Test

The core/test package contains helpers for aiding testing.

Examples

Equals

t.Run("foo equals foo", func(t *testing.T) {
    test.Equals(t, "foo", "foo")
})

Not equals

t.Run("foo does not equal foo", func(t *testing.T) {
    test.NotEquals(t, "foo", "bar")
})

Using the ErrorTypeComparer with cmp

This comparer relies on the use of the excellent go-cmp library.

As it's documentation states, it is intended to be a more powerful and safer alternative to reflect.DeepEqual for comparing whether two values are semantically equal.

See GoDoc documentation for more information.

t.Run("some error is not a test error", func(t *testing.T) {
	// some fake errors, for the purpose of this example.
	testErr := TestError{errors.New("oops")}
	someErr := errors.New("ouch")

	var e test.ErrorReporter
	opts := cmp.Options{
		test.ErrorTypeComparer,
		cmp.Reporter(&e),
	}
	if !cmp.Equal(testErr, someErr, opts) {
		fmt.Println(e.String())
	}
	// Output:
	// error type mismatch:
	// 	expected: test_test.TestError
	// 	got: *errors.errorString
})