Stubbing and Mocking notes

StubbingAndMocking.md

Stubbing and Mocking workshop

Setup

Clone https://github.com/bristol-php-training/php7-phpunit-password-validator

Run composer install and then vendor/bin/phpunit. Make sure basic test works.

Exercises

Exercise 1

Provide tests and solution for the method PasswordValidator::isValid based on docblock.

Talk

Introduce password strength requirement. Look at interface.

Benefit of design to interface.

Options:

• Real
• Double
  • Stub
  • Mock
  • Spy
  • Fake

Go through why we need to do a test double:

• May not have real implementation
• Real implementation changes
• Don't know how to enter a password that scores 3 or 4.

Exercise 2

Hand written mock

• Create test mock. Include counts
• Add to existing tests
• Create a new tests

Using mock builder

• Show with minimal
• Add in full mocks
• Show problem should use stub

Introduce other concepts (check example branches)

• Stubs
• Mocks