Go 语言进阶单元测试示例详解

import "testing"
func TestHelloTom(t *testing.T) {
    output := HelloTom()
    expectOutPut := "Tom"
    if output != expectOutPut {
        t.Errorf("Expected %s do not match actual %s", expectOutPut, output)
    }
}
func HelloTom() string {
    return "Jerry"
}

--- FAIL: TestHelloTom (0.00s)
helloTom_test.go:9: Expected Tom do not match actual Jerry
FAIL
exit status 1
FAIL    learning/mytesting      0.496s

func TestHelloTom(t *testing.T) {
    output := HelloTom()
    expectOutPut := "Tom"
    assert.Equal(t, expectOutPut, output)
}

// judgepass.go
func JudgePassLine(score int16) bool {
    if score >= 16 {
        return true
    }
    return false
}
// judgepass_test.go
func TestJudgePassLineTrue(t *testing.T) {
    isPass := JudgePassLine(70)
    assert.Equal(t, true, isPass)
}

func Patch(target, replacement interface{}) *PatchGuard {
    t := reflect.ValueOf(target)
    r := reflect.ValueOf(replacement)
    patchValue(t, r)
    return &PatchGuard{t, r}
}

func Unpatch(target interface{}) bool {
    return unpatchValue(reflect.ValueOf(target))
}

func TestProcessFirstLineWithMock(t *testing.T) {
    monkey.Patch(ReadFirstLine, func() string {
        return "line110"
    })
    defer monkey.Unpatch(ReadFirstLine)
    line := ProcessFirstLine()
    assert.Equal(t, "line000", line)
}
func ReadFirstLine() string {
    open, err := os.Open("log")
    defer open.Close()
    if err != nil {
        return ""
    }
    scanner := bufio.NewScanner(open)
    for scanner.Scan() {
        return scanner.Text()
    }
    return ""
}
func ProcessFirstLine() string {
    line := ReadFirstLine()
    destLine := strings.ReplaceAll(line, "11", "00")
    return destLine
}

var ServerIndex [10]int
func InitServerIndex() {
    for i := 0; i < 10; i++ {
        ServerIndex[i] = i + 100
    }
}
func Select() int {
    return ServerIndex[rand.Intn(10)]
}
func BenchmarkSelect(b *testing.B) {
    InitServerIndex()
    b.ResetTimer()
    for i := 0; i < b.N; i++ {
        Select()
    }
}
func BenchmarkSelectParallel(b *testing.B)  {
    InitServerIndex()
    b.ResetTimer()
    b.RunParallel(func (pb *testing.PB)  {
        for pb.Next() {
            Select()
        }
    })
}