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go-test

Testing & Quality
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Generate deterministic Go unit tests using `testutil`, table-driven patterns, and infra mocks with ≥80% coverage.

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Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/testing/go-test-geekswamp-agent-skills/SKILL.md

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Generate Go unit tests for the provided code using Go testing best practices.

Requirements

  • Use table-driven tests for all testable functions.
  • Use mocking where appropriate:
    • Prefer testify/mock for interface dependencies.
    • Avoid real external dependencies (DB, network, filesystem).
  • Focus on test coverage, including:
    • Success cases
    • Error cases
    • Edge cases
    • Boundary conditions
  • Tests must be deterministic and translation-safe (no reliance on time, randomness, or global state unless mocked).
  • Follow idiomatic Go conventions:
    • File name: <file>_test.go
    • Test name: Test<FunctionName>
  • Always use English in test names and comments.
  • Enforce minimum package coverage of ≥80%.
  • Coverage must include:
    • At least one error path per public function (if applicable).
    • Boundary or edge cases where reasonable.

Output Expectations

  • Generate complete, compilable test code.
  • Include necessary imports.
  • Clearly separate:
    • Arrange
    • Act
    • Assert
  • Prefer readability to cleverness.
  • Generated tests should realistically achieve ≥80% coverage when executed with: go test -cover ./...

Additional Guidelines

  • Prefer small, focused tests over large monolithic ones.
  • If a function is hard to test:
    • Explain briefly why
    • Suggest a refactor (e.g., dependency injection).
  • Do not test private implementation details—test behavior.
  • Avoid snapshot-style assertions unless explicitly requested.
  • If achieving ≥ 80% coverage is not possible without testing private implementation details:
    • Explain the limitation briefly
    • Suggest a refactor (interface extraction, dependency injection)
  • Avoid fake coverage (e.g. meaningless assertions).

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