31 lines
940 B
Markdown
31 lines
940 B
Markdown
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---
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layout: pattern
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title: Arrange/Act/Assert
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folder: arrange-act-assert
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permalink: /patterns/arrange-act-assert/
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categories: Idiom
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tags:
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- Testing
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---
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## Also known as
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Given/When/Then
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## Intent
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The Arrange/Act/Assert (AAA) is a pattern for organizing unit tests.
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It breaks tests down into three clear and distinct steps:
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1. Arrange: Perform the setup and initialization required for the test.
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2. Act: Take action(s) required for the test.
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3. Assert: Verify the outcome(s) of the test.
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## Applicability
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Use Arrange/Act/Assert pattern when
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* you need to structure your unit tests so they're easier to read, maintain, and enhance.
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## Credits
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* [Arrange, Act, Assert: What is AAA Testing?](https://blog.ncrunch.net/post/arrange-act-assert-aaa-testing.aspx)
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* [Bill Wake: 3A – Arrange, Act, Assert](https://xp123.com/articles/3a-arrange-act-assert/)
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* [Martin Fowler: GivenWhenThen](https://martinfowler.com/bliki/GivenWhenThen.html)
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