Mocktail

Mocktail logo

Naive code generator that creates mock implementation using testify.mock.

Unlike mockery, Mocktail generates typed methods on mocks.

For an explanation of why we created Mocktail, you can read this article.

How to use

Create a file named mock_test.go inside the package that you can to create mocks.
Add one or multiple comments // mocktail:MyInterface inside the file mock_test.go.

package example

// mocktail:MyInterface

How to Install

Go Install

You can install Mocktail by running the following command:

go install github.com/traefik/mocktail@latest

Pre-build Binaries

You can use pre-compiled binaries:

To get the binary just download the latest release for your OS/Arch from the releases page
Unzip the archive.
Add mocktail in your PATH.

Notes

It requires testify >= v1.7.0

Mocktail can only generate mock of interfaces inside a module itself (not from stdlib or dependencies)

The // mocktail comments must be added to a file named mock_test.go only,
comments in other files will not be detected

Examples

package a

import (
	"context"
	"time"
)

type Pineapple interface {
	Juice(context.Context, string, Water) Water
}

type Coconut interface {
	Open(string, int) time.Duration
}

type Water struct{}

package a

import (
	"context"
	"testing"
)

// mocktail:Pineapple
// mocktail:Coconut

func TestMock(t *testing.T) {
	var s Pineapple = newPineappleMock(t).
		OnJuice("foo", Water{}).TypedReturns(Water{}).Once().
		Parent

	s.Juice(context.Background(), "", Water{})

	var c Coconut = newCoconutMock(t).
		OnOpen("bar", 2).Once().
		Parent

	c.Open("a", 2)
}

Exportable Mocks

If you need to use your mocks in external packages just add flag -e:

mocktail -e

In this case, mock will be created in the same package but in the file mock_gen.go.

johannessteu/mocktail