wsgi2_test.py: add test for Internal Server Error

greentest/wsgi2_test.py

@@ -6,5 +6,35 @@ del TestHttps, TestChunkedApp, TestBigChunks
 
 TestCase.get_wsgi_module = lambda *args: wsgi2
 
+class Expected(Exception):
+    pass
+
+class TestError(TestCase):
+
+    @staticmethod
+    def application(env, start_response):
+        raise Expected
+
+    @property
+    def url(self):
+        return 'http://127.0.0.1:%s' % self.port
+
+    def test(self):
+        try:
+            r = urllib2.urlopen(self.url)
+            raise AssertionError('Must raise HTTPError, returned %r: %s' % (r, r.code))
+        except urllib2.HTTPError, ex:
+            assert ex.code == 500, ex
+            assert ex.msg == 'Internal Server Error', ex
+
+
+class TestError_after_start_response(TestError):
+
+    @staticmethod
+    def application(env, start_response):
+        start_response('200 OK', [('Content-Type', 'text/plain')])
+        raise Expected
+
+
 if __name__ == '__main__':
     greentest.main()