Add the task service. Ready to tidy the go modules.

code/test/cron_test.go

@@ -0,0 +1,18 @@
+package test
+
+import (
+	"github.com/robfig/cron/v3"
+	"testing"
+)
+
+func TestValidateCron(t *testing.T) {
+
+	spec := "*/1 * * * * ?"
+	_, err := cron.Parse(spec)
+	if err != nil {
+		t.Error(err)
+	} else {
+		t.Logf("%s passed\n", spec)
+	}
+
+}

code/test/main_test.go

@@ -31,7 +31,7 @@ func TestCron(t *testing.T) {
 	err := c.AddFunc(spec, func() {
 		i++
 		log.Println("cron running:", i)
-		if i == 2 {
+		if i == 3 {
 			panic("intent to panic.")
 		}
 	})