Don't report coverage for non-Python source files even if __file__ says they were executed.

Closes #82

1 files changed, 18 insertions, 0 deletions

diff --git a/test/test_html.py b/test/test_html.py
index c5c87d2a..96f98c83 100644
--- a/test/test_html.py
+++ b/test/test_html.py
@@ -195,3 +195,21 @@ class HtmlWithUnparsableFilesTest(CoverageTest):
         self.make_file("innocuous.html", "<h1>This isn't python at all!</h1>")
         output = self.run_command("coverage html")
         self.assertEqual(output.strip(), "No data to report.")
+
+    def test_execed_liar_ignored(self):
+        """
+        Jinja2 sets __file__ to be a non-Python file, and then execs code.
+
+        If that file contains non-Python code, a TokenError shouldn't
+        have been raised when writing the HTML report.
+
+        """
+
+        source = "exec compile('', '', 'exec') in {'__file__' : 'liar.html'}"
+        self.make_file("liar.py", source)
+        self.make_file("liar.html", "{# Whoops, not python code #}")
+        cov = coverage.coverage()
+        cov.start()
+        self.import_local_file("liar")
+        cov.stop()
+        cov.html_report()