Go language unit test 4: go language uses gomonkey to test functions or methods

One , Libraries used for installation

1,gomonkey The address of the code :

https://github.com/agiledragon/gomonkey

2, Install... From the command line gomonkey

[email protected]:~$ go get -u github.com/agiledragon/gomonkey

3,goconvey Code address of the library

https://github.com/smartystreets/goconvey

4, Install... From the command line

[email protected]:~$ go get -u github.com/smartystreets/goconvey

explain ： Liu Hongdi's go The forest is a focus golang The blog of ,
           Address ：https://blog.csdn.net/weixin_43881017

explain ： author : Liu Hongdi mailbox : [email protected]

Two , Information about the demonstration project

1, Project address ：

https://github.com/liuhongdi/unittest03

2, Functional specifications ： Demonstrates the use of gomonkey Pile driving when the library is tested in the project

3, Project structure ： Pictured :

3、 ... and ,go Code instructions

1,model/user.go

package model

type MyUser struct {
	name string
}

// Return the user's name
func (s *MyUser) GetUserName() string {
	return s.name
}

2,main.go

package main

// Define an addition method 
func Add(a, b int) int {
	return a + b
}

// Define methods , Returns an integer 2 times 
func GetDouble(a int) int {
	return Add(a,a)
}

3,main_test.go

package main

import (
	. "github.com/agiledragon/gomonkey"
	"github.com/liuhongdi/unittest03/model"
	. "github.com/smartystreets/goconvey/convey"
	"reflect"
	"testing"
)



// test double, by add Functions 1
func TestDoubleRight(t *testing.T) {
	patch := ApplyFunc(Add, func(a,b int) int {
		return a * 2
	})
	defer patch.Reset()
	//fmt.Println(GetDouble(2))
	Convey("test 2 x 2", t, func() {
		So(GetDouble(2), ShouldEqual,4)
	})
}

//add Stake of function 
func addstub(a,b int) int {
	return a*3
}

// test double, by add Functions 2
func TestDoubleError(t *testing.T) {
	patch := ApplyFunc(Add, addstub)
	defer patch.Reset()
	//fmt.Println(GetDouble(2))
	Convey("test 2 x 2", t, func() {
		So(GetDouble(2), ShouldEqual,4)
	})
}

// Test the method of piling 1, Back to right 
func TestMethodRight(t *testing.T) {
	var temp *model.MyUser
	patch := ApplyMethod(reflect.TypeOf(temp), "GetUserName", func(_ *model.MyUser) string {
		return "hello,world!"
	})
	defer patch.Reset()
	Convey("GetUserName Will return :hello,world!", t, func() {
		var user *model.MyUser
		user = new(model.MyUser)
		So(user.GetUserName(), ShouldEqual, "hello,world!")
	})
}

// Test the method of piling 2, Returns an error 
func TestMethodError(t *testing.T) {
	var temp *model.MyUser
	patch := ApplyMethod(reflect.TypeOf(temp), "GetUserName", func(_ *model.MyUser) string {
		return "hello, Lao Liu !"
	})
	defer patch.Reset()
	Convey("GetUserName Will return :hello,world!", t, func() {
		var user *model.MyUser
		user = new(model.MyUser)
		So(user.GetUserName(), ShouldEqual, "hello,world!")
	})
}

Four , The test results

Perform the test :

[email protected]:/data/go/unittest03# go test -v ./... -gcflags "all=-N -l"

Be careful : Add parameter :-gcflags "all=-N -l"

Otherwise, piling may not take effect

return :

5、 ... and , View the library used :

module github.com/liuhongdi/unittest03

go 1.15

require (
	github.com/smartystreets/goconvey v1.6.4
	github.com/agiledragon/gomonkey v2.0.2+incompatible
)