golang-testing

Table-driven tests in Go use a slice of structs to define multiple input scenarios and expected outputs concisely. You iterate over these cases, executing test logic against each entry to ensure comprehensive coverage without duplicating test functions.

Go parallel subtests are executed by calling t.Parallel() within a t.Run block. This allows multiple subtests to run concurrently, significantly improving test execution speed and providing faster feedback on your test suite.

Fuzz testing in Go is implemented using the testing.F type to automatically generate randomized inputs. This validates robustness by continuously feeding edge-case data into your functions to uncover unexpected panics and security vulnerabilities.

Test coverage in a Go codebase is measured using the go test -cover command. Improving test coverage involves writing additional table-driven tests and subtests to ensure all code branches and execution paths are fully validated.

Performance benchmarks in Go are added by creating functions prefixed with Benchmark that accept a *testing.B parameter. They execute code repeatedly using a loop over b.N to accurately measure execution time and memory allocation performance.