AgentSkillsCN

Test Writer

为现有代码生成测试用例

SKILL.md
--- frontmatter
argument-hint: [file or function to test]
description: Generate tests for existing code
allowed-tools: Bash, Read, Write, Glob, Grep

Generate tests for existing code.

1. Identify the testing framework

  • •Rust: built-in #[cfg(test)] + #[test], or tests/ dir for integration tests
  • •TypeScript: check for vitest/jest/playwright in package.json
  • •Python: check for pytest/unittest

2. Read the target code

Read the file/function to understand:

  • •Input types and ranges
  • •Return types and possible values
  • •Side effects
  • •Error conditions

3. Generate tests covering

  • •Happy path: Normal expected usage
  • •Edge cases: Empty input, zero, None/null, boundary values, max values
  • •Error cases: Invalid input, missing data, network failures
  • •Integration: How the function interacts with dependencies (if applicable)

4. Place tests conventionally

  • •Rust: #[cfg(test)] mod tests {} at bottom of file, or tests/ dir for integration tests
  • •TypeScript: __tests__/ or *.test.ts adjacent to source
  • •Python: tests/ directory with test_ prefix

5. Run and verify

Run the tests to verify they pass:

  • •Rust: cargo test
  • •TypeScript: npx vitest run or npx jest
  • •Python: pytest

Style guidelines

  • •Test names should describe the behavior: test_empty_input_returns_none
  • •One assertion per test when practical
  • •Use descriptive assertion messages
  • •Arrange-Act-Assert pattern