nxt_unit

NxtUnit

NxtUnit is an automatically unit test generation application for Go, you can compile it as the binary package and run it

Table of Contents

• Introduction
• How To Use
• Generation Failure
• License

Introduction

Automated unit test generation has been studied for a long time and prior research has focused on dynamically compiled or dynamically typed programming languages such as Java and Python. However, few of the existing tools support Go, which is a popular statically compiled and typed programming language in the industry for server application development and used extensively in our production environment

NxtUnit is the tool that can automatically generate the unit test for Go. For example, given the original code

func Example (input1 int, input2 int) 
int {
   if input1*input2 > 9 
   {
      return input1
   }
   switch input1 
   {
   case 20:
      input1 = +RPCCallee1(input2)
   case 40:
      input1 = +RPCCallee1(input2)
   }
   return input1
}

it can generate the unit test like below

import (
   testing "testing"
   gomonkeyv2 "github.com/agiledragon/gomonkey/v2"
   convey "github.com/smartystreets/goconvey/convey" )
func TestExampleFunction_URRDGU(t *testing.T) {
   type Args struct {
      Input1 int,  Input2 int
   }
   type test struct {
      Name            string
      Args            Args
      Want            int
      Mocks           func()
      MonkeyOutputMap map[string][]interface{}
   }
   tests := []test{test{
      Name: "Alice King",
      Args: Args{
         Input1: 20, Input2: 4,
      },
      Want:            20,
      Mocks:           func() {},
      MonkeyOutputMap: map[string][]interface{}{"RPCCallee1": []interface{}{10}},
   }, test{
      Name: "Eason King",
      Args: Args{
         Input1: 7, Input2: 1,
      },
      Want:            7,
      Mocks:           func() {},
      MonkeyOutputMap: map[string][]interface{}{"RPCCallee1": []interface{}{11}},
   }}
   for _, tt := range tests {
      convey.Convey(tt.Name, t, func() {
         tt.Mocks()
         PTNFTPatch := gomonkeyv2.ApplyFuncReturn(RPCCallee1, tt.MonkeyOutputMap["RPCCallee1"][0])
         defer PTNFTPatch.Reset()
    if got := ExampleFunction(tt.Args.Input1, tt.Args.Input2); got != tt.Want {
            convey.So(got, convey.ShouldResemble, tt.Want)
         }
      })
   }
}

How To Use

Installation

go install https://github.com/bytedance/nxt_unit@latest

Explanation of the parameters

-function_name means your function name
-receiver_name means the receiver name
-receiver_is_star means whether your receiver is a pointer or not.
-usage has two version: plugin is to generate the unit test. -pluginq is to generate the template
-go is your local go path
-file_name is your absolute go path

Generate the unit test

nxt_unit -file_path=[your path] -receiver_name=Decoder -receiver_is_star=true -function_name=Decode -usage=plugin
-go=/usr/local/go/bin/go

Run generated unit test

Remenber to add go build flag: -gcflags "all=-N -l"

Generation-Failure

solutions

【panic: permission denied】if your GoVersion>=1.17 on macOS Catalina 10.15.x

1.download the tool

cd go env GOPATH git clone https://github.com/eisenxp/macos-golink-wrapper.git

2. rename the link to original_link

mv go env GOTOOLDIR/link go env GOTOOLDIR/original_link

3. copy tool to GOTOOLDIR

cp go env GOPATH/macos-golink-wrapper/link go env GOTOOLDIR/link

4. authorize link

chmod +x go env GOTOOLDIR/link

License

NxtUnit is licensed under the terms of the Apache license 2.0. See LICENSE for more information.