feat：完善项目

lib/order.go

@@ -0,0 +1,13 @@
+package lib
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+// OrderNo 订单号
+func OrderNo() string {
+	now := time.Now()
+	return fmt.Sprintf("%s%d%05d", now.Format("20060102"), now.Unix(), rand.Intn(100000))
+}

lib/order_test.go

@@ -0,0 +1,11 @@
+package lib
+
+import "testing"
+
+func TestOrderNo(t *testing.T) {
+	i := 0
+	for i < 20 {
+		t.Log(OrderNo())
+		i++
+	}
+}