest.js']).communicate()
      assert os.path.exists(os.path.join(self.get_dir(), 'something.js')), 'must be main js file'
      assert os.path.exists(os.path.join(self.get_dir(), 'something', 'hello_world_sdl.cpp.js')), 'must be functions js file'
      assert os.path.exists(os.path.join(self.get_dir(), 'something.include.html')), 'must be js include file'

      open(os.path.join(self.get_dir(), 'something.html'), 'w').write('''

      <!doctype html>
      <html lang="en-us">
        <head>
          <meta charset="utf-8">
          <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
          <title>Emscripten-Generated Code</title>
          <style>
            .emscripten { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }
            canvas.emscripten { border: 1px solid black; }
            textarea.emscripten { font-family: monospace; width: 80%; }
            div.emscripten { text-align: center; }
          </style>
        </head>
        <body>
          <hr/>
          <div class="emscripten" id="status">Downloading...</div>
          <div class="emscripten">
            <progress value="0" max="100" id="progress" hidden=1></progress>
          </div>
          <canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()"></canvas>
          <hr/>
          <div class="emscripten"><input type="button" value="fullscreen" onclick="Module.requestFullScreen()"></div>
          <hr/>
          <textarea class="emscripten" id="output" rows="8"></textarea>
          <hr>
          <script type='text/javascript'>
            // connect to canvas
            var Module = {
              preRun: [],
              postRun: [],
              print: (function() {
                var element = document.getElementById('output');
                element.value = ''; // clear browser cache
                return function(text) {
                  // These replacements are necessary if you render to raw HTML
                  //text = text.replace(/&/g, "&amp;");
                  //text = text.replace(/</g, "&lt;");
                  //text = text.replace(/>/g, "&gt;");
                  //text = text.replace('\\n', '<br>', 'g');
                  element.value += text + "\\n";
                  element.scrollTop = element.scrollHeight; // focus on bottom
                };
              })(),
              printErr: function(text) {
                if (0) { // XXX disabled for safety typeof dump == 'function') {
                  dump(text + '\\n'); // fast, straight to the real console
                } else {
                  console.log(text);
                }
              },
              canvas: document.getElementById('canvas'),
              setStatus: function(text) {
                if (Module.setStatus.interval) clearInterval(Module.setStatus.interval);
                var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
                var statusElement = document.getElementById('status');
                var progressElement = document.getElementById('progress');
                if (m) {
                  text = m[1];
                  progressElement.value = parseInt(m[2])*100;
                  progressElement.max = parseInt(m[4])*100;
                  progressElement.hidden = false;
                } else {
                  progressElement.value = null;
                  progressElement.max = null;
                  progressElement.hidden = true;
                }
                statusElement.innerHTML = text;
              },
              totalDependencies: 0,
              monitorRunDependencies: function(left) {
                this.totalDependencies = Math.max(this.totalDependencies, left);
                Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
              }
            };
            Module.setStatus('Downloading...');
          </script>''' + open(os.path.join(self.get_dir(), 'something.include.html')).read() + '''
        </body>
      </html>
      ''')

      self.run_browser('something.html', 'You should see "hello, world!" and a colored cube.', '/report_result?0')

    nonfastcomp(nfc)

  def test_compression(self):
    open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
      #include <stdio.h>
      #include <emscripten.h>
      int main() {
        printf("hello compressed world\n");
        int result = 1;
        REPORT_RESULT();
        return 0;
      }
    '''))

    self.build_native_lzma()
    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '-o', 'page.html',
           '--compression', '%s,%s,%s' % (path_from_root('third_party', 'lzma.js', 'lzma-native'),
                                          path_from_root('third_party', 'lzma.js', 'lzma-decoder.js'),
                                          'LZMA.decompress')]).communicate()
    assert os.path.exists(os.path.join(self.get_dir(), 'page.js')), 'must be side js'
    assert os.path.exists(os.path.join(self.get_dir(), 'page.js.compress')), 'must be side compressed js'
    assert os.stat(os.path.join(self.get_dir(), 'page.js')).st_size > os.stat(os.path.join(self.get_dir(), 'page.js.compress')).st_size, 'compressed file must be smaller'
    shutil.move(os.path.join(self.get_dir(), 'page.js'), 'page.js.renamedsoitcannotbefound');
    self.run_browser('page.html', '', '/report_result?1')

  def test_preload_file(self):
    absolute_src_path = os.path.join(self.get_dir(), 'somefile.txt').replace('\\', '/')
    open(absolute_src_path, 'w').write('''load me right before running the code please''')

    absolute_src_path2 = os.path.join(self.get_dir(), '.somefile.txt').replace('\\', '/')
    open(absolute_src_path2, 'w').write('''load me right before running the code please''')
    
    def make_main(path):
      print 'make main at', path
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
        #include <stdio.h>
        #include <string.h>
        #include <emscripten.h>
        int main() {
          FILE *f = fopen("%s", "r");
          char buf[100];
          fread(buf, 1, 20, f);
          buf[20] = 0;
          fclose(f);
          printf("|%%s|\n", buf);

          int result = !strcmp("load me right before", buf);
          REPORT_RESULT();
          return 0;
        }
        ''' % path))

    test_cases = [
     # (source preload-file string, file on target FS to load)
      ("somefile.txt", "somefile.txt"),
      (".somefile.txt@somefile.txt", "somefile.txt"),
      ("./somefile.txt", "somefile.txt"),
      ("somefile.txt@file.txt", "file.txt"),
      ("./somefile.txt@file.txt", "file.txt"),
      ("./somefile.txt@./file.txt", "file.txt"),
      ("somefile.txt@/file.txt", "file.txt"),
      ("somefile.txt@/", "somefile.txt"), 
      (absolute_src_path + "@file.txt", "file.txt"),
      (absolute_src_path + "@/file.txt", "file.txt"),
      (absolute_src_path + "@/", "somefile.txt"),
      ("somefile.txt@/directory/file.txt", "/directory/file.txt"),
      ("somefile.txt@/directory/file.txt", "directory/file.txt"),
      (absolute_src_path + "@/directory/file.txt", "directory/file.txt")]

    for test in test_cases:
      (srcpath, dstpath) = test
      print 'Testing', srcpath, dstpath
      make_main(dstpath)
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', srcpath, '-o', 'page.html']).communicate()
      self.run_browser('page.html', 'You should see |load me right before|.', '/report_result?1')

    # Test that '--no-heap-copy' works.
    make_main('somefile.txt')
    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', 'somefile.txt', '--no-heap-copy', '-o', 'page.html']).communicate()
    self.run_browser('page.html', 'You should see |load me right before|.', '/report_result?1')

    # By absolute path

    make_main('somefile.txt') # absolute becomes relative
    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', absolute_src_path, '-o', 'page.html']).communicate()
    self.run_browser('page.html', 'You should see |load me right before|.', '/report_result?1')

    # Test subdirectory handling with asset packaging.
    try_delete(self.in_dir('assets'))
    os.makedirs(os.path.join(self.get_dir(), 'assets/sub/asset1/').replace('\\', '/'))
    os.makedirs(os.path.join(self.get_dir(), 'assets/sub/asset1/.git').replace('\\', '/')) # Test adding directory that shouldn't exist.
    os.makedirs(os.path.join(self.get_dir(), 'assets/sub/asset2/').replace('\\', '/'))
    open(os.path.join(self.get_dir(), 'assets/sub/asset1/file1.txt'), 'w').write('''load me right before running the code please''')
    open(os.path.join(self.get_dir(), 'assets/sub/asset1/.git/shouldnt_be_embedded.txt'), 'w').write('''this file should not get embedded''')
    open(os.path.join(self.get_dir(), 'assets/sub/asset2/file2.txt'), 'w').write('''load me right before running the code please''')
    absolute_assets_src_path = os.path.join(self.get_dir(), 'assets').replace('\\', '/')
    def make_main_two_files(path1, path2, nonexistingpath):
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
        #include <stdio.h>
        #include <string.h>
        #include <emscripten.h>
        int main() {
          FILE *f = fopen("%s", "r");
          char buf[100];
          fread(buf, 1, 20, f);
          buf[20] = 0;
          fclose(f);
          printf("|%%s|\n", buf);

          int result = !strcmp("load me right before", buf);
          
          f = fopen("%s", "r");
          if (f == NULL)
            result = 0;
          fclose(f);
          
          f = fopen("%s", "r");
          if (f != NULL)
            result = 0;

          REPORT_RESULT();
          return 0;
        }
      ''' % (path1, path2, nonexistingpath)))

    test_cases = [
     # (source directory to embed, file1 on target FS to load, file2 on target FS to load, name of a file that *shouldn't* exist on VFS)
      ("assets", "assets/sub/asset1/file1.txt", "assets/sub/asset2/file2.txt", "assets/sub/asset1/.git/shouldnt_be_embedded.txt"),
      ("assets/", "assets/sub/asset1/file1.txt", "assets/sub/asset2/file2.txt", "assets/sub/asset1/.git/shouldnt_be_embedded.txt"),
      ("assets@/", "/sub/asset1/file1.txt", "/sub/asset2/file2.txt", "/sub/asset1/.git/shouldnt_be_embedded.txt"),
      ("assets/@/", "/sub/asset1/file1.txt", "/sub/asset2/file2.txt", "/sub/asset1/.git/shouldnt_be_embedded.txt"),
      ("assets@./", "/sub/asset1/file1.txt", "/sub/asset2/file2.txt", "/sub/asset1/.git/shouldnt_be_embedded.txt"),
      (absolute_assets_src_path + "@/", "/sub/asset1/file1.txt", "/sub/asset2/file2.txt", "/sub/asset1/.git/shouldnt_be_embedded.txt"),
      (absolute_assets_src_path + "@/assets", "/assets/sub/asset1/file1.txt", "/assets/sub/asset2/file2.txt", "assets/sub/asset1/.git/shouldnt_be_embedded.txt")]

    for test in test_cases:
      (srcpath, dstpath1, dstpath2, nonexistingpath) = test
      make_main_two_files(dstpath1, dstpath2, nonexistingpath)
      print srcpath
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', srcpath, '--exclude-file', '*/.*', '-o', 'page.html']).communicate()
      self.run_browser('page.html', 'You should see |load me right before|.', '/report_result?1')
      
