Improve pool tests by verifying number of created connections.

commands_test.go

@@ -1303,6 +1303,9 @@ var _ = Describe("Commands", func() {
 			bLPop := client.BLPop(time.Second, "list1")
 			Expect(bLPop.Val()).To(BeNil())
 			Expect(bLPop.Err()).To(Equal(redis.Nil))
+
+			stats := client.Pool().Stats()
+			Expect(stats.Requests - stats.Hits - stats.Waits).To(Equal(uint32(1)))
 		})
 
 		It("should BRPop", func() {

pool.go

@@ -18,7 +18,8 @@ var (
 // PoolStats contains pool state information and accumulated stats.
 type PoolStats struct {
 	Requests uint32 // number of times a connection was requested by the pool
-	Waits    uint32 // number of times our pool had to wait for a connection
+	Hits     uint32 // number of times free connection was found in the pool
+	Waits    uint32 // number of times the pool had to wait for a connection
 	Timeouts uint32 // number of times a wait timeout occurred
 
 	TotalConns uint32 // the number of total connections in the pool
@@ -241,6 +242,7 @@ func (p *connPool) Get() (cn *conn, isNew bool, err error) {
 
 	// Fetch first non-idle connection, if available.
 	if cn = p.First(); cn != nil {
+		atomic.AddUint32(&p.stats.Hits, 1)
 		return
 	}
 

pool_test.go

@@ -123,6 +123,12 @@ var _ = Describe("pool", func() {
 		pool := client.Pool()
 		Expect(pool.Len()).To(Equal(1))
 		Expect(pool.FreeLen()).To(Equal(1))
+
+		stats := pool.Stats()
+		Expect(stats.Requests).To(Equal(uint32(3)))
+		Expect(stats.Hits).To(Equal(uint32(2)))
+		Expect(stats.Waits).To(Equal(uint32(0)))
+		Expect(stats.Timeouts).To(Equal(uint32(0)))
 	})
 
 	It("should reuse connections", func() {
@@ -135,6 +141,12 @@ var _ = Describe("pool", func() {
 		pool := client.Pool()
 		Expect(pool.Len()).To(Equal(1))
 		Expect(pool.FreeLen()).To(Equal(1))
+
+		stats := pool.Stats()
+		Expect(stats.Requests).To(Equal(uint32(100)))
+		Expect(stats.Hits).To(Equal(uint32(99)))
+		Expect(stats.Waits).To(Equal(uint32(0)))
+		Expect(stats.Timeouts).To(Equal(uint32(0)))
 	})
 
 	It("should unblock client when connection is removed", func() {

pubsub.go

@@ -245,10 +245,11 @@ func (c *PubSub) Receive() (interface{}, error) {
 	return c.ReceiveTimeout(0)
 }
 
-// ReceiveMessage returns a message or error. It automatically
-// reconnects to Redis in case of network errors.
+// ReceiveMessage returns a Message or error ignoring Subscription or Pong
+// messages. It automatically reconnects to Redis Server and resubscribes
+// to channels in case of network errors.
 func (c *PubSub) ReceiveMessage() (*Message, error) {
-	var errNum int
+	var errNum uint
 	for {
 		msgi, err := c.ReceiveTimeout(5 * time.Second)
 		if err != nil {
@@ -260,11 +261,10 @@ func (c *PubSub) ReceiveMessage() (*Message, error) {
 			if errNum < 3 {
 				if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
 					err := c.Ping("")
-					if err == nil {
-						continue
-					}
+					if err != nil {
 						Logger.Printf("PubSub.Ping failed: %s", err)
 					}
+				}
 			} else {
 				// 3 consequent errors - connection is bad
 				// and/or Redis Server is down.

pubsub_test.go

@@ -33,12 +33,6 @@ var _ = Describe("PubSub", func() {
 		Expect(err).NotTo(HaveOccurred())
 		defer pubsub.Close()
 
-		n, err := client.Publish("mychannel1", "hello").Result()
-		Expect(err).NotTo(HaveOccurred())
-		Expect(n).To(Equal(int64(1)))
-
-		Expect(pubsub.PUnsubscribe("mychannel*")).NotTo(HaveOccurred())
-
 		{
 			msgi, err := pubsub.ReceiveTimeout(time.Second)
 			Expect(err).NotTo(HaveOccurred())
@@ -48,6 +42,18 @@ var _ = Describe("PubSub", func() {
 			Expect(subscr.Count).To(Equal(1))
 		}
 
