oliverdavies.uk/content/node.2e4827a4-0d9c-458c-86eb-d6b40f18d608.yml

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title:
  - value: 'Test, then refactor'
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      <p><a href="/daily/2024/10/19/phpunit-or-pest">Whether you prefer PHPUnit or Pest PHP</a>, or if you're coding in a different language, it's important to have automated tests - especially before you refactor any code.</p>

      <p>Before you refactor, you want to have passing tests that you're confident cover all the required functionality.</p>

      <p>When you finish refactoring, the tests should still pass.</p>

      <p>Then you know the functionality is the same and the code still works after it's been refactored.</p>

      <p>If you don't have tests, how do you know everything still works, or how likely are you to do the refactor at all?</p>

              
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      <p><a href="/daily/2024/10/19/phpunit-or-pest">Whether you prefer PHPUnit or Pest PHP</a>, or if you're coding in a different language, it's important to have automated tests - especially before you refactor any code.</p>

      <p>Before you refactor, you want to have passing tests that you're confident cover all the required functionality.</p>

      <p>When you finish refactoring, the tests should still pass.</p>

      <p>Then you know the functionality is the same and the code still works after it's been refactored.</p>

      <p>If you don't have tests, how do you know everything still works, or how likely are you to do the refactor at all?</p>

              
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