func ExampleString() {
c, err := dial()
if err != nil {
panic(err)
}
defer c.Close()
c.Do("SET", "hello", "world")
s, err := redis.String(c.Do("GET", "hello"))
fmt.Printf("%#v\n", s)
// Output:
// "world"
}
// This example implements ZPOP as described at
// http://redis.io/topics/transactions using WATCH/MULTI/EXEC and scripting.
func Example_zpop() {
c, err := dial()
if err != nil {
fmt.Println(err)
return
}
defer c.Close()
// Add test data using a pipeline.
for i, member := range []string{"red", "blue", "green"} {
c.Send("ZADD", "zset", i, member)
}
if _, err := c.Do(""); err != nil {
fmt.Println(err)
return
}
// Pop using WATCH/MULTI/EXEC
v, err := zpop(c, "zset")
if err != nil {
fmt.Println(err)
return
}
fmt.Println(v)
// Pop using a script.
v, err = redis.String(zpopScript.Do(c, "zset"))
if err != nil {
fmt.Println(err)
return
}
fmt.Println(v)
// Output:
// red
// blue
}
func TestDialURL(t *testing.T) {
for _, d := range dialErrors {
_, err := redis.DialURL(d.rawurl)
if err == nil || !strings.Contains(err.Error(), d.expectedError) {
t.Errorf("DialURL did not return expected error (expected %v to contain %s)", err, d.expectedError)
}
}
checkPort := func(network, address string) (net.Conn, error) {
if address != "localhost:6379" {
t.Errorf("DialURL did not set port to 6379 by default (got %v)", address)
}
return net.Dial(network, address)
}
c, err := redis.DialURL("redis://localhost", redis.DialNetDial(checkPort))
if err != nil {
t.Error("dial error:", err)
}
c.Close()
checkHost := func(network, address string) (net.Conn, error) {
if address != "localhost:6379" {
t.Errorf("DialURL did not set host to localhost by default (got %v)", address)
}
return net.Dial(network, address)
}
c, err = redis.DialURL("redis://:6379", redis.DialNetDial(checkHost))
if err != nil {
t.Error("dial error:", err)
}
c.Close()
// Check that the database is set correctly
c1, err := redis.DialURL("redis://:6379/8")
defer c1.Close()
if err != nil {
t.Error("Dial error:", err)
}
dbSize, _ := redis.Int(c1.Do("DBSIZE"))
if dbSize > 0 {
t.Fatal("DB 8 has existing keys; aborting test to avoid overwriting data")
}
c1.Do("SET", "var", "val")
c2, err := redis.Dial("tcp", ":6379")
defer c2.Close()
if err != nil {
t.Error("dial error:", err)
}
_, err = c2.Do("SELECT", "8")
if err != nil {
t.Error(err)
}
got, err := redis.String(c2.Do("GET", "var"))
if err != nil {
t.Error(err)
}
if got != "val" {
t.Error("DialURL did not correctly set the db.")
}
_, err = c2.Do("DEL", "var")
}