    # Should still work with -o subdir/..

    make_main('somefile.txt') # absolute becomes relative
    try:
      os.mkdir(os.path.join(self.get_dir(), 'dirrey'))
    except:
      pass
    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', absolute_src_path, '-o', 'dirrey/page.html']).communicate()
    self.run_browser('dirrey/page.html', 'You should see |load me right before|.', '/report_result?1')

    # With FS.preloadFile

    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      Module.preRun = function() {
        FS.createPreloadedFile('/', 'someotherfile.txt', 'somefile.txt', true, false);
      };
    ''')
    make_main('someotherfile.txt')
    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--pre-js', 'pre.js', '-o', 'page.html']).communicate()
    self.run_browser('page.html', 'You should see |load me right before|.', '/report_result?1')

  def test_preload_caching(self):
    open(os.path.join(self.get_dir(), 'somefile.txt'), 'w').write('''load me right before running the code please''')
    def make_main(path):
      print path
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
        #include <stdio.h>
        #include <string.h>
        #include <emscripten.h>

        extern "C" {
          extern int checkPreloadResults();
        }

        int main(int argc, char** argv) {
          FILE *f = fopen("%s", "r");
          char buf[100];
          fread(buf, 1, 20, f);
          buf[20] = 0;
          fclose(f);
          printf("|%%s|\n", buf);

          int result = 0;

          result += !strcmp("load me right before", buf);
          result += checkPreloadResults();

          REPORT_RESULT();
          return 0;
        }
      ''' % path))

    open(os.path.join(self.get_dir(), 'test.js'), 'w').write('''
      mergeInto(LibraryManager.library, {
        checkPreloadResults: function() {
          var cached = 0;
          var packages = Object.keys(Module['preloadResults']);
          packages.forEach(function(package) {
            var fromCache = Module['preloadResults'][package]['fromCache'];
            if (fromCache)
              ++ cached;
          });
          return cached;
        }
      });
    ''')

    make_main('somefile.txt')
    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--use-preload-cache', '--js-library', os.path.join(self.get_dir(), 'test.js'), '--preload-file', 'somefile.txt', '-o', 'page.html']).communicate()
    self.run_browser('page.html', 'You should see |load me right before|.', '/report_result?1')
    self.run_browser('page.html', 'You should see |load me right before|.', '/report_result?2')

  def test_multifile(self):
    # a few files inside a directory
    self.clear()
    os.makedirs(os.path.join(self.get_dir(), 'subdirr'));
    os.makedirs(os.path.join(self.get_dir(), 'subdirr', 'moar'));
    open(os.path.join(self.get_dir(), 'subdirr', 'data1.txt'), 'w').write('''1214141516171819''')
    open(os.path.join(self.get_dir(), 'subdirr', 'moar', 'data2.txt'), 'w').write('''3.14159265358979''')
    open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
      #include <stdio.h>
      #include <string.h>
      #include <emscripten.h>
      int main() {
        char buf[17];

        FILE *f = fopen("subdirr/data1.txt", "r");
        fread(buf, 1, 16, f);
        buf[16] = 0;
        fclose(f);
        printf("|%s|\n", buf);
        int result = !strcmp("1214141516171819", buf);

        FILE *f2 = fopen("subdirr/moar/data2.txt", "r");
        fread(buf, 1, 16, f2);
        buf[16] = 0;
        fclose(f2);
        printf("|%s|\n", buf);
        result = result && !strcmp("3.14159265358979", buf);

        REPORT_RESULT();
        return 0;
      }
    '''))

    # by individual files
    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', 'subdirr/data1.txt', '--preload-file', 'subdirr/moar/data2.txt', '-o', 'page.html']).communicate()
    self.run_browser('page.html', 'You should see two cool numbers', '/report_result?1')
    os.remove('page.html')

    # by directory, and remove files to make sure
    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', 'subdirr', '-o', 'page.html']).communicate()
    shutil.rmtree(os.path.join(self.get_dir(), 'subdirr'))
    self.run_browser('page.html', 'You should see two cool numbers', '/report_result?1')

  def test_custom_file_package_url(self):
    # a few files inside a directory
    self.clear()
    os.makedirs(os.path.join(self.get_dir(), 'subdirr'));
    os.makedirs(os.path.join(self.get_dir(), 'cdn'));
    open(os.path.join(self.get_dir(), 'subdirr', 'data1.txt'), 'w').write('''1214141516171819''')
    # change the file package base dir to look in a "cdn". note that normally you would add this in your own custom html file etc., and not by
    # modifying the existing shell in this manner
    open(self.in_dir('shell.html'), 'w').write(open(path_from_root('src', 'shell.html')).read().replace('var Module = {', 'var Module = { filePackagePrefixURL: "cdn/", '))
    open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
      #include <stdio.h>
      #include <string.h>
      #include <emscripten.h>
      int main() {
        char buf[17];

        FILE *f = fopen("subdirr/data1.txt", "r");
        fread(buf, 1, 16, f);
        buf[16] = 0;
        fclose(f);
        printf("|%s|\n", buf);
        int result = !strcmp("1214141516171819", buf);

        REPORT_RESULT();
        return 0;
      }
    '''))

    def test():
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--shell-file', 'shell.html', '--preload-file', 'subdirr/data1.txt', '-o', 'test.html']).communicate()
      shutil.move('test.data', os.path.join('cdn', 'test.data'))
      self.run_browser('test.html', '', '/report_result?1')

    test()

    # TODO: CORS, test using a full url for filePackagePrefixURL
    #open(self.in_dir('shell.html'), 'w').write(open(path_from_root('src', 'shell.html')).read().replace('var Module = {', 'var Module = { filePackagePrefixURL: "http:/localhost:8888/cdn/", '))
    #test()

  def test_compressed_file(self):
    open(os.path.join(self.get_dir(), 'datafile.txt'), 'w').write('compress this please' + (2000*'.'))
    open(os.path.join(self.get_dir(), 'datafile2.txt'), 'w').write('moar' + (100*'!'))
    open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
      #include <stdio.h>
      #include <string.h>
      #include <emscripten.h>
      int main() {
        char buf[21];
        FILE *f = fopen("datafile.txt", "r");
        fread(buf, 1, 20, f);
        buf[20] = 0;
        fclose(f);
        printf("file says: |%s|\n", buf);
        int result = !strcmp("compress this please", buf);
        FILE *f2 = fopen("datafile2.txt", "r");
        fread(buf, 1, 5, f2);
        buf[5] = 0;
        fclose(f2);
        result = result && !strcmp("moar!", buf);
        printf("file 2 says: |%s|\n", buf);
        REPORT_RESULT();
        return 0;
      }
    '''))

    self.build_native_lzma()
    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '-o', 'page.html', '--preload-file', 'datafile.txt', '--preload-file', 'datafile2.txt',
           '--compression', '%s,%s,%s' % (path_from_root('third_party', 'lzma.js', 'lzma-native'),
                                          path_from_root('third_party', 'lzma.js', 'lzma-decoder.js'),
                                          'LZMA.decompress')]).communicate()
    assert os.path.exists(os.path.join(self.get_dir(), 'datafile.txt')), 'must be data file'
    assert os.path.exists(os.path.join(self.get_dir(), 'page.data.compress')), 'must be data file in compressed form'
    assert os.stat(os.path.join(self.get_dir(), 'page.js')).st_size != os.stat(os.path.join(self.get_dir(), 'page.js.compress')).st_size, 'compressed file must be different'
    shutil.move(os.path.join(self.get_dir(), 'datafile.txt'), 'datafile.txt.renamedsoitcannotbefound');
    self.run_browser('page.html', '', '/report_result?1')

  def test_sdl_swsurface(self):
    self.btest('sdl_swsurface.c', expected='1')

  def test_sdl_image(self):
    # load an image file, get pixel data. Also O2 coverage for --preload-file, and memory-init
    shutil.copyfile(path_from_root('tests', 'screenshot.jpg'), os.path.join(self.get_dir(), 'screenshot.jpg'))
    open(os.path.join(self.get_dir(), 'sdl_image.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_image.c')).read()))

    for mem in [0, 1]:
      for dest, dirname, basename in [('screenshot.jpg',                        '/',       'screenshot.jpg'),
                                      ('screenshot.jpg@/assets/screenshot.jpg', '/assets', 'screenshot.jpg')]:
        Popen([
          PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_image.c'), '-o', 'page.html', '-O2', '--memory-init-file', str(mem),
          '--preload-file', dest, '-DSCREENSHOT_DIRNAME="' + dirname + '"', '-DSCREENSHOT_BASENAME="' + basename + '"'
        ]).communicate()
        self.run_browser('page.html', '', '/report_result?600')

  def test_sdl_image_jpeg(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.jpg'), os.path.join(self.get_dir(), 'screenshot.jpeg'))
    open(os.path.join(self.get_dir(), 'sdl_image_jpeg.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_image.c')).read()))
    Popen([
      PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_image_jpeg.c'), '-o', 'page.html',
      '--preload-file', 'screenshot.jpeg', '-DSCREENSHOT_DIRNAME="/"', '-DSCREENSHOT_BASENAME="screenshot.jpeg"'
    ]).communicate()
    self.run_browser('page.html', '', '/report_result?600')

  def test_sdl_image_compressed(self):
    for image, width in [(path_from_root('tests', 'screenshot2.png'), 300),
                         (path_from_root('tests', 'screenshot.jpg'), 600)]:
      self.clear()
      print image

      basename = os.path.basename(image)
      shutil.copyfile(image, os.path.join(self.get_dir(), basename))
      open(os.path.join(self.get_dir(), 'sdl_image.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_image.c')).read()))

      self.build_native_lzma()
      Popen([
        PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_image.c'), '-o', 'page.html',
        '--preload-file', basename, '-DSCREENSHOT_DIRNAME="/"', '-DSCREENSHOT_BASENAME="' + basename + '"',
        '--compression', '%s,%s,%s' % (path_from_root('third_party', 'lzma.js', 'lzma-native'),
                                       path_from_root('third_party', 'lzma.js', 'lzma-decoder.js'),
                                       'LZMA.decompress')
      ]).communicate()
      shutil.move(os.path.join(self.get_dir(), basename), basename + '.renamedsoitcannotbefound');
      self.run_browser('page.html', '', '/report_result?' + str(width))

