assert in btest on successful compilation

1 files changed, 3 insertions, 1 deletions

diff --git a/tests/runner.py b/tests/runner.py
index 2c6af351..8feb83f9 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -649,6 +649,7 @@ class BrowserCore(RunnerCore):
       self.reftest(path_from_root('tests', reference))
       args = args + ['--pre-js', 'reftest.js', '-s', 'GL_TESTING=1']
     Popen([PYTHON, EMCC, temp_filepath, '-o', outfile] + args).communicate()
+    assert os.path.exists(outfile)
     if type(expected) is str: expected = [expected]
     self.run_browser(outfile, message, ['/report_result?' + e for e in expected])
 
@@ -771,4 +772,5 @@ an individual test with
   else:
     testRunner = unittest.TextTestRunner(verbosity=2)
     for suite in suites:
-      testRunner.run(suite)
\ No newline at end of file
+      testRunner.run(suite)
+