Go Continuous Testing

ct_fsnotify.go

package main

import (
	"fmt"
	"log"
	"os"
	"os/exec"
	"time"

	"github.com/fsnotify/fsnotify"
)

func main() {
	runTest()

	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		log.Fatal(err)
	}
	defer watcher.Close()

	done := make(chan bool)
	go func() {
		lastT := time.Unix(0, 0)
		for {
			select {
			case event := <-watcher.Events:
				log.Println("event:", event)
				d := time.Now().Sub(lastT).Seconds()
				if d >= 3.0 {
					runTest()
				}
				lastT = time.Now()
			case err := <-watcher.Errors:
				log.Println("error:", err)
			}
		}
	}()

	err = watcher.Add(os.Args[1])
	if err != nil {
		log.Fatal(err)
	}
	<-done
}

func runTest() {
	cmd := exec.Command("go", "test", "./...")
	outerr, err := cmd.CombinedOutput()
	if err != nil {
		fmt.Printf("%s", outerr)
		log.Println(err)
	} else {
		log.Println("ok.")
	}
}