testing module with mock redis connection and command

Cargo.toml

@@ -68,6 +68,7 @@ script = ["sha1"]
 tls = ["native-tls"]
 async-std-comp = ["aio", "async-std"]
 async-std-tls-comp = ["async-std-comp", "async-native-tls", "tls"]
+testing = ["futures"]
 tokio-comp = ["aio", "tokio", "tokio/net"]
 tokio-native-tls-comp = ["tls", "tokio-native-tls"]
 connection-manager = ["arc-swap", "futures", "aio"]

src/lib.rs

@@ -438,6 +438,9 @@ mod r2d2;
 #[cfg_attr(docsrs, doc(cfg(feature = "streams")))]
 pub mod streams;
 
+#[cfg(feature = "testing")]
+pub mod testing;
+
 mod client;
 mod cmd;
 mod commands;