Test Patterns

A technology-agnostic skill for writing test code following established patterns.

Test Structure

Arrange-Act-Assert (AAA)

pattern:
  arrange: "Set up test data and preconditions"
  act: "Execute the code under test"
  assert: "Verify the expected outcome"

rules:
  - "Each test has exactly one Act step"
  - "Assert only what the test name promises"
  - "Arrange should use fixtures or factories, not inline data"