Go语言单元测试实操：基本语法、执行步骤与核心方法解析

export GO111MODULE=off
go test

package even

func Even(i int) bool {
    return i % 2 == 0
}

package even

import "testing"

func TestEven(t *testing.T) {
    if !Even(2) {
        t.Log("2 should be even!")
        t.Fail()
    }
}

func TestNotEven(t *testing.T) {
    if Even(3) {
        t.Log("3 should not be even!")
        t.Fail()
    }
}

package even

import "testing"

func TestTestingFail(t *testing.T) {
    // 第一个断言触发失败
    if Even(2) {
        t.Log("All test cases after Fail will still run")
        t.Fail()
    }

    // 第二个断言会继续执行
    if Even(2) {
        t.Log("The test after Fail will still run")
        t.Fail()
    }
}

// 相邻的测试用例也会继续执行
func TestAfterFailCase(t *testing.T) {
    if Even(2) {
        t.Log("This test case after Fail will still run")
        t.Fail()
    }
}

package even

import "testing"

func TestTestingFailNow(t *testing.T) {
    if Even(2) {
        t.Log("All test cases after FailNow will not run")
        t.FailNow() // 此处终止本函数内剩余代码
    }

    // 下面的代码永远不会被执行
    if Even(2) {
        t.Log("The test after FailNow will be skipped")
        t.FailNow()
    }
}

// 其他测试用例依然不受影响
func TestAfterFailNowCase(t *testing.T) {
    if Even(2) {
        t.Log("This test case after FailNow will still run")
        t.FailNow()
    }
}

package even

import "testing"

func TestTestingFatal(t *testing.T) {
    if Even(2) {
        t.Fatal("All test cases after FailNow will not run")
    }

    // 因上述 Fatal 导致进程在当前函数内退出，此行未执行
    if Even(2) {
        t.Fatal("The test after Fatal will not run")
    }
}

func TestAfterFatalCase(t *testing.T) {
    if Even(2) {
        t.Fatal("This test case after Fatal will still run")
    }
}