Adding a test for the debugger middleware.

pecan/tests/test_debug.py

@@ -0,0 +1,25 @@
+from unittest import TestCase
+from webtest import TestApp
+
+from pecan.debug import DebugMiddleware
+
+
+class TestDebugMiddleware(TestCase):
+
+    def setUp(self):
+        def conditional_error_app(environ, start_response):
+            if environ['PATH_INFO'] == '/error':
+                assert 1 == 2
+            start_response("200 OK", [('Content-type', 'text/plain')])
+            return ['requested page returned']
+        self.app = TestApp(DebugMiddleware(conditional_error_app))
+
+    def test_middleware_passes_through_when_no_exception_raised(self):
+        r = self.app.get('/')
+        assert r.status_int == 200
+        assert r.body == 'requested page returned'
+
+    def test_middleware_gives_stack_trace_on_errors(self):
+        r = self.app.get('/error', expect_errors=True)
+        assert r.status_int == 400
+        assert 'AssertionError' in r.body