test-implement

name	test-implement
description	Implements React/TypeScript unit, integration, and browser E2E tests with the repository's configured runner, mocks, setup, and browser harness. Use when creating or completing frontend tests and generated test skeletons.

Test Implementation Patterns

Reference Selection

Test Type	Reference	When to Use
Unit / Integration	references/frontend.md	Implementing React component tests with the repository's configured runner and network mocking layer
E2E	references/e2e.md	Implementing browser-level E2E tests in the existing harness, or Playwright when the approved work introduces a harness

Common Principles

AAA Structure

All tests follow Arrange-Act-Assert:

• Arrange: Set up preconditions and inputs
• Act: Execute the behavior under test
• Assert: Verify the expected outcome

Test Independence

• Each test runs independently without depending on other tests
• No shared mutable state between tests
• Deterministic execution — mock random and time dependencies

Naming

• Test names describe expected behavior from user perspective
• One test verifies one behavior