  def test_sdl_image_prepare(self):
    # load an image file, get pixel data.
    shutil.copyfile(path_from_root('tests', 'screenshot.jpg'), os.path.join(self.get_dir(), 'screenshot.not'))
    self.btest('sdl_image_prepare.c', reference='screenshot.jpg', args=['--preload-file', 'screenshot.not'])

  def test_sdl_image_prepare_data(self):
    # load an image file, get pixel data.
    shutil.copyfile(path_from_root('tests', 'screenshot.jpg'), os.path.join(self.get_dir(), 'screenshot.not'))
    self.btest('sdl_image_prepare_data.c', reference='screenshot.jpg', args=['--preload-file', 'screenshot.not'])

  def test_sdl_stb_image(self):
    # load an image file, get pixel data.
    shutil.copyfile(path_from_root('tests', 'screenshot.jpg'), os.path.join(self.get_dir(), 'screenshot.not'))
    self.btest('sdl_stb_image.c', reference='screenshot.jpg', args=['-s', 'STB_IMAGE=1', '--preload-file', 'screenshot.not'])

  def test_sdl_stb_image_data(self):
    # load an image file, get pixel data.
    shutil.copyfile(path_from_root('tests', 'screenshot.jpg'), os.path.join(self.get_dir(), 'screenshot.not'))
    self.btest('sdl_stb_image_data.c', reference='screenshot.jpg', args=['-s', 'STB_IMAGE=1', '--preload-file', 'screenshot.not'])

  def test_sdl_canvas(self):
    self.clear()
    self.btest('sdl_canvas.c', expected='1', args=['-s', 'LEGACY_GL_EMULATION=1'])
    # some extra coverage
    self.clear()
    self.btest('sdl_canvas.c', expected='1', args=['-s', 'LEGACY_GL_EMULATION=1', '-s', '-O0', '-s', 'SAFE_HEAP=1'])
    self.clear()
    self.btest('sdl_canvas.c', expected='1', args=['-s', 'LEGACY_GL_EMULATION=1', '-s', '-O2', '-s', 'SAFE_HEAP=1'])

  def test_sdl_canvas_proxy(self):
    def post():
      html = open('test.html').read()
      html = html.replace('</body>', '''
<script>
function assert(x, y) { if (!x) throw 'assertion failed ' + y }

%s

var windowClose = window.close;
window.close = function() {
  // wait for rafs to arrive and the screen to update before reftesting
  setTimeout(function() {
    doReftest();
    setTimeout(windowClose, 1000);
  }, 1000);
};
</script>
</body>''' % open('reftest.js').read())
      open('test.html', 'w').write(html)

    open('data.txt', 'w').write('datum')

    self.btest('sdl_canvas_proxy.c', reference='sdl_canvas_proxy.png', args=['--proxy-to-worker', '--preload-file', 'data.txt'], manual_reference=True, post_build=post)

  def test_sdl_canvas_alpha(self):
    self.btest('sdl_canvas_alpha.c', reference='sdl_canvas_alpha.png', reference_slack=9)

  def test_sdl_key(self):
    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      Module.postRun = function() {
        function doOne() {
          Module._one();
          setTimeout(doOne, 1000/60);
        }
        setTimeout(doOne, 1000/60);
      }

      function keydown(c) {
        var event = document.createEvent("KeyboardEvent");
        event.initKeyEvent("keydown", true, true, window,
                           0, 0, 0, 0,
                           c, c);
        document.dispatchEvent(event);
      }

      function keyup(c) {
        var event = document.createEvent("KeyboardEvent");
        event.initKeyEvent("keyup", true, true, window,
                           0, 0, 0, 0,
                           c, c);
        document.dispatchEvent(event);
      }
    ''')
    open(os.path.join(self.get_dir(), 'sdl_key.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_key.c')).read()))

    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_key.c'), '-o', 'page.html', '--pre-js', 'pre.js', '-s', '''EXPORTED_FUNCTIONS=['_main', '_one']''', '-s', 'NO_EXIT_RUNTIME=1']).communicate()
    self.run_browser('page.html', '', '/report_result?223092870')

  def test_sdl_key_proxy(self):
    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      var Module = {};
      Module.postRun = function() {
        function doOne() {
          Module._one();
          setTimeout(doOne, 1000/60);
        }
        setTimeout(doOne, 1000/60);
      }
    ''')

    def post():
      html = open('test.html').read()
      html = html.replace('</body>', '''
<script>
function keydown(c) {
  var event = document.createEvent("KeyboardEvent");
  event.initKeyEvent("keydown", true, true, window,
                     0, 0, 0, 0,
                     c, c);
  document.dispatchEvent(event);
}

function keyup(c) {
  var event = document.createEvent("KeyboardEvent");
  event.initKeyEvent("keyup", true, true, window,
                     0, 0, 0, 0,
                     c, c);
  document.dispatchEvent(event);
}

keydown(1250);keydown(38);keyup(38);keyup(1250); // alt, up
keydown(1248);keydown(1249);keydown(40);keyup(40);keyup(1249);keyup(1248); // ctrl, shift, down
keydown(37);keyup(37); // left
keydown(39);keyup(39); // right
keydown(65);keyup(65); // a
keydown(66);keyup(66); // b
keydown(100);keyup(100); // trigger the end

</script>
</body>''')
      open('test.html', 'w').write(html)

    self.btest('sdl_key_proxy.c', '223092870', args=['--proxy-to-worker', '--pre-js', 'pre.js', '-s', '''EXPORTED_FUNCTIONS=['_main', '_one']''', '-s', 'NO_EXIT_RUNTIME=1'], manual_reference=True, post_build=post)

  def test_sdl_text(self):
    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      Module.postRun = function() {
        function doOne() {
          Module._one();
          setTimeout(doOne, 1000/60);
        }
        setTimeout(doOne, 1000/60);
      }

      function simulateKeyEvent(charCode) {
        var event = document.createEvent("KeyboardEvent");
        event.initKeyEvent("keypress", true, true, window,
                           0, 0, 0, 0, 0, charCode);
        document.body.dispatchEvent(event);
      }
    ''')
    open(os.path.join(self.get_dir(), 'sdl_text.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_text.c')).read()))

    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_text.c'), '-o', 'page.html', '--pre-js', 'pre.js', '-s', '''EXPORTED_FUNCTIONS=['_main', '_one']''']).communicate()
    self.run_browser('page.html', '', '/report_result?1')

  def test_sdl_mouse(self):
    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      function simulateMouseEvent(x, y, button) {
        var event = document.createEvent("MouseEvents");
        if (button >= 0) {
          var event1 = document.createEvent("MouseEvents");
          event1.initMouseEvent('mousedown', true, true, window,
                     1, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y,
                     0, 0, 0, 0,
                     button, null);
          Module['canvas'].dispatchEvent(event1);
          var event2 = document.createEvent("MouseEvents");
          event2.initMouseEvent('mouseup', true, true, window,
                     1, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y,
                     0, 0, 0, 0,
                     button, null);
          Module['canvas'].dispatchEvent(event2);
        } else {
          var event1 = document.createEvent("MouseEvents");
          event1.initMouseEvent('mousemove', true, true, window,
                     0, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y,
                     0, 0, 0, 0,
                     0, null);
          Module['canvas'].dispatchEvent(event1);
        }
      }
      window['simulateMouseEvent'] = simulateMouseEvent;
    ''')
    open(os.path.join(self.get_dir(), 'sdl_mouse.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_mouse.c')).read()))

    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_mouse.c'), '-O2', '--minify', '0', '-o', 'page.html', '--pre-js', 'pre.js']).communicate()
    self.run_browser('page.html', '', '/report_result?740')

  def test_sdl_mouse_offsets(self):
    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      function simulateMouseEvent(x, y, button) {
        var event = document.createEvent("MouseEvents");
        if (button >= 0) {
          var event1 = document.createEvent("MouseEvents");
          event1.initMouseEvent('mousedown', true, true, window,
                     1, x, y, x, y,
                     0, 0, 0, 0,
                     button, null);
          Module['canvas'].dispatchEvent(event1);
          var event2 = document.createEvent("MouseEvents");
          event2.initMouseEvent('mouseup', true, true, window,
                     1, x, y, x, y,
                     0, 0, 0, 0,
                     button, null);
          Module['canvas'].dispatchEvent(event2);
        } else {
          var event1 = document.createEvent("MouseEvents");
          event1.initMouseEvent('mousemove', true, true, window,
                     0, x, y, x, y,
                     0, 0, 0, 0,
                     0, null);
          Module['canvas'].dispatchEvent(event1);
        }
      }
      window['simulateMouseEvent'] = simulateMouseEvent;
    ''')
    open(os.path.join(self.get_dir(), 'page.html'), 'w').write('''
      <html>
        <head>
          <style type="text/css">
            html, body { margin: 0; padding: 0; }
            #container {
              position: absolute;
              left: 5px; right: 0;
              top: 5px; bottom: 0;
            }
            #canvas {
              position: absolute;
              left: 0; width: 600px;
              top: 0; height: 450px;
            }
            textarea {
              margin-top: 500px;
              margin-left: 5px;
              width: 600px;
            }
          </style>
        </head>
        <body>
          <div id="container">
            <canvas id="canvas"></canvas>
          </div>
          <textarea id="output" rows="8"></textarea>
          <script type="text/javascript">
            var Module = {
              canvas: document.getElementById('canvas'),
              print: (function() {
                var element = document.getElementById('output');
                element.value = ''; // clear browser cache
                return function(text) {
                  text = Array.prototype.slice.call(arguments).join(' ');
                  element.value += text + "\\n";
                  element.scrollTop = element.scrollHeight; // focus on bottom
                };
              })()
            };
          </script>
          <script type="text/javascript" src="sdl_mouse.js"></script>
        </body>
      </html>
    ''')
    open(os.path.join(self.get_dir(), 'sdl_mouse.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_mouse.c')).read()))

