Add test with non-unicode text file

Author: Jaap Roes

tests/test_source.py

@@ -64,3 +64,10 @@ def test_customized_extensions(self):
         self.assert_analysis([1], name="phd.tex", missing=[1])
         # The editor leave-behinds are not in the measured files.
         self.assert_measured_files("main.html", "unused.html", "phd.tex")
+
+    def test_non_utf8(self):
+        # Template containing a word encoded in CP-1252
+        self.make_file(self._path("german.txt"), bytes=b"sh\xf6n")
+        self.run_django_coverage(name="german.txt")
+        self.assert_measured_files("german.txt")
+        self.assert_analysis([1], name="german.txt")