calculator_test_2.go

//calculator_test.go
package main

import "testing"

func TestAdd(t *testing.T) {
	if result, _ := AddFunc(1,2); result != 3 {
		t.Error("Test failed")
	}
}

func TestAddWrong(t *testing.T) {
	if result, _ := AddFunc(1,2); result == 4 {
		t.Error("1 + 2 should not be 4")
	}
}

func TestAddEmptyInput(t *testing.T) {
	if _, err := AddFunc(); err == nil {
		t.Error("Empty input can not be accepted")
	}
}