    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_mouse.c'), '-O2', '--minify', '0', '-o', 'sdl_mouse.js', '--pre-js', 'pre.js']).communicate()
    self.run_browser('page.html', '', '/report_result?600')

  def test_glut_touchevents(self):
    self.btest('glut_touchevents.c', '1')

  def test_glut_wheelevents(self):
    self.btest('glut_wheelevents.c', '1')

  def test_sdl_joystick_1(self):
    # Generates events corresponding to the Working Draft of the HTML5 Gamepad API.
    # http://www.w3.org/TR/2012/WD-gamepad-20120529/#gamepad-interface
    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      var gamepads = [];
      // Spoof this function.
      navigator['getGamepads'] = function() {
        return gamepads;
      };
      window['addNewGamepad'] = function(id, numAxes, numButtons) {
        var index = gamepads.length;
        gamepads.push({
          axes: new Array(numAxes),
          buttons: new Array(numButtons),
          id: id,
          index: index
        });
        var i;
        for (i = 0; i < numAxes; i++) gamepads[index].axes[i] = 0;
        for (i = 0; i < numButtons; i++) gamepads[index].buttons[i] = 0;
      };
      window['simulateGamepadButtonDown'] = function (index, button) {
        gamepads[index].buttons[button] = 1;
      };
      window['simulateGamepadButtonUp'] = function (index, button) {
        gamepads[index].buttons[button] = 0;
      };
      window['simulateAxisMotion'] = function (index, axis, value) {
        gamepads[index].axes[axis] = value;
      };
    ''')
    open(os.path.join(self.get_dir(), 'sdl_joystick.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_joystick.c')).read()))

    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_joystick.c'), '-O2', '--minify', '0', '-o', 'page.html', '--pre-js', 'pre.js']).communicate()
    self.run_browser('page.html', '', '/report_result?2')

  def test_sdl_joystick_2(self):
    # Generates events corresponding to the Editor's Draft of the HTML5 Gamepad API.
    # https://dvcs.w3.org/hg/gamepad/raw-file/default/gamepad.html#idl-def-Gamepad
    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      var gamepads = [];
      // Spoof this function.
      navigator['getGamepads'] = function() {
        return gamepads;
      };
      window['addNewGamepad'] = function(id, numAxes, numButtons) {
        var index = gamepads.length;
        gamepads.push({
          axes: new Array(numAxes),
          buttons: new Array(numButtons),
          id: id,
          index: index
        });
        var i;
        for (i = 0; i < numAxes; i++) gamepads[index].axes[i] = 0;
        // Buttons are objects
        for (i = 0; i < numButtons; i++) gamepads[index].buttons[i] = { pressed: false, value: 0 };
      };
      // FF mutates the original objects.
      window['simulateGamepadButtonDown'] = function (index, button) {
        gamepads[index].buttons[button].pressed = true;
        gamepads[index].buttons[button].value = 1;
      };
      window['simulateGamepadButtonUp'] = function (index, button) {
        gamepads[index].buttons[button].pressed = false;
        gamepads[index].buttons[button].value = 0;
      };
      window['simulateAxisMotion'] = function (index, axis, value) {
        gamepads[index].axes[axis] = value;
      };
    ''')
    open(os.path.join(self.get_dir(), 'sdl_joystick.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_joystick.c')).read()))

    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_joystick.c'), '-O2', '--minify', '0', '-o', 'page.html', '--pre-js', 'pre.js']).communicate()
    self.run_browser('page.html', '', '/report_result?2')

  def test_webgl_context_attributes(self):
    # Javascript code to check the attributes support we want to test in the WebGL implementation 
    # (request the attribute, create a context and check its value afterwards in the context attributes).
    # Tests will succeed when an attribute is not supported.
    open(os.path.join(self.get_dir(), 'check_webgl_attributes_support.js'), 'w').write('''
      mergeInto(LibraryManager.library, {
        webglAntialiasSupported: function() {
          canvas = document.createElement('canvas');
          context = canvas.getContext('experimental-webgl', {antialias: true});
          attributes = context.getContextAttributes();
          return attributes.antialias;
        },
        webglDepthSupported: function() {
          canvas = document.createElement('canvas');
          context = canvas.getContext('experimental-webgl', {depth: true});
          attributes = context.getContextAttributes();
          return attributes.depth;
        },
        webglStencilSupported: function() {
          canvas = document.createElement('canvas');
          context = canvas.getContext('experimental-webgl', {stencil: true});
          attributes = context.getContextAttributes();
          return attributes.stencil;
       }
      });
    ''')
    
    # Copy common code file to temporary directory
    filepath = path_from_root('tests/test_webgl_context_attributes_common.c')
    temp_filepath = os.path.join(self.get_dir(), os.path.basename(filepath))
    shutil.copyfile(filepath, temp_filepath)
    
    # perform tests with attributes activated 
    self.btest('test_webgl_context_attributes_glut.c', '1', args=['--js-library', 'check_webgl_attributes_support.js', '-DAA_ACTIVATED', '-DDEPTH_ACTIVATED', '-DSTENCIL_ACTIVATED'])
    self.btest('test_webgl_context_attributes_sdl.c', '1', args=['--js-library', 'check_webgl_attributes_support.js', '-DAA_ACTIVATED', '-DDEPTH_ACTIVATED', '-DSTENCIL_ACTIVATED'])
    self.btest('test_webgl_context_attributes_glfw.c', '1', args=['--js-library', 'check_webgl_attributes_support.js', '-DAA_ACTIVATED', '-DDEPTH_ACTIVATED', '-DSTENCIL_ACTIVATED'])
    
    # perform tests with attributes desactivated
    self.btest('test_webgl_context_attributes_glut.c', '1', args=['--js-library', 'check_webgl_attributes_support.js'])
    self.btest('test_webgl_context_attributes_sdl.c', '1', args=['--js-library', 'check_webgl_attributes_support.js'])
    self.btest('test_webgl_context_attributes_glfw.c', '1', args=['--js-library', 'check_webgl_attributes_support.js'])
    
  def test_emscripten_get_now(self):
    self.btest('emscripten_get_now.cpp', '1')

  def test_file_db(self):
    secret = str(time.time())
    open('moar.txt', 'w').write(secret)
    self.btest('file_db.cpp', '1', args=['--preload-file', 'moar.txt', '-DFIRST'])
    shutil.copyfile('test.html', 'first.html')
    self.btest('file_db.cpp', secret)
    shutil.copyfile('test.html', 'second.html')
    open('moar.txt', 'w').write('aliantha')
    self.btest('file_db.cpp', secret, args=['--preload-file', 'moar.txt']) # even with a file there, we load over it
    shutil.move('test.html', 'third.html')

  def test_fs_idbfs_sync(self):
    secret = str(time.time())
    self.btest(path_from_root('tests', 'fs', 'test_idbfs_sync.c'), '1', force_c=True, args=['-DFIRST', '-DSECRET=\'' + secret + '\'', '-s', '''EXPORTED_FUNCTIONS=['_main', '_success']'''])
    self.btest(path_from_root('tests', 'fs', 'test_idbfs_sync.c'), '1', force_c=True, args=['-DSECRET=\'' + secret + '\'', '-s', '''EXPORTED_FUNCTIONS=['_main', '_success']'''])

  def test_sdl_pumpevents(self):
    # key events should be detected using SDL_PumpEvents
    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      function keydown(c) {
        var event = document.createEvent("KeyboardEvent");
        event.initKeyEvent("keydown", true, true, window,
                           0, 0, 0, 0,
                           c, c);
        document.dispatchEvent(event);
      }
    ''')
    self.btest('sdl_pumpevents.c', expected='7', args=['--pre-js', 'pre.js'])

  def test_sdl_audio(self):
    shutil.copyfile(path_from_root('tests', 'sounds', 'alarmvictory_1.ogg'), os.path.join(self.get_dir(), 'sound.ogg'))
    shutil.copyfile(path_from_root('tests', 'sounds', 'alarmcreatemiltaryfoot_1.wav'), os.path.join(self.get_dir(), 'sound2.wav'))
    shutil.copyfile(path_from_root('tests', 'sounds', 'noise.ogg'), os.path.join(self.get_dir(), 'noise.ogg'))
    shutil.copyfile(path_from_root('tests', 'sounds', 'the_entertainer.ogg'), os.path.join(self.get_dir(), 'the_entertainer.ogg'))
    open(os.path.join(self.get_dir(), 'bad.ogg'), 'w').write('I claim to be audio, but am lying')
    open(os.path.join(self.get_dir(), 'sdl_audio.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_audio.c')).read()))

    # use closure to check for a possible bug with closure minifying away newer Audio() attributes
    Popen([PYTHON, EMCC, '-O2', '--closure', '1', '--minify', '0', os.path.join(self.get_dir(), 'sdl_audio.c'), '--preload-file', 'sound.ogg', '--preload-file', 'sound2.wav', '--embed-file', 'the_entertainer.ogg', '--preload-file', 'noise.ogg', '--preload-file', 'bad.ogg', '-o', 'page.html', '-s', 'EXPORTED_FUNCTIONS=["_main", "_play", "_play2"]']).communicate()
    self.run_browser('page.html', '', '/report_result?1')

  def test_sdl_audio_mix_channels(self):
    shutil.copyfile(path_from_root('tests', 'sounds', 'noise.ogg'), os.path.join(self.get_dir(), 'sound.ogg'))
    open(os.path.join(self.get_dir(), 'sdl_audio_mix_channels.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_audio_mix_channels.c')).read()))

    Popen([PYTHON, EMCC, '-O2', '--minify', '0', os.path.join(self.get_dir(), 'sdl_audio_mix_channels.c'), '--preload-file', 'sound.ogg', '-o', 'page.html']).communicate()
    self.run_browser('page.html', '', '/report_result?1')

  def test_sdl_audio_mix(self):
    shutil.copyfile(path_from_root('tests', 'sounds', 'pluck.ogg'), os.path.join(self.get_dir(), 'sound.ogg'))
    shutil.copyfile(path_from_root('tests', 'sounds', 'the_entertainer.ogg'), os.path.join(self.get_dir(), 'music.ogg'))
    shutil.copyfile(path_from_root('tests', 'sounds', 'noise.ogg'), os.path.join(self.get_dir(), 'noise.ogg'))
    open(os.path.join(self.get_dir(), 'sdl_audio_mix.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_audio_mix.c')).read()))

