Mockio

Golang library for mocking without code generation, inspired by Mockito.

Installing library

Install latest version of the library using go get command:

Bash

go get -u github.com/ovechkin-dm/mockio

Creating test

Let's create an interface that we want to mock:

Go

type Greeter interface {
    Greet(name string) string
}

Now we will use dot import to simplify the usage of the library:

Go

import (
    ."github.com/ovechkin-dm/mockio/mock"
    "testing"
)

Now we can create a mock for the Greeter interface, and test it's method Greet:

Go

func TestGreet(t *testing.T) {
    SetUp(t)
    m := Mock[Greeter]()
    WhenSingle(m.Greet("John")).ThenReturn("Hello, John!")
    if m.Greet("John") != "Hello, John!" {
        t.Fail()
    }
}

Full example

Here is the full listing for our simple test:

Go

package main

import (
    . "github.com/ovechkin-dm/mockio/mock"
    "testing"
)

type Greeter interface {
    Greet(name string) string
}

func TestGreet(t *testing.T) {
    SetUp(t)
    m := Mock[Greeter]()
    WhenSingle(m.Greet("John")).ThenReturn("Hello, John!")
    if m.Greet("John") != "Hello, John!" {
        t.Fail()
    }
}

That's it! You have created a mock for the Greeter interface without any code generation. As you can see, the library is very simple and easy to use. And no need to generate mocks for your interfaces.