golang-testing

Table-driven tests in Go use a slice of structs to define multiple input scenarios and expected outputs succinctly. You iterate through these cases to execute subtests, ensuring comprehensive coverage without duplicating test logic.

Testing HTTP handlers in Go is best done using the httptest package to validate web endpoints. It provides utilities to create mock requests and response recorders, allowing you to verify handler behavior and status codes.

You measure performance with Go benchmarks by creating functions prefixed with Benchmark and using the B pointer. Running the go test command with the -bench flag executes these tests to measure and report code execution time.

Yes, you can detect data races in Go code by running the race detector. Execute your tests with the -race flag during the go test command to identify concurrent access issues and unsafe memory operations.

Go supports fuzzing for edge case discovery through native fuzz tests. This mechanism feeds randomized inputs to your functions to uncover panics and unexpected behavior, improving reliability without external dependencies beyond the Go toolchain.

You structure subtests in Go using the t.Run method within your test functions. This allows grouping related test cases, isolating failures, and running specific scenarios individually while maintaining a clean test hierarchy.