Go to Learn Go

0-using-doc

godoc -http :8000

• Packages : http://localhost:8000/pkg
• Tests examples : http://localhost:8000/pkg/testing/

1-hello-world

Writing a test is just like writing a function, with a few rules

• It needs to be in a file with a name like xxx_test.go (your code file is xxx.go)
• The test function must start with the word Test
• The test function takes one argument only t *testing.T

Examples

hello.go

func Hello() string {
	return "Hello, world"
}

hello_test.go

func TestHello(t *testing.T) {
	got := Hello()
	want := "Hello, world"

	if got != want {
		t.Errorf("got %q want %q", got, want)
	}
}

In Go, we can declare function inside function. Doing that, we should use T.Helper().