go-test

Provides Go standard testing package expertise and best practices. Ensures proper table-driven test patterns, subtests organization, benchmark implementation, and test coverage strategies. Specializes in testing.T/testing.B usage, test helpers, mock interfaces, race detection, and integration testing patterns following Go conventions.Use when: writing Go test files (_test.go), implementing table-driven tests with subtests (t.Run), creating benchmark tests (testing.B), writing example tests for documentation, implementing test helpers and fixtures, mocking interfaces for unit tests, measuring code coverage with go test -cover, detecting race conditions with -race flag, or organizing integration tests in Go projects.