    Popen([PYTHON, EMCC, '-O2', '--minify', '0', os.path.join(self.get_dir(), 'sdl_audio_mix.c'), '--preload-file', 'sound.ogg', '--preload-file', 'music.ogg', '--preload-file', 'noise.ogg', '-o', 'page.html']).communicate()
    self.run_browser('page.html', '', '/report_result?1')

  def test_sdl_audio_quickload(self):
    open(os.path.join(self.get_dir(), 'sdl_audio_quickload.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_audio_quickload.c')).read()))

    Popen([PYTHON, EMCC, '-O2', '--minify', '0', os.path.join(self.get_dir(), 'sdl_audio_quickload.c'), '-o', 'page.html', '-s', 'EXPORTED_FUNCTIONS=["_main", "_play"]']).communicate()
    self.run_browser('page.html', '', '/report_result?1')

  def test_sdl_audio_beeps(self):
    open(os.path.join(self.get_dir(), 'sdl_audio_beep.cpp'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_audio_beep.cpp')).read()))

    # use closure to check for a possible bug with closure minifying away newer Audio() attributes
    Popen([PYTHON, EMCC, '-O2', '--closure', '1', '--minify', '0', os.path.join(self.get_dir(), 'sdl_audio_beep.cpp'), '-s', 'DISABLE_EXCEPTION_CATCHING=0', '-o', 'page.html']).communicate()
    self.run_browser('page.html', '', '/report_result?1')

  def test_sdl_canvas_size(self):
    self.btest('sdl_canvas_size.c', reference='screenshot-gray-purple.png', reference_slack=1,
      args=['-O2', '--minify', '0', '--shell-file', path_from_root('tests', 'sdl_canvas_size.html'), '--preload-file', path_from_root('tests', 'screenshot.png') + '@/', '-s', 'LEGACY_GL_EMULATION=1'],
      message='You should see an image with gray at the top.')

  def test_sdl_gl_read(self):
    # SDL, OpenGL, readPixels
    open(os.path.join(self.get_dir(), 'sdl_gl_read.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_gl_read.c')).read()))
    Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_gl_read.c'), '-o', 'something.html']).communicate()
    self.run_browser('something.html', '.', '/report_result?1')

  def test_sdl_ogl(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('sdl_ogl.c', reference='screenshot-gray-purple.png', reference_slack=1,
      args=['-O2', '--minify', '0', '--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'],
      message='You should see an image with gray at the top.')

  def test_sdl_ogl_defaultmatrixmode(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('sdl_ogl_defaultMatrixMode.c', reference='screenshot-gray-purple.png', reference_slack=1,
      args=['--minify', '0', '--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'],
      message='You should see an image with gray at the top.')

  def test_sdl_ogl_p(self):
    # Immediate mode with pointers
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('sdl_ogl_p.c', reference='screenshot-gray.png', reference_slack=1,
      args=['--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'],
      message='You should see an image with gray at the top.')

  def test_sdl_ogl_proc_alias(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('sdl_ogl_proc_alias.c', reference='screenshot-gray-purple.png', reference_slack=1,
               args=['-O2', '-g2', '-s', 'INLINING_LIMIT=1', '--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1', '-s', 'VERBOSE=1'])

  def test_sdl_fog_simple(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('sdl_fog_simple.c', reference='screenshot-fog-simple.png',
      args=['-O2', '--minify', '0', '--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'],
      message='You should see an image with fog.')

  def test_sdl_fog_negative(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('sdl_fog_negative.c', reference='screenshot-fog-negative.png',
      args=['--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'],
      message='You should see an image with fog.')

  def test_sdl_fog_density(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('sdl_fog_density.c', reference='screenshot-fog-density.png',
      args=['--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'],
      message='You should see an image with fog.')

  def test_sdl_fog_exp2(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('sdl_fog_exp2.c', reference='screenshot-fog-exp2.png',
      args=['--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'],
      message='You should see an image with fog.')

  def test_sdl_fog_linear(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('sdl_fog_linear.c', reference='screenshot-fog-linear.png', reference_slack=1,
      args=['--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'],
      message='You should see an image with fog.')

  def test_openal_playback(self):
    shutil.copyfile(path_from_root('tests', 'sounds', 'audio.wav'), os.path.join(self.get_dir(), 'audio.wav'))
    open(os.path.join(self.get_dir(), 'openal_playback.cpp'), 'w').write(self.with_report_result(open(path_from_root('tests', 'openal_playback.cpp')).read()))

    Popen([PYTHON, EMCC, '-O2', os.path.join(self.get_dir(), 'openal_playback.cpp'), '--preload-file', 'audio.wav', '-o', 'page.html']).communicate()
    self.run_browser('page.html', '', '/report_result?1')

  def test_openal_buffers(self):
    shutil.copyfile(path_from_root('tests', 'sounds', 'the_entertainer.wav'), os.path.join(self.get_dir(), 'the_entertainer.wav'))
    self.btest('openal_buffers.c', '0', args=['--preload-file', 'the_entertainer.wav'],)

  def test_glfw(self):
    self.btest('glfw.c', '1', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_egl(self):
    open(os.path.join(self.get_dir(), 'test_egl.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'test_egl.c')).read()))

    Popen([PYTHON, EMCC, '-O2', os.path.join(self.get_dir(), 'test_egl.c'), '-o', 'page.html']).communicate()
    self.run_browser('page.html', '', '/report_result?1')

  def test_egl_width_height(self):
    open(os.path.join(self.get_dir(), 'test_egl_width_height.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'test_egl_width_height.c')).read()))

    Popen([PYTHON, EMCC, '-O2', os.path.join(self.get_dir(), 'test_egl_width_height.c'), '-o', 'page.html']).communicate()
    self.run_browser('page.html', 'Should print "(300, 150)" -- the size of the canvas in pixels', '/report_result?1')

  def get_freealut_library(self):
    if WINDOWS and Building.which('cmake'):
      return self.get_library('freealut', os.path.join('hello_world.bc'), configure=['cmake', '.'], configure_args=['-DBUILD_TESTS=ON'])
    else:
      return self.get_library('freealut', os.path.join('examples', '.libs', 'hello_world.bc'), make_args=['EXEEXT=.bc'])

  def test_freealut(self):
    programs = self.get_freealut_library()
    for program in programs:
      assert os.path.exists(program)
      Popen([PYTHON, EMCC, '-O2', program, '-o', 'page.html']).communicate()
      self.run_browser('page.html', 'You should hear "Hello World!"')

  def test_worker(self):
    # Test running in a web worker
    open('file.dat', 'w').write('data for worker')
    html_file = open('main.html', 'w')
    html_file.write('''
      <html>
      <body>
        Worker Test
        <script>
          var worker = new Worker('worker.js');
          worker.onmessage = function(event) {
            var xhr = new XMLHttpRequest();
            xhr.open('GET', 'http://localhost:8888/report_result?' + event.data);
            xhr.send();
            setTimeout(function() { window.close() }, 1000);
          };
        </script>
      </body>
      </html>
    ''')
    html_file.close()

    # no file data
    for file_data in [0, 1]:
      print 'file data', file_data
      output = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_worker.cpp'), '-o', 'worker.js'] + (['--preload-file', 'file.dat'] if file_data else []) , stdout=PIPE, stderr=PIPE).communicate()
      assert len(output[0]) == 0, output[0]
      assert os.path.exists('worker.js'), output
      if not file_data: self.assertContained('you should not see this text when in a worker!', run_js('worker.js')) # code should run standalone
      self.run_browser('main.html', '', '/report_result?hello%20from%20worker,%20and%20|' + ('data%20for%20w' if file_data else '') + '|')

  def test_chunked_synchronous_xhr(self):
    main = 'chunked_sync_xhr.html'
    worker_filename = "download_and_checksum_worker.js"

    html_file = open(main, 'w')
    html_file.write(r"""
      <!doctype html>
      <html>
      <head><meta charset="utf-8"><title>Chunked XHR</title></head>
      <html>
      <body>
        Chunked XHR Web Worker Test
        <script>
          var worker = new Worker(""" + json.dumps(worker_filename) + r""");
          var buffer = [];
          worker.onmessage = function(event) {
            if (event.data.channel === "stdout") {
              var xhr = new XMLHttpRequest();
              xhr.open('GET', 'http://localhost:8888/report_result?' + event.data.line);
              xhr.send();
              setTimeout(function() { window.close() }, 1000);
            } else {
              if (event.data.trace) event.data.trace.split("\n").map(function(v) { console.error(v); });
              if (event.data.line) {
                console.error(event.data.line);
              } else {
                var v = event.data.char;
                if (v == 10) {
                  var line = buffer.splice(0);
                  console.error(line = line.map(function(charCode){return String.fromCharCode(charCode);}).join(''));
                } else {
                  buffer.push(v);
                }
              }
            }
          };
        </script>
      </body>
      </html>
    """)
    html_file.close()

    c_source_filename = "checksummer.c"

    prejs_filename = "worker_prejs.js"
    prejs_file = open(prejs_filename, 'w')
    prejs_file.write(r"""
      if (typeof(Module) === "undefined") Module = {};
      Module["arguments"] = ["/bigfile"];
      Module["preInit"] = function() {
          FS.createLazyFile('/', "bigfile", "http://localhost:11111/bogus_file_path", true, false);
      };
      var doTrace = true;
      Module["print"] =    function(s) { self.postMessage({channel: "stdout", line: s}); };
      Module["stderr"] =   function(s) { self.postMessage({channel: "stderr", char: s, trace: ((doTrace && s === 10) ? new Error().stack : null)}); doTrace = false; };
    """)
    prejs_file.close()
    # vs. os.path.join(self.get_dir(), filename)
    # vs. path_from_root('tests', 'hello_world_gles.c')
    Popen([PYTHON, EMCC, path_from_root('tests', c_source_filename), '-g', '-s', 'SMALL_CHUNKS=1', '-o', worker_filename,
                                         '--pre-js', prejs_filename]).communicate()

    chunkSize = 1024
    data = os.urandom(10*chunkSize+1) # 10 full chunks and one 1 byte chunk
    checksum = zlib.adler32(data)

    server = multiprocessing.Process(target=test_chunked_synchronous_xhr_server, args=(True,chunkSize,data,checksum,))
    server.start()
    self.run_browser(main, 'Chunked binary synchronous XHR in Web Workers!', '/report_result?' + str(checksum))
    server.terminate()
    # Avoid race condition on cleanup, wait a bit so that processes have released file locks so that test tearDown won't
    # attempt to rmdir() files in use.
    if WINDOWS:
      time.sleep(2)

  def test_glgears(self):
    self.btest('hello_world_gles.c', reference='gears.png', reference_slack=1,
        args=['-DHAVE_BUILTIN_SINCOS'], outfile='something.html',
        message='You should see animating gears.')

