Go语言学习11-测试

Go语言学习11-测试

单元测试

// functions.go
package testing

func square(op int) int {
	return op * op
}

// functions_test.go
package testing

import (
	"fmt"
	"github.com/stretchr/testify/assert"
	"testing"
)

func TestSquare(t *testing.T) {
	inputs := [...]int{1, 2, 3}
	expected := [...]int{1, 4, 9}
	for i := 0; i < len(inputs); i++ {
		ret := square(inputs[i])
		assert.Equal(t, expected[i], ret)
		//if ret != expected[i] {
		//	t.Errorf("input is %d, the expcted is %d, the actual %d",
		//		inputs[i], expected[i], ret)
		//}
	}
}

func TestErrorInCode(t *testing.T) {
	fmt.Println("Start")
	t.Error("Error")
	fmt.Println("End")
}

func TestFailInCode(t *testing.T) {
	fmt.Println("Start")
	t.Fatal("Error")
	fmt.Println("End")
}

内置单元测试框架

• Fail, Error: 该测试失败, 该测试继续, 其他测试继续执行

• FailNow, Fatal: 该测试失败, 该测试中止, 其他测试继续执行

• 代码覆盖率

  go test -v -cover

• 断言https://github.com/stretchr/testify

Benchmark

func BenchmarkConcatStringByAdd(b *testing.B) {
	// 与性能测试无关的代码
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		// 测试代码
	}
	b.StopTimer()
    // 与性能测试无关的代码
}

benchmark命令

go test -bench=. -benchmem

-bench=\<相关benchmark测试>

Windows下使用go test命令行时, -bench=. 应写为 -bench="."

Behavior Driven Development

“I believe that the hardest part of software projects, the most common source of project failure, is communication with the customers and users of that software. By providing a clear yet precise language to deal with domains, a DSL can help improve this communication.” – Martin Fowler.

BDD in Go

项目网站

https://github.com/smartystreets/goconvey

安装

go get -u github.com/smartystreets/goconvey/convey

启动 web ui

$GOPATH/bin/goconvey

示例

func TestSpec(t *testing.T) {
	// Only pass t into top-level Convey calls
	Convey("Given 2 even numbers", t, func() {
		a := 2
		b := 4

		Convey("When add the two numbers", func() {
			c := a + b

			Convey("Then the result is still even", func() {
				So(c%2, ShouldEqual, 0)
			})
		})
	})
}