I'm fairly new to Python, so my apologies in advance if this is much ado for something basic.
I have situation similar to How do you set up a Flask application with SQLAlchemy for testing? The big difference for me is that unlike most other Flask examples I see on the Internet, most of the code I have for my application is in a class. For some reason, this is causing my unit testing to not work correctly. Below is a basic setup of my application and tests:
from Flask import Flask app = Flask(__name__) class MyApplication(): def __init__(self, param1, param2): app.add_url("/path/<methodParam>", "method1", self.method1, methods=["POST"]) # Initialize the app def getApplication(self): options = # application configuration options middleware = ApplicationMiddleware(app, options) return middleware def method1(self, methodParam): # Does useful stuff that should be tested # More methods, etc.
import unittest from apppackage import MyApplication class ApplicationTestCase(unittest.TestCase): def setUp(self): self.tearDown() param1 = # Param values param2 = # Param values # Other local setup self.app = MyApplication(param1, param2).app.test_client() def tearDown(self): # Clean up tests def test_method1(self): methodParam = # Param value response = self.app.post("path/methodParam") assert(reponse.status_code == 200)
When I run my tests via
nosetests --with-coverage --cover-package apppackage ./test/test_application.py
I get the following error:
param2).app.test_client() AttributeError: MyApplication instance has no attribute 'app'
I've tried moving app inside the class declaration, but that doesn't do any good, and isn't how every other unit testing guide I've seen does it. Why can't my unit tests find the "app" attribute?
Your unit test cannot find the "app" attribute because MyApplication does not have one. There is an "app" attribute in the module where MyApplication is defined. But those are two separate places.
Perhaps try the following:
class MyApplication(object): def __init__(self, param1, param2): self.app = Flask(__name__) self.app.add_url("/path/<methodParam>", "method1", self.method1, methods=["POST"]) # Initialize the app
Alternatively, you also seem to have a "getApplication" method which you aren't really doing anything with, but I imagine that you're using it for something. Perhaps you actually want this in your test...
def setUp(self): self.tearDown() param1 = # Param values param2 = # Param values # Other local setup self.app = MyApplication(param1, param2).getApplication().test_client()