Writing test cases

Now let's expand the test_populate_tasks() method seen in our initial skeleton. The simplest tests we can write, run some code from the tested object, query for a result to verify, and then use an assert to compare with an expected result.

The test_populate_tasks() method will test the do_populate_tasks() Todo method. Since our setup made sure we have two open Todos, after running it we expect the wizard task_ids to be referencing these two records.

# class TestWizard(TransactionCase): 
    def test_populate_tasks(self): 
        "Populate tasks buttons should add two tasks" 
        self.wizard.do_populate_tasks() 
        count = len(self.wizard.task_ids) 
        self.assertEqual(count, 2, 'Wrong number of populated 
        tasks') 

The docstring, at the first line of the ...

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