Restructure unit tests into separate Arrange, Act, and Assert sections.
npx skills add https://github.com/yanko-belov/code-craft --skill aaa-pattern
Please help me install this Agent Skill. Skill: aaa-pattern Source: https://github.com/yanko-belov/code-craft/tree/main/skills/aaa-pattern Command: npx skills add https://github.com/yanko-belov/code-craft --skill aaa-pattern
Tests often mix Arrange, Act, and Assert, making failures hard to diagnose and refactors risky. The AAA pattern enforces a clear, repeatable structure that isolates setup, action, and verification.
To start using AAA pattern in your tests, restructure an existing test by placing setup code under Arrange, the operation under Act, and the expected results under Assert, then rename the test to reflect the behavior being verified.
High-intent search queries and answers about installing and using this skill.
The AAA pattern enforces a strict Arrange-Act-Assert structure to keep unit tests readable and debuggable. It requires a single Act per test, explicit test naming, and clear separation of Arrange, Act, and Assert stages to isolate setup, action, and verification.
Arrange-Act-Assert is a testing structure that isolates setup, action, and verification into distinct sections. By enforcing a single Act per test and explicit naming, it creates a clear, repeatable format that makes test failures easier to diagnose and refactors less risky.
Yes, the AAA pattern applies cross-framework across popular testing tools like Jest, Mocha, and PyTest. It standardizes unit test quality by enforcing a single Act per test and clear separation of Arrange, Act, and Assert stages regardless of the framework or language.
To refactor a test with multiple actions, place setup code under Arrange, the single operation under Act, and expected results under Assert. Converting intertwined actions into distinct AAA sections requires a single Act per test and explicit naming to reduce cognitive load and speed debugging.
Enforce a single Act per test when unit tests become unclear or mixed with multiple actions and assertions. This strict Arrange-Act-Assert separation isolates the operation, making test failures easier to diagnose and reducing the risk during code refactoring.
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anyulledStructure unit tests into Arrange, Act, and Assert phases.
