Go语言基础单元测试与性能测试示例详解

//add.go
package cal
func Add(num1, num2 int) int {
	return num1 + num2
}
//mul.go
package cal
func Mul(num1, num2 int) int {
	return num1 * num2
}

//add_test.go
package cal
import (
	"testing"
)
func TestAdd(t *testing.T) {
	sum := Add(10, 20)
	if sum != 30 {
		t.Log("10+20=", sum)
	}
}
func TestMul(t *testing.T) {
	sum := Mul(10, 2)
	if sum != 20 {
    t.Error("10 * 2 =", sum)
	}
}

//单元测试命令行
$ go test add_test.go add.go mul.go
ok      command-line-arguments  0.072s
$ go test -v add_test.go add.go
=== RUN   TestAdd
--- PASS: TestAdd (0.00s)
=== RUN   TestMul
--- PASS: TestMul (0.00s)
PASS
ok      command-line-arguments  0.070s
//运行指定单元测试用例
$ go test -v -run TestAdd add_test.go add.go mul.go
=== RUN   TestAdd
--- PASS: TestAdd (0.00s)
PASS
ok      command-line-arguments  0.072s

  //benchmark_test.go
    package cal
    import (
	"fmt"
    "testing"
  )
    func BenchmarkHello(b *testing.B) {
    	for i := 0; i < b.N; i++ {
    		fmt.Sprintf("hello")
    	}
    }

$ go test -v -bench="." benchmark_test.go
goos: windows
goarch: amd64
BenchmarkHello-4        20000000                93.7 ns/op
PASS
ok      command-line-arguments  2.061s

$ go test -v -benchtime=2s  -bench=. benchmark_test.go
goos: windows
goarch: amd64
BenchmarkHello-4        30000000                85.1 ns/op
PASS
ok      command-line-arguments  2.714s