152 lines
3.3 KiB
Go
152 lines
3.3 KiB
Go
package redis_test
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import (
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"strconv"
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"sync"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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"gopkg.in/redis.v5"
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)
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var _ = Describe("Tx", func() {
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var client *redis.Client
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BeforeEach(func() {
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client = redis.NewClient(redisOptions())
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Expect(client.FlushDb().Err()).NotTo(HaveOccurred())
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})
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AfterEach(func() {
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Expect(client.Close()).NotTo(HaveOccurred())
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})
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It("should Watch", func() {
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var incr func(string) error
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// Transactionally increments key using GET and SET commands.
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incr = func(key string) error {
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err := client.Watch(func(tx *redis.Tx) error {
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n, err := tx.Get(key).Int64()
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if err != nil && err != redis.Nil {
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return err
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}
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_, err = tx.Pipelined(func(pipe *redis.Pipeline) error {
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pipe.Set(key, strconv.FormatInt(n+1, 10), 0)
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return nil
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})
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return err
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}, key)
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if err == redis.TxFailedErr {
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return incr(key)
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}
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return err
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}
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var wg sync.WaitGroup
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for i := 0; i < 100; i++ {
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wg.Add(1)
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go func() {
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defer GinkgoRecover()
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defer wg.Done()
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err := incr("key")
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Expect(err).NotTo(HaveOccurred())
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}()
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}
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wg.Wait()
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n, err := client.Get("key").Int64()
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Expect(err).NotTo(HaveOccurred())
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Expect(n).To(Equal(int64(100)))
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})
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It("should discard", func() {
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err := client.Watch(func(tx *redis.Tx) error {
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cmds, err := tx.Pipelined(func(pipe *redis.Pipeline) error {
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pipe.Set("key1", "hello1", 0)
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pipe.Discard()
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pipe.Set("key2", "hello2", 0)
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return nil
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})
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Expect(err).NotTo(HaveOccurred())
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Expect(cmds).To(HaveLen(1))
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return err
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}, "key1", "key2")
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Expect(err).NotTo(HaveOccurred())
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get := client.Get("key1")
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Expect(get.Err()).To(Equal(redis.Nil))
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Expect(get.Val()).To(Equal(""))
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get = client.Get("key2")
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Expect(get.Err()).NotTo(HaveOccurred())
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Expect(get.Val()).To(Equal("hello2"))
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})
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It("returns an error when there are no commands", func() {
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err := client.Watch(func(tx *redis.Tx) error {
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_, err := tx.Pipelined(func(*redis.Pipeline) error { return nil })
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return err
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})
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Expect(err).To(MatchError("redis: pipeline is empty"))
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v, err := client.Ping().Result()
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Expect(err).NotTo(HaveOccurred())
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Expect(v).To(Equal("PONG"))
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})
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It("should exec bulks", func() {
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const N = 20000
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err := client.Watch(func(tx *redis.Tx) error {
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cmds, err := tx.Pipelined(func(pipe *redis.Pipeline) error {
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for i := 0; i < N; i++ {
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pipe.Incr("key")
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}
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return nil
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})
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Expect(err).NotTo(HaveOccurred())
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Expect(len(cmds)).To(Equal(N))
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for _, cmd := range cmds {
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Expect(cmd.Err()).NotTo(HaveOccurred())
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}
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return err
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})
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Expect(err).NotTo(HaveOccurred())
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num, err := client.Get("key").Int64()
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Expect(err).NotTo(HaveOccurred())
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Expect(num).To(Equal(int64(N)))
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})
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It("should recover from bad connection", func() {
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// Put bad connection in the pool.
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cn, _, err := client.Pool().Get()
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Expect(err).NotTo(HaveOccurred())
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cn.SetNetConn(&badConn{})
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err = client.Pool().Put(cn)
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Expect(err).NotTo(HaveOccurred())
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do := func() error {
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err := client.Watch(func(tx *redis.Tx) error {
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_, err := tx.Pipelined(func(pipe *redis.Pipeline) error {
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pipe.Ping()
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return nil
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})
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return err
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})
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return err
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}
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err = do()
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Expect(err).To(MatchError("bad connection"))
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err = do()
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Expect(err).NotTo(HaveOccurred())
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})
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})
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