Author: 👤 Harry J.W. Percival

Type: #book

Genres: #comp-sci #webdev

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Test Driven Development with Python

1 Getting Django Set Up Using a Functional Test

• The first step of Test Driven Development
• First Django web app test

2 Extending our Functional Test Using the unittest Module

• Functional tests
• Using comments
• Writing a User Story for functional testing

3 Testing a Simple Home Page with Unit Tests

• Unit Tests vs Functional Tests
• TDD workflow
• Django's workflow
• django.urls resolve function

4 What Are We Doing with All These Tests? (And, Refactoring)

• Why trivial tests are important
• Testing template used
• Don't change functionality while refactoring

5 Saving User Input: Testing the Database

• Debugging unexpected functional test errors
• Testing a POST request
• What are Django migrations?
• Creating a new database entry without calling save()
• The purpose of a view function

6 Improving Functional Tests: Ensuring Isolation and Removing Voodoo Sleeps

• Using LiveServerTestCase for Django functional tests
• Accessing LiveServerTestCase server with selenium
• Ensure test isolation

7 Working Incrementally

• Big Design Up Front vs Agile and Minimum Viable Application
• Testing Django view context items

8 Prettification: Layout and Styling, and What to Test About It

• Testing aesthetics
• Getting web element position and size
• Loading static files
• Using collectstatic

9 Testing Deployment Using a Staging Site

• Setting up a staging server for tests

11 Automating Deployment with Fabric

• Using fabric to automate deployment

12 Splitting Our Tests into Multiple Files, and a Generic Wait Helper

• Generic explicit wait helper function for testing
• Put unit tests in a tests directory

13 Validation at the Database Layer

• Test that errors are properly raised
• Django's reverse function
• Defining get_absolute_url for a Django model
• Validate data at the lowest possible level, ideally at the database

14 A Simple Form

• A complex Django view is a code smell
• Creating Django ModelForms
• Testing forms
• Testing that a form is used in a view
• Using grep in the command line
• Using a Django form in a view
• Django forms and HTML5

15 More Advanced Forms

• View testing checklist

16 Dipping Our Toes, Very Tentatively, into JavaScript

• Setting up a JavaScript test runner
• Using jQuery

18 User Authentication, Spiking, and De-Spiking

• Testing sent emails
• Creating a custom user model
• Driving Django models with TDD

19 Using Mocks to Test External Dependencies or Reduce Duplication

• Mocking sending an email
• What is a Mock object?
• Using @patch for mocking

20 Test Fixtures and a Decorator for Explicit Waits

• How do Django sessions work?
• Creating a @wait decorator

22 Finishing "My Lists": Outside-In TDD

• Logging in a user through the Django test client
• Outside-In testing

23 Test Isolation, and "Listening to Your Tests"

• Don't work on lower level code with failing tests in the upper layers
• Use helper methods to keep ORM calls in the model layer

26 Fast Tests, Slow Tests, and Hot Lava

• When to use isolated tests vs integrated tests