  def test_glgears_animation(self):
    es2_suffix = ['', '_full', '_full_944']
    for full_es2 in [0, 1, 2]:
      print full_es2
      Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_gles%s.c' % es2_suffix[full_es2]), '-o', 'something.html',
                                           '-DHAVE_BUILTIN_SINCOS', '-s', 'GL_TESTING=1',
                                           '--shell-file', path_from_root('tests', 'hello_world_gles_shell.html')] +
            (['-s', 'FULL_ES2=1'] if full_es2 else []),
            ).communicate()
      self.run_browser('something.html', 'You should see animating gears.', '/report_gl_result?true')

  def test_fulles2_sdlproc(self):
    self.btest('full_es2_sdlproc.c', '1', args=['-s', 'GL_TESTING=1', '-DHAVE_BUILTIN_SINCOS', '-s', 'FULL_ES2=1'])

  def test_glgears_deriv(self):
    self.btest('hello_world_gles_deriv.c', reference='gears.png', reference_slack=1,
        args=['-DHAVE_BUILTIN_SINCOS'], outfile='something.html',
        message='You should see animating gears.')
    with open('something.html') as f:
      assert 'gl-matrix' not in f.read(), 'Should not include glMatrix when not needed'

  def test_glbook(self):
    programs = self.get_library('glbook', [
      os.path.join('Chapter_2', 'Hello_Triangle', 'CH02_HelloTriangle.bc'),
      os.path.join('Chapter_8', 'Simple_VertexShader', 'CH08_SimpleVertexShader.bc'),
      os.path.join('Chapter_9', 'Simple_Texture2D', 'CH09_SimpleTexture2D.bc'),
      os.path.join('Chapter_9', 'Simple_TextureCubemap', 'CH09_TextureCubemap.bc'),
      os.path.join('Chapter_9', 'TextureWrap', 'CH09_TextureWrap.bc'),
      os.path.join('Chapter_10', 'MultiTexture', 'CH10_MultiTexture.bc'),
      os.path.join('Chapter_13', 'ParticleSystem', 'CH13_ParticleSystem.bc'),
    ], configure=None)
    def book_path(*pathelems):
      return path_from_root('tests', 'glbook', *pathelems)
    for program in programs:
      print program
      basename = os.path.basename(program)
      args = []
      if basename == 'CH10_MultiTexture.bc':
        shutil.copyfile(book_path('Chapter_10', 'MultiTexture', 'basemap.tga'), os.path.join(self.get_dir(), 'basemap.tga'))
        shutil.copyfile(book_path('Chapter_10', 'MultiTexture', 'lightmap.tga'), os.path.join(self.get_dir(), 'lightmap.tga'))
        args = ['--preload-file', 'basemap.tga', '--preload-file', 'lightmap.tga']
      elif basename == 'CH13_ParticleSystem.bc':
        shutil.copyfile(book_path('Chapter_13', 'ParticleSystem', 'smoke.tga'), os.path.join(self.get_dir(), 'smoke.tga'))
        args = ['--preload-file', 'smoke.tga', '-O2'] # test optimizations and closure here as well for more coverage

      self.btest(program,
          reference=book_path(basename.replace('.bc', '.png')), args=args)

  def test_gles2_emulation(self):
    shutil.copyfile(path_from_root('tests', 'glbook', 'Chapter_10', 'MultiTexture', 'basemap.tga'), self.in_dir('basemap.tga'))
    shutil.copyfile(path_from_root('tests', 'glbook', 'Chapter_10', 'MultiTexture', 'lightmap.tga'), self.in_dir('lightmap.tga'))
    shutil.copyfile(path_from_root('tests', 'glbook', 'Chapter_13', 'ParticleSystem', 'smoke.tga'), self.in_dir('smoke.tga'))

    for source, reference in [
      (os.path.join('glbook', 'Chapter_2', 'Hello_Triangle', 'Hello_Triangle_orig.c'), path_from_root('tests', 'glbook', 'CH02_HelloTriangle.png')),
      #(os.path.join('glbook', 'Chapter_8', 'Simple_VertexShader', 'Simple_VertexShader_orig.c'), path_from_root('tests', 'glbook', 'CH08_SimpleVertexShader.png')), # XXX needs INT extension in WebGL
      (os.path.join('glbook', 'Chapter_9', 'TextureWrap', 'TextureWrap_orig.c'), path_from_root('tests', 'glbook', 'CH09_TextureWrap.png')),
      #(os.path.join('glbook', 'Chapter_9', 'Simple_TextureCubemap', 'Simple_TextureCubemap_orig.c'), path_from_root('tests', 'glbook', 'CH09_TextureCubemap.png')), # XXX needs INT extension in WebGL
      (os.path.join('glbook', 'Chapter_9', 'Simple_Texture2D', 'Simple_Texture2D_orig.c'), path_from_root('tests', 'glbook', 'CH09_SimpleTexture2D.png')),
      (os.path.join('glbook', 'Chapter_10', 'MultiTexture', 'MultiTexture_orig.c'), path_from_root('tests', 'glbook', 'CH10_MultiTexture.png')),
      (os.path.join('glbook', 'Chapter_13', 'ParticleSystem', 'ParticleSystem_orig.c'), path_from_root('tests', 'glbook', 'CH13_ParticleSystem.png')),
    ]:
      print source
      self.btest(source,
                 reference=reference,
                 args=['-I' + path_from_root('tests', 'glbook', 'Common'),
                       path_from_root('tests', 'glbook', 'Common', 'esUtil.c'),
                       path_from_root('tests', 'glbook', 'Common', 'esShader.c'),
                       path_from_root('tests', 'glbook', 'Common', 'esShapes.c'),
                       path_from_root('tests', 'glbook', 'Common', 'esTransform.c'),
                       '-s', 'FULL_ES2=1',
                       '--preload-file', 'basemap.tga', '--preload-file', 'lightmap.tga', '--preload-file', 'smoke.tga'])

  def test_emscripten_api(self):
    self.btest('emscripten_api_browser.cpp', '1', args=['-s', '''EXPORTED_FUNCTIONS=['_main', '_third']'''])

  def test_emscripten_api2(self):
    def setup():
      open('script1.js', 'w').write('''
        Module._set(456);
      ''')
      open('file1.txt', 'w').write('first');
      open('file2.txt', 'w').write('second');

    setup()
    Popen([PYTHON, FILE_PACKAGER, 'test.data', '--preload', 'file1.txt', 'file2.txt'], stdout=open('script2.js', 'w')).communicate()
    self.btest('emscripten_api_browser2.cpp', '1', args=['-s', '''EXPORTED_FUNCTIONS=['_main', '_set']'''])

    # check using file packager to another dir
    self.clear()
    setup()
    os.mkdir('sub')
    Popen([PYTHON, FILE_PACKAGER, 'sub/test.data', '--preload', 'file1.txt', 'file2.txt'], stdout=open('script2.js', 'w')).communicate()
    shutil.copyfile(os.path.join('sub', 'test.data'), 'test.data')
    self.btest('emscripten_api_browser2.cpp', '1', args=['-s', '''EXPORTED_FUNCTIONS=['_main', '_set']'''])

  def test_emscripten_api_infloop(self):
    self.btest('emscripten_api_browser_infloop.cpp', '7')

  def test_emscripten_fs_api(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png')) # preloaded *after* run
    self.btest('emscripten_fs_api_browser.cpp', '1')

  def test_sdl_quit(self):
    self.btest('sdl_quit.c', '1')

  def test_sdl_resize(self):
    self.btest('sdl_resize.c', '1')

  def test_glshaderinfo(self):
    self.btest('glshaderinfo.cpp', '1')

  def test_glgetattachedshaders(self):
    self.btest('glgetattachedshaders.c', '1')

  def test_sdlglshader(self):
    self.btest('sdlglshader.c', reference='sdlglshader.png', args=['-O2', '--closure', '1', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_gl_ps(self):
    # pointers and a shader
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('gl_ps.c', reference='gl_ps.png', args=['--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'], reference_slack=1)

  def test_gl_ps_packed(self):
    # packed data that needs to be strided
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('gl_ps_packed.c', reference='gl_ps.png', args=['--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'], reference_slack=1)

  def test_gl_ps_strides(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('gl_ps_strides.c', reference='gl_ps_strides.png', args=['--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_gl_renderers(self):
    self.btest('gl_renderers.c', reference='gl_renderers.png', args=['-s', 'GL_UNSAFE_OPTS=0', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_gl_stride(self):
    self.btest('gl_stride.c', reference='gl_stride.png', args=['-s', 'GL_UNSAFE_OPTS=0', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_gl_vertex_buffer_pre(self):
    self.btest('gl_vertex_buffer_pre.c', reference='gl_vertex_buffer_pre.png', args=['-s', 'GL_UNSAFE_OPTS=0', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_gl_vertex_buffer(self):
    self.btest('gl_vertex_buffer.c', reference='gl_vertex_buffer.png', args=['-s', 'GL_UNSAFE_OPTS=0', '-s', 'LEGACY_GL_EMULATION=1'], reference_slack=1)

