// Get connection to Redis, select database and if that database not empty
// then panic to prevent existing data corruption.
func dial() testRedisConn {
addr := net.JoinHostPort(testRedisHost, testRedisPort)
c, err := redis.DialTimeout("tcp", addr, 0, 1*time.Second, 1*time.Second)
if err != nil {
panic(err)
}
_, err = c.Do("SELECT", testRedisDB)
if err != nil {
c.Close()
panic(err)
}
n, err := redis.Int(c.Do("DBSIZE"))
if err != nil {
c.Close()
panic(err)
}
if n != 0 {
c.Close()
panic(errors.New("database is not empty, test can not continue"))
}
return testRedisConn{c}
}
func ExampleInt() {
c, err := dial()
if err != nil {
panic(err)
}
defer c.Close()
c.Do("SET", "k1", 1)
n, _ := redis.Int(c.Do("GET", "k1"))
fmt.Printf("%#v\n", n)
n, _ = redis.Int(c.Do("INCR", "k1"))
fmt.Printf("%#v\n", n)
// Output:
// 1
// 2
}
// Dial dials the local Redis server and selects database 9. To prevent
// stomping on real data, DialTestDB fails if database 9 contains data. The
// returned connection flushes database 9 on close.
func Dial() (redis.Conn, error) {
c, err := redis.DialTimeout("tcp", ":6379", 0, 1*time.Second, 1*time.Second)
if err != nil {
return nil, err
}
_, err = c.Do("SELECT", "9")
if err != nil {
return nil, err
}
n, err := redis.Int(c.Do("DBSIZE"))
if err != nil {
return nil, err
}
if n != 0 {
return nil, errors.New("database #9 is not empty, test can not continue")
}
return testConn{c}, nil
}