add unit tests

tests/test_request_stream.py

@@ -185,6 +185,11 @@ def test_request_stream_handle_exception():
     assert response.status == 404
     assert response.text == 'Error: Requested URL /in_valid_post not found'
 
+    # 405
+    request, response = app.test_client.get('/post/random_id', data=data)
+    assert response.status == 405
+    assert response.text == 'Error: Method GET not allowed for URL /post/random_id'
+
 
 def test_request_stream_blueprint():
     '''for self.is_request_stream = True'''