  # Does not pass due to https://bugzilla.mozilla.org/show_bug.cgi?id=924264 so disabled for now.
  # def test_gles2_uniform_arrays(self):
  #  self.btest('gles2_uniform_arrays.cpp', args=['-s', 'GL_ASSERTIONS=1'], expected=['1'])

  def test_gles2_conformance(self):
    self.btest('gles2_conformance.cpp', args=['-s', 'GL_ASSERTIONS=1'], expected=['1'])

  def test_matrix_identity(self):
    self.btest('gl_matrix_identity.c', expected=['-1882984448', '460451840', '1588195328'], args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_pre(self):
    self.btest('cubegeom_pre.c', reference='cubegeom_pre.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_pre2(self):
    self.btest('cubegeom_pre2.c', reference='cubegeom_pre2.png', args=['-s', 'GL_DEBUG=1', '-s', 'LEGACY_GL_EMULATION=1']) # some coverage for GL_DEBUG not breaking the build

  def test_cubegeom_pre3(self):
    self.btest('cubegeom_pre3.c', reference='cubegeom_pre2.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom(self):
    self.btest('cubegeom.c', reference='cubegeom.png', args=['-O2', '-g', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_proc(self):
    open('side.c', 'w').write(r'''

extern void* SDL_GL_GetProcAddress(const char *);

void *glBindBuffer = 0; // same name as the gl function, to check that the collision does not break us

void *getBindBuffer() {
  if (!glBindBuffer) glBindBuffer = SDL_GL_GetProcAddress("glBindBuffer");
  return glBindBuffer;
}
''')
    for opts in [0, 1]:
      self.btest('cubegeom_proc.c', reference='cubegeom.png', args=['-O' + str(opts), 'side.c', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_glew(self):
    self.btest('cubegeom_glew.c', reference='cubegeom.png', args=['-O2', '--closure', '1', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_color(self):
    self.btest('cubegeom_color.c', reference='cubegeom_color.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_normal(self):
    self.btest('cubegeom_normal.c', reference='cubegeom_normal.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_normal_dap(self): # draw is given a direct pointer to clientside memory, no element array buffer
    self.btest('cubegeom_normal_dap.c', reference='cubegeom_normal.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_normal_dap_far(self): # indices do nto start from 0
    self.btest('cubegeom_normal_dap_far.c', reference='cubegeom_normal.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_normal_dap_far_range(self): # glDrawRangeElements
    self.btest('cubegeom_normal_dap_far_range.c', reference='cubegeom_normal.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_normal_dap_far_glda(self): # use glDrawArrays
    self.btest('cubegeom_normal_dap_far_glda.c', reference='cubegeom_normal_dap_far_glda.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_normal_dap_far_glda_quad(self): # with quad
    self.btest('cubegeom_normal_dap_far_glda_quad.c', reference='cubegeom_normal_dap_far_glda_quad.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_mt(self):
    self.btest('cubegeom_mt.c', reference='cubegeom_mt.png', args=['-s', 'LEGACY_GL_EMULATION=1']) # multitexture

  def test_cubegeom_color2(self):
    self.btest('cubegeom_color2.c', reference='cubegeom_color2.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_texturematrix(self):
    self.btest('cubegeom_texturematrix.c', reference='cubegeom_texturematrix.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_fog(self):
    self.btest('cubegeom_fog.c', reference='cubegeom_fog.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_pre_vao(self):
    self.btest('cubegeom_pre_vao.c', reference='cubegeom_pre_vao.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_pre2_vao(self):
    self.btest('cubegeom_pre2_vao.c', reference='cubegeom_pre_vao.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cubegeom_pre2_vao2(self):
    self.btest('cubegeom_pre2_vao2.c', reference='cubegeom_pre2_vao2.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_cube_explosion(self):
    self.btest('cube_explosion.c', reference='cube_explosion.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_glgettexenv(self):
    self.btest('glgettexenv.c', args=['-s', 'LEGACY_GL_EMULATION=1'], expected=['1'])

  def test_sdl_canvas_blank(self):
    self.btest('sdl_canvas_blank.c', reference='sdl_canvas_blank.png')

  def test_sdl_canvas_palette(self):
    self.btest('sdl_canvas_palette.c', reference='sdl_canvas_palette.png')

  def test_sdl_canvas_twice(self):
    self.btest('sdl_canvas_twice.c', reference='sdl_canvas_twice.png')

  def test_sdl_maprgba(self):
    self.btest('sdl_maprgba.c', reference='sdl_maprgba.png', reference_slack=3)

  def test_sdl_rotozoom(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('sdl_rotozoom.c', reference='sdl_rotozoom.png', args=['--preload-file', 'screenshot.png'])

  def test_sdl_gfx_primitives(self):
    self.btest('sdl_gfx_primitives.c', reference='sdl_gfx_primitives.png', reference_slack=1)

  def test_sdl_canvas_palette_2(self):
    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      Module['preRun'].push(function() {
        SDL.defaults.copyOnLock = false;
      });
    ''')

    open(os.path.join(self.get_dir(), 'args-r.js'), 'w').write('''
      Module['arguments'] = ['-r'];
    ''')

    open(os.path.join(self.get_dir(), 'args-g.js'), 'w').write('''
      Module['arguments'] = ['-g'];
    ''')

    open(os.path.join(self.get_dir(), 'args-b.js'), 'w').write('''
      Module['arguments'] = ['-b'];
    ''')

    self.btest('sdl_canvas_palette_2.c', reference='sdl_canvas_palette_r.png', args=['--pre-js', 'pre.js', '--pre-js', 'args-r.js'])
    self.btest('sdl_canvas_palette_2.c', reference='sdl_canvas_palette_g.png', args=['--pre-js', 'pre.js', '--pre-js', 'args-g.js'])
    self.btest('sdl_canvas_palette_2.c', reference='sdl_canvas_palette_b.png', args=['--pre-js', 'pre.js', '--pre-js', 'args-b.js'])

  def test_sdl_alloctext(self):
    self.btest('sdl_alloctext.c', expected='1', args=['-O2', '-s', 'TOTAL_MEMORY=' + str(1024*1024*8)])

  def test_sdl_surface_refcount(self):
    self.btest('sdl_surface_refcount.c', expected='1')

  def test_glbegin_points(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
    self.btest('glbegin_points.c', reference='glbegin_points.png', args=['--preload-file', 'screenshot.png', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_s3tc(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.dds'), os.path.join(self.get_dir(), 'screenshot.dds'))
    self.btest('s3tc.c', reference='s3tc.png', args=['--preload-file', 'screenshot.dds', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_s3tc_ffp_only(self):
    shutil.copyfile(path_from_root('tests', 'screenshot.dds'), os.path.join(self.get_dir(), 'screenshot.dds'))
    self.btest('s3tc.c', reference='s3tc.png', args=['--preload-file', 'screenshot.dds', '-s', 'LEGACY_GL_EMULATION=1', '-s', 'GL_FFP_ONLY=1'])

  def test_s3tc_crunch(self):
    shutil.copyfile(path_from_root('tests', 'ship.dds'), 'ship.dds')
    shutil.copyfile(path_from_root('tests', 'bloom.dds'), 'bloom.dds')
    shutil.copyfile(path_from_root('tests', 'water.dds'), 'water.dds')
    Popen([PYTHON, FILE_PACKAGER, 'test.data', '--crunch', '--preload', 'ship.dds', 'bloom.dds', 'water.dds'], stdout=open('pre.js', 'w')).communicate()
    assert os.stat('test.data').st_size < 0.5*(os.stat('ship.dds').st_size+os.stat('bloom.dds').st_size+os.stat('water.dds').st_size), 'Compressed should be smaller than dds'
    shutil.move('ship.dds', 'ship.donotfindme.dds') # make sure we load from the compressed
    shutil.move('bloom.dds', 'bloom.donotfindme.dds') # make sure we load from the compressed
    shutil.move('water.dds', 'water.donotfindme.dds') # make sure we load from the compressed
    self.btest('s3tc_crunch.c', reference='s3tc_crunch.png', reference_slack=11, args=['--pre-js', 'pre.js', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_s3tc_crunch_split(self): # load several datafiles/outputs of file packager
    shutil.copyfile(path_from_root('tests', 'ship.dds'), 'ship.dds')
    shutil.copyfile(path_from_root('tests', 'bloom.dds'), 'bloom.dds')
    shutil.copyfile(path_from_root('tests', 'water.dds'), 'water.dds')
    Popen([PYTHON, FILE_PACKAGER, 'asset_a.data', '--crunch', '--preload', 'ship.dds', 'bloom.dds'], stdout=open('asset_a.js', 'w')).communicate()
    Popen([PYTHON, FILE_PACKAGER, 'asset_b.data', '--crunch', '--preload', 'water.dds'], stdout=open('asset_b.js', 'w')).communicate()
    shutil.move('ship.dds', 'ship.donotfindme.dds') # make sure we load from the compressed
    shutil.move('bloom.dds', 'bloom.donotfindme.dds') # make sure we load from the compressed
    shutil.move('water.dds', 'water.donotfindme.dds') # make sure we load from the compressed
    self.btest('s3tc_crunch.c', reference='s3tc_crunch.png', reference_slack=11, args=['--pre-js', 'asset_a.js', '--pre-js', 'asset_b.js', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_aniso(self):
    if SPIDERMONKEY_ENGINE in JS_ENGINES:
      # asm.js-ification check
      Popen([PYTHON, EMCC, path_from_root('tests', 'aniso.c'), '-O2', '-g2', '-s', 'LEGACY_GL_EMULATION=1']).communicate()
      Settings.ASM_JS = 1
      self.run_generated_code(SPIDERMONKEY_ENGINE, 'a.out.js')
      print 'passed asm test'

    shutil.copyfile(path_from_root('tests', 'water.dds'), 'water.dds')
    self.btest('aniso.c', reference='aniso.png', reference_slack=2, args=['--preload-file', 'water.dds', '-s', 'LEGACY_GL_EMULATION=1'])

  def test_tex_nonbyte(self):
    self.btest('tex_nonbyte.c', reference='tex_nonbyte.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_float_tex(self):
    self.btest('float_tex.cpp', reference='float_tex.png')

  def test_subdata(self):
    self.btest('gl_subdata.cpp', reference='float_tex.png')

  def test_perspective(self):
    self.btest('perspective.c', reference='perspective.png', args=['-s', 'LEGACY_GL_EMULATION=1'])

