02. Testing in Flask

Testing in Flask

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FSND C2 L4 A02 Testing In Flask

Flask Testing Summary

Unittest Flask Key Structures

As we just saw, all of your Flask application tests will follow the same format:

  1. Define the test case class for the application (or section of the application, for larger applications).
  2. Define and implement the setUp function. It will be executed before each test and is where you should initialize the app and test client, as well as any other context your tests will need. The Flask library provides a test client for the application, accessed as shown below.
  3. Define the tearDown method , which is implemented after each test. It will run as long as setUp executes successfully, regardless of test success.
  4. Define your tests. All should begin with "test_" and include a doc string about the purpose of the test. In defining the tests, you will need to:
    1. Get the response by having the client make a request
    2. Use self.assertEqual to check the status code and all other relevant operations.
  5. Run the test suite , by running python test_file_name.py from the command line.

Here's that same code (from the notebook above), for your reference: 

class AppNameTestCase(unittest.TestCase):
    """This class represents the ___ test case"""

    def setUp(self):
        """Executed before each test. Define test variables and initialize app."""
        self.client = app.test_client
        pass

    def tearDown(self):
        """Executed after reach test"""
        pass

    def test_given_behavior(self):
        """Test _____________ """
        res = self.client().get('/')

        self.assertEqual(res.status_code, 200)

# Make the tests conveniently executable
if __name__ == "__main__":
unittest.main()

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