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Django 1.1 Testing and Debugging

You're reading from   Django 1.1 Testing and Debugging Building rigorously tested and bug-free Django applications

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Product type Paperback
Published in Apr 2010
Publisher Packt
ISBN-13 9781847197566
Length 436 pages
Edition 1st Edition
Languages
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Toc

Table of Contents (17) Chapters Close

Django 1.1 Testing and Debugging
Credits
About the Author
About the Reviewer
Preface
1. Django Testing Overview FREE CHAPTER 2. Does This Code Work? Doctests in Depth 3. Testing 1, 2, 3: Basic Unit Testing 4. Getting Fancier: Django Unit Test Extensions 5. Filling in the Blanks: Integrating Django and Other Test Tools 6. Django Debugging Overview 7. When the Wheels Fall Off: Understanding a Django Debug Page 8. When Problems Hide: Getting More Information 9. When You Don't Even Know What to Log: Using Debuggers 10. When All Else Fails: Getting Outside Help 11. When it's Time to Go Live: Moving to Production Index

Understanding the sample unit test


The unit test is the first test contained in tests.py, which begins:

""" 
This file demonstrates two different styles of tests (one doctest and one unittest). These will both pass when you run "manage.py test". 

Replace these with more appropriate tests for your application. 
"""

from django.test import TestCase 

class SimpleTest(TestCase): 
    def test_basic_addition(self): 
        """ 
        Tests that 1 + 1 always equals 2. 
        """ 
        self.failUnlessEqual(1 + 1, 2) 

The unit test starts by importing TestCase from django.test. The django.test.TestCase class is based on Python's unittest.TestCase, so it provides everything from the underlying Python unittest.TestCase plus features useful for testing Django applications. These Django extensions to unittest.TestCase will be covered in detail in Chapter 3, Testing 1, 2, 3: Basic Unit Testing and Chapter 4, Getting Fancier: Django Unit Test Extensions. The sample unit test here doesn't actually need any of that support, but it does not hurt to base the sample test case on the Django class anyway.

The sample unit test then declares a SimpleTest class based on Django's TestCase, and defines a test method named test_basic_addition within that class. That method contains a single statement:

self.failUnlessEqual(1 + 1, 2)

As you might expect, that statement will cause the test case to report a failure unless the two provided arguments are equal. As coded, we'd expect that test to succeed. We'll verify that later in this chapter, when we get to actually running the tests. But first, let's take a closer look at the sample doctest.

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Django 1.1 Testing and Debugging
Published in: Apr 2010
Publisher: Packt
ISBN-13: 9781847197566
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