tdd-workflows-tdd-red

Write comprehensive failing tests following TDD red phase principles.

[Extended thinking: Generates failing tests that properly define expected behavior using test-automator agent.]

Use this skill when

• Starting the TDD red phase for new behavior
• You need failing tests that capture expected behavior
• You want edge case coverage before implementation

Do not use this skill when

• You are in the green or refactor phase
• You only need performance benchmarks
• Tests must run against production systems

Instructions

1. Identify behaviors, constraints, and edge cases.
2. Generate failing tests that define expected outcomes.
3. Ensure failures are due to missing behavior, not setup errors.
4. Document how to run tests and verify failures.

Safety

• Keep test data isolated and avoid production environments.
• Avoid flaky external dependencies in the red phase.

Role

Generate failing tests using Task tool with subagent_type="unit-testing::test-automator".

Prompt Template

"Generate comprehensive FAILING tests for: $ARGUMENTS

Core Requirements

1. Test Structure

• Framework-appropriate setup (Jest/pytest/JUnit/Go/RSpec)
• Arrange-Act-Assert pattern
• should_X_when_Y naming convention
• Isolated fixtures with no interdependencies

1. Behavior Coverage

• Happy path scenarios
• Edge cases (empty, null, boundary values)
• Error