+		{
+			msgi, err := pubsub.ReceiveTimeout(time.Second)
+			Expect(err.(net.Error).Timeout()).To(Equal(true))
+			Expect(msgi).To(BeNil())
+		}
+
+		n, err := client.Publish("mychannel1", "hello").Result()
+		Expect(err).NotTo(HaveOccurred())
+		Expect(n).To(Equal(int64(1)))
+
+		Expect(pubsub.PUnsubscribe("mychannel*")).NotTo(HaveOccurred())
+
 		{
 			msgi, err := pubsub.ReceiveTimeout(time.Second)
 			Expect(err).NotTo(HaveOccurred())
@@ -66,11 +72,8 @@ var _ = Describe("PubSub", func() {
 			Expect(subscr.Count).To(Equal(0))
 		}
 
-		{
-			msgi, err := pubsub.ReceiveTimeout(time.Second)
-			Expect(err.(net.Error).Timeout()).To(Equal(true))
-			Expect(msgi).NotTo(HaveOccurred())
-		}
+		stats := client.Pool().Stats()
+		Expect(stats.Requests - stats.Hits - stats.Waits).To(Equal(uint32(2)))
 	})
 
 	It("should pub/sub channels", func() {
@@ -128,16 +131,6 @@ var _ = Describe("PubSub", func() {
 		Expect(err).NotTo(HaveOccurred())
 		defer pubsub.Close()
 
-		n, err := client.Publish("mychannel", "hello").Result()
-		Expect(err).NotTo(HaveOccurred())
-		Expect(n).To(Equal(int64(1)))
-
-		n, err = client.Publish("mychannel2", "hello2").Result()
-		Expect(err).NotTo(HaveOccurred())
-		Expect(n).To(Equal(int64(1)))
-
-		Expect(pubsub.Unsubscribe("mychannel", "mychannel2")).NotTo(HaveOccurred())
-
 		{
 			msgi, err := pubsub.ReceiveTimeout(time.Second)
 			Expect(err).NotTo(HaveOccurred())
@@ -156,6 +149,22 @@ var _ = Describe("PubSub", func() {
 			Expect(subscr.Count).To(Equal(2))
 		}
 
+		{
+			msgi, err := pubsub.ReceiveTimeout(time.Second)
+			Expect(err.(net.Error).Timeout()).To(Equal(true))
+			Expect(msgi).NotTo(HaveOccurred())
+		}
+
+		n, err := client.Publish("mychannel", "hello").Result()
+		Expect(err).NotTo(HaveOccurred())
+		Expect(n).To(Equal(int64(1)))
+
+		n, err = client.Publish("mychannel2", "hello2").Result()
+		Expect(err).NotTo(HaveOccurred())
+		Expect(n).To(Equal(int64(1)))
+
+		Expect(pubsub.Unsubscribe("mychannel", "mychannel2")).NotTo(HaveOccurred())
+
 		{
 			msgi, err := pubsub.ReceiveTimeout(time.Second)
 			Expect(err).NotTo(HaveOccurred())
@@ -190,11 +199,8 @@ var _ = Describe("PubSub", func() {
 			Expect(subscr.Count).To(Equal(0))
 		}
 
-		{
-			msgi, err := pubsub.ReceiveTimeout(time.Second)
-			Expect(err.(net.Error).Timeout()).To(Equal(true))
-			Expect(msgi).NotTo(HaveOccurred())
-		}
+		stats := client.Pool().Stats()
+		Expect(stats.Requests - stats.Hits - stats.Waits).To(Equal(uint32(2)))
 	})
 
 	It("should ping/pong", func() {
@@ -277,6 +283,9 @@ var _ = Describe("PubSub", func() {
 		Expect(msg.Payload).To(Equal("hello"))
 
 		Eventually(done).Should(Receive())
+
+		stats := client.Pool().Stats()
+		Expect(stats.Requests - stats.Hits - stats.Waits).To(Equal(uint32(2)))
 	})
 
 	expectReceiveMessageOnError := func(pubsub *redis.PubSub) {
@@ -305,6 +314,9 @@ var _ = Describe("PubSub", func() {
 		Expect(msg.Payload).To(Equal("hello"))
 
 		Eventually(done).Should(Receive())
+
+		stats := client.Pool().Stats()
+		Expect(stats.Requests - stats.Hits - stats.Waits).To(Equal(uint32(2)))
 	}
 
 	It("Subscribe should reconnect on ReceiveMessage error", func() {