golang mock interface 写单测

1 使用github.com/vektra/mockery

目录结构：

.
├── mock_stringer
│   └── Stringer.go
├── stringer.go
└── stringer_test.go

1 directory, 3 files

go:generatego generate

package stringer

//go:generate mockery -outpkg mock_stringer -output ./mock_stringer -name Stringer
type Stringer interface {
    String(int) string
}

stringer_test.go

package stringer

import (
    "testing"

    "github.com/wncbb/mockery_pg/stringer/mock_stringer"
)

func TestStringer(t *testing.T) {
    m := mock_stringer.Stringer{}
    m.On("String", 12).Return("ThisIs12")

    t.Logf("m.String(12): %s", m.String(12))
}

2 使用github.com/golang/mock/gomock

目录结构：

.
└── stringer
    ├── mock_stringer
    │   └── mock_stringer.go
    ├── stringer.go
    └── stringer_test.go

2 directories, 3 files

go:generatego generate

package stringer

//go:generate mockgen -destination=./mock_stringer/mock_stringer.go -package=mock_stringer github.com/wncbb/gomock_pg/stringer Stringer
type Stringer interface {
    String(int) string
}

stringer_test.go

package stringer

import (
    "testing"

    "github.com/golang/mock/gomock"
    "github.com/wncbb/gomock_pg/stringer/mock_stringer"
)

func TestStringer(t *testing.T) {
    ctrl := gomock.NewController(t)
    defer ctrl.Finish()

    m := mock_stringer.NewMockStringer(ctrl)
    m.EXPECT().String(12).Return("ThisIs12").Times(1)

    t.Logf("m.String(12): %s", m.String(12))
}