What methods and tools are used to check and test code in Go?

In Go, the built-in package testing is used for code testing and verification. It allows writing unit tests that are run with the command go test.

Main methods and tools:

• Unit tests: created in files with the suffix _test.go. Test functions should have the signature func TestXxx(t *testing.T).
• Benchmarks: functions with the signature func BenchmarkXxx(b *testing.B) for measuring performance.
• Mocks and stubs: can be created manually or using third-party libraries to simulate dependencies.
• Code coverage: using go test -cover, you can get a report on test coverage.

Example of a simple test:

package mypackage

import "testing"

func Add(a, b int) int {
    return a + b
}

func TestAdd(t *testing.T) {
    result := Add(2, 3)
    if result != 5 {
        t.Errorf("Add(2, 3) = %d; want 5", result)
    }
}

Also, for static analysis and code quality checks, tools like golint, go vet, and staticcheck are often used.