package assert

import (
	"strings"
	"testing"
)

// Equal a generic function to test equivalence between two values
// of the same type
func Equal[T comparable](t *testing.T, actual, expected T) {
	//The t.Helper() function that we’re using in the code above indicates
	//  to the Go test runner that our Equal() function is a test helper.
	// This means that when t.Errorf() is called from our Equal() function,
	// the Go test runner will report the filename and line number of the
	// code which called our Equal() function in the output.
	t.Helper()

	if actual != expected {
		t.Errorf("got: %v; want %v", actual, expected)
	}
}

func StringContains(t *testing.T, actual, expectedSubstring string) {

	t.Helper()

	if !strings.Contains(actual, expectedSubstring) {
		t.Errorf("got: %q; expected to contain %q", actual, expectedSubstring)
	}
}

func NilError(t *testing.T, actual error) {
	t.Helper()

	if actual != nil {
		t.Errorf("got: %v; expected: nil", actual)
	}
}