madflojo

$ tree -L 2
.
├── CONTRIBUTING.md
├── Dockerfile
├── LICENSE
├── Makefile
├── README.md
├── app
│   ├── app.go
│   └── app_test.go

madflojo

type Speak interface {
	SayHello() string
}

madflojo

package main

import (
	"fmt"
)

type Speak interface {
	SayHello() string
}

madflojo

type English struct{}

func (e English) SayHello() string {
	return "Hello"
}

madflojo

package main

import (
	"fmt"
)

type Speak interface {
	SayHello() string
}

madflojo

package main

import (
        "fmt"
)

type Database interface {
        Fetch(key string) (int, error)
}

madflojo

type MockDB struct {
        // FakeFetch is used to provide unique test case results
        FakeFetch func(string) (int, error)
}

func (m *MockDB) Fetch(k string) (int, error) {
        if m.FakeFetch != nil {
                return m.FakeFetch(k)
        }
        return 0, nil

madflojo

func TestIsOver9k(t *testing.T) {
        t.Run("TestOver9000", func(t *testing.T) {
                DB = &MockDB{
                        FakeFetch: func(string) (int, error) {
                                return 9001, nil
                        },
                }
                if !isOver9000() {
                        t.Errorf("Test did not return expected results")
                }

madflojo

$ tree -L 2
.
├── CONTRIBUTING.md
├── Dockerfile
├── LICENSE
├── Makefile
├── README.md
├── app
│   ├── app.go
│   ├── app_test.go

madflojo

package app

import (
	// imports go here
	"github.com/madflojo/go-quick/config"
)

// Common errors returned by this app.
var (
	ErrShutdown = fmt.Errorf("application shutdown gracefully")