  def test_runtimelink(self):
    return self.skip('BUILD_AS_SHARED_LIB=2 is deprecated')
    main, supp = self.setup_runtimelink_test()

    open(self.in_dir('supp.cpp'), 'w').write(supp)
    Popen([PYTHON, EMCC, self.in_dir('supp.cpp'), '-o', 'supp.js', '-s', 'LINKABLE=1', '-s', 'NAMED_GLOBALS=1', '-s', 'BUILD_AS_SHARED_LIB=2', '-O2', '-s', 'ASM_JS=0']).communicate()
    shutil.move(self.in_dir('supp.js'), self.in_dir('supp.so'))

    self.btest(main, args=['-s', 'LINKABLE=1', '-s', 'NAMED_GLOBALS=1', '-s', 'RUNTIME_LINKED_LIBS=["supp.so"]', '-DBROWSER=1', '-O2', '-s', 'ASM_JS=0'], expected='76')

  def test_pre_run_deps(self):
    # Adding a dependency in preRun will delay run
    open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
      Module.preRun = function() {
        addRunDependency();
        Module.print('preRun called, added a dependency...');
        setTimeout(function() {
          Module.okk = 10;
          removeRunDependency()
        }, 2000);
      };
    ''')

    for mem in [0, 1]:
      self.btest('pre_run_deps.cpp', expected='10', args=['--pre-js', 'pre.js', '--memory-init-file', str(mem)])

  def test_worker_api(self):
    Popen([PYTHON, EMCC, path_from_root('tests', 'worker_api_worker.cpp'), '-o', 'worker.js', '-s', 'BUILD_AS_WORKER=1', '-s', 'EXPORTED_FUNCTIONS=["_one"]']).communicate()
    self.btest('worker_api_main.cpp', expected='566')

  def test_worker_api_2(self):
    Popen([PYTHON, EMCC, path_from_root('tests', 'worker_api_2_worker.cpp'), '-o', 'worker.js', '-s', 'BUILD_AS_WORKER=1', '-O2', '--minify', '0', '-s', 'EXPORTED_FUNCTIONS=["_one", "_two", "_three", "_four"]']).communicate()
    self.btest('worker_api_2_main.cpp', args=['-O2', '--minify', '0'], expected='11')

  def test_emscripten_async_wget2(self):
    self.btest('http.cpp', expected='0', args=['-I' + path_from_root('tests')])

  def test_module(self):
    def nfc():
      Popen([PYTHON, EMCC, path_from_root('tests', 'browser_module.cpp'), '-o', 'module.js', '-O2', '-s', 'SIDE_MODULE=1', '-s', 'DLOPEN_SUPPORT=1', '-s', 'EXPORTED_FUNCTIONS=["_one", "_two"]']).communicate()
      self.btest('browser_main.cpp', args=['-O2', '-s', 'MAIN_MODULE=1', '-s', 'DLOPEN_SUPPORT=1'], expected='8')
    nonfastcomp(nfc)

  def test_mmap_file(self):
    open(self.in_dir('data.dat'), 'w').write('data from the file ' + ('.' * 9000))
    for extra_args in [[], ['--no-heap-copy']]:
      self.btest(path_from_root('tests', 'mmap_file.c'), expected='1', args=['--preload-file', 'data.dat'] + extra_args)

  def test_emrun_info(self):
    result = subprocess.check_output([PYTHON, path_from_root('emrun'), '--system_info', '--browser_info'])
    assert 'CPU' in result
    assert 'Browser' in result
    assert 'Traceback' not in result

    result = subprocess.check_output([PYTHON, path_from_root('emrun'), '--list_browsers'])
    assert 'Traceback' not in result

  def test_emrun(self):
    Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_exit.c'), '--emrun', '-o', 'hello_world.html']).communicate()
    outdir = os.getcwd()
    # We cannot run emrun from the temp directory the suite will clean up afterwards, since the browser that is launched will have that directory as startup directory,
    # and the browser will not close as part of the test, pinning down the cwd on Windows and it wouldn't be possible to delete it. Therefore switch away from that directory
    # before launching.
    os.chdir(path_from_root())
    args = [PYTHON, path_from_root('emrun'), '--timeout', '30', '--verbose', os.path.join(outdir, 'hello_world.html'), '1', '2', '3', '--log_stdout', os.path.join(outdir, 'stdout.txt'), '--log_stderr', os.path.join(outdir, 'stderr.txt')]
    if emscripten_browser is not None:
      args += ['--browser', emscripten_browser]
    process = subprocess.Popen(args)
    process.communicate()
    stdout = open(os.path.join(outdir, 'stdout.txt'), 'r').read()
    stderr = open(os.path.join(outdir, 'stderr.txt'), 'r').read()
    assert process.returncode == 100
    assert 'argc: 4' in stdout
    assert 'argv[3]: 3' in stdout
    assert 'hello, world!' in stdout
    assert 'hello, error stream!' in stderr

  def test_uuid(self):
    # Run with ./runner.py browser.test_uuid
    # We run this test in Node/SPIDERMONKEY and browser environments because we try to make use of
    # high quality crypto random number generators such as crypto.getRandomValues or randomBytes (if available).

    # First run tests in Node and/or SPIDERMONKEY using run_js. Use closure compiler so we can check that
    # require('crypto').randomBytes and window.crypto.getRandomValues doesn't get minified out.
    Popen([PYTHON, EMCC, '-O2', '--closure', '1', path_from_root('tests', 'uuid', 'test.c'), '-o', path_from_root('tests', 'uuid', 'test.js')], stdout=PIPE, stderr=PIPE).communicate()

    test_js_closure = open(path_from_root('tests', 'uuid', 'test.js')).read()

    # Check that test.js compiled with --closure 1 contains ").randomBytes" and "window.crypto.getRandomValues"
    assert ").randomBytes" in test_js_closure
    assert "window.crypto.getRandomValues" in test_js_closure

    out = run_js(path_from_root('tests', 'uuid', 'test.js'), full_output=True)
    print out

    # Tidy up files that might have been created by this test.
    try_delete(path_from_root('tests', 'uuid', 'test.js'))
    try_delete(path_from_root('tests', 'uuid', 'test.js.map'))

    # Now run test in browser
    self.btest(path_from_root('tests', 'uuid', 'test.c'), '1')

  def test_glew(self):
    self.btest(path_from_root('tests', 'glew.c'), expected='1')
    self.btest(path_from_root('tests', 'glew.c'), args=['-s', 'LEGACY_GL_EMULATION=1'], expected='1')
    self.btest(path_from_root('tests', 'glew.c'), args=['-DGLEW_MX'], expected='1')
    self.btest(path_from_root('tests', 'glew.c'), args=['-s', 'LEGACY_GL_EMULATION=1', '-DGLEW_MX'], expected='1')

  def test_doublestart_bug(self):
    open('pre.js', 'w').write(r'''
if (typeof Module === 'undefined') Module = eval('(function() { try { return Module || {} } catch(e) { return {} } })()');
if (!Module['preRun']) Module['preRun'] = [];
Module["preRun"].push(function () {
    Module['addRunDependency']('test_run_dependency');
    Module['removeRunDependency']('test_run_dependency');
});
''')

    self.btest('doublestart.c', args=['--pre-js', 'pre.js', '-o', 'test.html'], expected='1')

  def test_html5(self):
    self.btest(path_from_root('tests', 'test_html5.c'), expected='0')

  def test_html5_fullscreen(self):
    self.btest(path_from_root('tests', 'test_html5_fullscreen.c'), expected='0')

  def test_codemods(self):
    for opt_level in [0, 2]:
      print 'opt level', opt_level
      opts = '-O' + str(opt_level)
      # sanity checks, building with and without precise float semantics generates different results
      self.btest(path_from_root('tests', 'codemods.cpp'), expected='2', args=[opts])
      self.btest(path_from_root('tests', 'codemods.cpp'), expected='1', args=[opts, '-s', 'PRECISE_F32=1'])
      self.btest(path_from_root('tests', 'codemods.cpp'), expected='1', args=[opts, '-s', 'PRECISE_F32=2']) # empty polyfill, but browser has support, so semantics are like float

      # now use a shell to remove the browser's fround support
      open(self.in_dir('shell.html'), 'w').write(open(path_from_root('src', 'shell.html')).read().replace('var Module = {', '''
  Math.fround = null;
  var Module = {
  '''))
      self.btest(path_from_root('tests', 'codemods.cpp'), expected='2', args=[opts, '--shell-file', 'shell.html'])
      self.btest(path_from_root('tests', 'codemods.cpp'), expected='1', args=[opts, '--shell-file', 'shell.html', '-s', 'PRECISE_F32=1'])
      self.btest(path_from_root('tests', 'codemods.cpp'), expected='2', args=[opts, '--shell-file', 'shell.html', '-s', 'PRECISE_F32=2']) # empty polyfill, no browser support, so semantics are like double

      # finally, remove fround, patch up fround as the code executes (after polyfilling etc.), to verify that we got rid of it entirely on the client side
      fixer = 'python fix.py'
      open('fix.py', 'w').write(r'''
import sys
filename = sys.argv[1]
js = open(filename).read()
replaced = js.replace("var Math_fround = Math.fround;", "var Math_fround = Math.fround = function(x) { return 0; }")
assert js != replaced
open(filename, 'w').write(replaced)
  ''')
      self.btest(path_from_root('tests', 'codemods.cpp'), expected='2', args=[opts, '--shell-file', 'shell.html', '--js-transform', fixer]) # no fround anyhow
      self.btest(path_from_root('tests', 'codemods.cpp'), expected='121378', args=[opts, '--shell-file', 'shell.html', '--js-transform', fixer, '-s', 'PRECISE_F32=1']) # proper polyfill was enstated, then it was replaced by the fix so 0 is returned all the time, hence a different result here
      self.btest(path_from_root('tests', 'codemods.cpp'), expected='2', args=[opts, '--shell-file', 'shell.html', '--js-transform', fixer, '-s', 'PRECISE_F32=2']) # we should remove the calls to the polyfill ENTIRELY here, on the clientside, so we should NOT see any calls to fround here, and result should be like double