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