What are mock objects in Go testing?

What are mock objects in Go testing?

Mock objects are simulated objects that mimic the behavior of real objects in controlled ways, used in testing.

Why should I use mock objects instead of real ones?

Using mock objects allows you to isolate the unit of work, making tests faster and more reliable by avoiding dependencies.

Can you give me an example of how to create a mock object in Go?

Sure! You can use libraries like 'gomock' or 'testify' to create mock objects. Would you like a code example?

Yes, please provide a simple code example using 'testify'.

Here's a simple example:

package main

import (
	"github.com/stretchr/testify/mock"
)

// Define an interface
type Database interface {
	GetUser(id int) string
}

// Create a mock struct
type MockDatabase struct {
	mock.Mock
}

func (m *MockDatabase) GetUser(id int) string {
	args := m.Called(id)
	return args.String(0)
}

// In your test, you can set expectations and return values.