Flask Framework Cookbook - Second Edition

How to do it...

Let's write our first test case:

1. To start with, the content of the app_tests.py test file will be as follows:

import os 
from my_app import app, db 
import unittest 
import tempfile 

The preceding code describes the imports needed for this test suite. We will use unittest for writing our tests. A tempfile instance is needed to create SQLite databases on the fly.

2. All the test cases need to subclass from unitest.TestCase:

class CatalogTestCase(unittest.TestCase): 
 
    def setUp(self): 
        self.test_db_file = tempfile.mkstemp()[1] 
        app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' +            self.test_db_file 
        app.config['TESTING'] = True 
        self.app = app.test_client() 
        db.create_all() 

The preceding method is run before each test is run and creates ...