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文件名须以”_test.go”结尾

方法名须以”Test”打头，并且形参为 (t *testing.T)

举例：/hello_test.go

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package main
 
import (
	"testing"
	"fmt"
)
 
func TestHello(t *testing.T) {
	fmt.Println("TestHello")
}
 
func TestWorld(t *testing.T) {
	fmt.Println("TestWorld")

测试整个文件：$ go test -v hello_test.go

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=== RUN   TestHello
TestHello
--- PASS: TestHello (0.00s)
=== RUN   TestWorld
TestWorld
--- PASS: TestWorld (0.00s)
PASS
ok  	command-line-arguments	0.007s

测试单个函数：$ go test -v hello_test.go -run TestHello

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=== RUN   TestHello
TestHello
--- PASS: TestHello (0.00s)
PASS
ok  	command-line-arguments	0.008s

默认是正则表达式的形式，如果精确某个函数： $ go test -run '^TestLong$' -v

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