Make redis cache timeout not trivial.

- Instead of using HASH for all the caches, use HASH + normal KEYs.
- HASH being used as a collection of all KEYs, this is useful when
  application wants to clear all keys.

cache/redis/redis_test.go

@@ -0,0 +1,81 @@
+// Beego (http://beego.me/)
+
+// @description beego is an open-source, high-performance web framework for the Go programming language.
+
+// @link        http://github.com/astaxie/beego for the canonical source repository
+
+// @license     http://github.com/astaxie/beego/blob/master/LICENSE
+
+// @authors     astaxie
+
+package cache
+
+import (
+	"testing"
+	"time"
+
+	"github.com/beego/redigo/redis"
+
+	"github.com/astaxie/beego/cache"
+)
+
+func TestRedisCache(t *testing.T) {
+        bm, err := cache.NewCache("redis", `{"conn": "127.0.0.1:6379"}`)
+	if err != nil {
+		t.Error("init err")
+	}
+	if err = bm.Put("astaxie", 1, 10); err != nil {
+		t.Error("set Error", err)
+	}
+	if !bm.IsExist("astaxie") {
+		t.Error("check err")
+	}
+
+	time.Sleep(10 * time.Second)
+
+	if bm.IsExist("astaxie") {
+		t.Error("check err")
+	}
+	if err = bm.Put("astaxie", 1, 10); err != nil {
+		t.Error("set Error", err)
+	}
+
+	if v, _ := redis.Int(bm.Get("astaxie"), err); v != 1 {
+		t.Error("get err")
+	}
+
+	if err = bm.Incr("astaxie"); err != nil {
+		t.Error("Incr Error", err)
+	}
+
+        if v, _ := redis.Int(bm.Get("astaxie"), err); v != 2 {
+		t.Error("get err")
+	}
+
+	if err = bm.Decr("astaxie"); err != nil {
+		t.Error("Decr Error", err)
+	}
+
+	if v, _ := redis.Int(bm.Get("astaxie"), err); v != 1 {
+		t.Error("get err")
+	}
+	bm.Delete("astaxie")
+	if bm.IsExist("astaxie") {
+		t.Error("delete err")
+	}
+	//test string
+	if err = bm.Put("astaxie", "author", 10); err != nil {
+		t.Error("set Error", err)
+	}
+	if !bm.IsExist("astaxie") {
+		t.Error("check err")
+	}
+
+	if v, _ := redis.String(bm.Get("astaxie"), err); v != "author" {
+		t.Error("get err")
+	}
+        // test clear all
+        if err = bm.ClearAll(); err != nil {
+                t.Error("clear all err")
+        }
+}