2 files changed, 14 insertions, 0 deletions
diff --git a/tests/runner.py b/tests/runner.py
index 7fc2f284..62e1b7e1 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -8323,6 +8323,18 @@ fscanfed: 10 - hello
       Popen(['python', FILE_PACKAGER, 'test.data', '--pre-run', '--crunch=32', '--preload', 'ship.dds'], stdout=open('pre.js', 'w')).communicate()
       assert crunch_time < os.stat('ship.crn').st_mtime, 'Crunch was changed'
 
+    def test_headless(self):
+      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'example.png'))
+      Popen(['python', EMCC, path_from_root('tests', 'sdl_canvas.c'), '-s', 'HEADLESS=1']).communicate()
+      output = run_js('a.out.js', engine=SPIDERMONKEY_ENGINE, stderr=PIPE)
+      assert '''Init: 0
+Font: 0x1
+Sum: 0
+you should see two lines of text in different colors and a blue rectangle
+SDL_Quit called (and ignored)
+done.
+''' in output, output
+
 elif 'browser' in str(sys.argv):
   # Browser tests.
 
diff --git a/tests/sdl_canvas.c b/tests/sdl_canvas.c
index 5d1c849c..7dcfa043 100644
--- a/tests/sdl_canvas.c
+++ b/tests/sdl_canvas.c
@@ -53,6 +53,8 @@ int main(int argc, char **argv) {
 
   SDL_Quit();
 
+  printf("done.\n");
+
   int result = sum > 3000 && sum < 5000; // varies a little on different browsers, font differences?
   REPORT_RESULT();