Go 學習筆記13.編寫測試

編寫測試要求

• 文件名命名 xx_test.go
• 測試函數命名 TestXxx開頭 Xxx首字母大寫
• 函數參數 *test.T 類型

需要測試的程序源碼

animal.go

package animal

import "fmt"

// Cat貓 結構體
type Cat struct {
	Name  string
	Color string
	Age   uint
}

// 一個初始化Cat的入口函數
func NewCat(name,color string,age uint) *Cat {
	return &Cat{name,color,age}
}

func (c *Cat) Sleeping() {
	fmt.Println(c.Color,"Cat",c.Name,"is sleeping")
}

func (c *Cat) Eating() {
	fmt.Println(c.Color,"Cat",c.Name,"is eating")
}

func (c *Cat) Print() {
	fmt.Print(c)
}

單元測試

animal_test.go

package animal

import "testing"

func TestCat_Sleeping(t *testing.T) {
	c := NewCat("Tom","blue",10)
	c.Sleeping()
}

func TestCat_Eating(t *testing.T) {
	c := NewCat("sinmigo","block",10)
	c.Eating()
	if c.Color == "white" {
		t.Log("Eating 測試通過")
	} else {
		t.Error("Eating 測試不通過")
	}
}

執行測試

go test -v -cover

--- PASS: TestCat_Sleeping (0.00s)
=== RUN   TestCat_Eating
block Cat sinmigo is eating
    TestCat_Eating: animal_test.go:16: Eating 測試不通過
--- FAIL: TestCat_Eating (0.00s)
FAIL
coverage: 75.0% of statements
exit status 1
FAIL    animal  1.898s

性能測試

animal_test.go

// 性能測試
func BenchmarkCat_Eating(b *testing.B) {
	c := NewCat("Tom","blue",10)

	for i :=0;i<b.N; i++ {
		c.Eating()
	}
}

執行

go test -bench=.

blue Cat Tom is sleeping
block Cat sinmigo is eating
goos: windows
goarch: amd64
pkg: animal
BenchmarkCat_Eating-8           1000000000               0.306 ns/op
PASS
ok      animal  3.062s