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server.rs
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server.rs
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use mini_redis::server;
use std::net::SocketAddr;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::net::{TcpListener, TcpStream};
use tokio::time::{self, Duration};
/// A basic "hello world" style test. A server instance is started in a
/// background task. A client TCP connection is then established and raw redis
/// commands are sent to the server. The response is evaluated at the byte
/// level.
// #[tokio::test]
// async fn key_value_get_set() {
// let addr = start_server().await;
// // Establish a connection to the server
// let mut stream = TcpStream::connect(addr).await.unwrap();
// // Get a key, data is missing
// stream
// .write_all(b"*2\r\n$3\r\nGET\r\n$5\r\nhello\r\n")
// .await
// .unwrap();
// // Read nil response
// let mut response = [0; 5];
// stream.read_exact(&mut response).await.unwrap();
// assert_eq!(b"$-1\r\n", &response);
// // Set a key
// for i in 1..10000 {
// println!("looping... {}", i);
// stream
// .write_all(b"*3\r\n$3\r\nSET\r\n$6\r\nhelloo\r\n$5\r\nworld\r\n")
// .await
// .unwrap();
// // stream
// // .write_all(b"\nSET\r\n$5\r\nhello\r\n$5\r\nworld\r\n")
// // .await
// // .unwrap();
// // Read OK
// let mut response = [0; 5];
// stream.read_exact(&mut response).await.unwrap();
// assert_eq!(b"+OK\r\n", &response);
// }
// // Get the key, data is present
// stream
// .write_all(b"*2\r\n$3\r\nGET\r\n$6\r\nhelloo\r\n")
// .await
// .unwrap();
// // Shutdown the write half
// stream.shutdown().await.unwrap();
// // Read "world" response
// let mut response = [0; 11];
// stream.read_exact(&mut response).await.unwrap();
// assert_eq!(b"$5\r\nworld\r\n", &response);
// // Receive `None`
// assert_eq!(0, stream.read(&mut response).await.unwrap());
// }
#[tokio::test]
async fn key_value_get_set() {
let addr = start_server().await;
// Establish a connection to the server
let mut stream = TcpStream::connect(addr).await.unwrap();
// Get a key, data is missing
stream
.write_all(b"*2\r\n$3\r\nGET\r\n$5\r\nhello\r\n")
.await
.unwrap();
// Read nil response
let mut response = [0; 5];
stream.read_exact(&mut response).await.unwrap();
assert_eq!(b"$-1\r\n", &response);
// Set a key
for _ in 1..10000 {
stream.write_all(b"*3\r\n$3\r").await.unwrap();
stream
.write_all(b"\nSET\r\n$6\r\nhelloo\r\n$5\r\nworld\r\n")
.await
.unwrap();
// Read OK
let mut response = [0; 5];
stream.read_exact(&mut response).await.unwrap();
assert_eq!(b"+OK\r\n", &response);
}
// Get the key, data is present
stream
.write_all(b"*2\r\n$3\r\nGET\r\n$6\r\nhelloo\r\n")
.await
.unwrap();
// Shutdown the write half
stream.shutdown().await.unwrap();
// Read "world" response
let mut response = [0; 11];
stream.read_exact(&mut response).await.unwrap();
assert_eq!(b"$5\r\nworld\r\n", &response);
// Receive `None`
assert_eq!(0, stream.read(&mut response).await.unwrap());
}
#[tokio::test]
async fn custom() {
let addr = start_server().await;
let mut stream = TcpStream::connect(addr).await.unwrap();
for _ in 1..10000 {
stream.write_all(b"*3\r\n$3\r\nSE").await.unwrap();
stream.write_all(b"T\r").await.unwrap();
stream.write_all(b"\n$5\r\nhel").await.unwrap();
// let mut s = format!("lo{}\r\n$5\r", 1.to_string());
stream.write_all(b"lo\r\n$5\r").await.unwrap();
stream.write_all(b"\nworld\r\n").await.unwrap();
// Read OK
let mut response = [0; 5];
stream.read_exact(&mut response).await.unwrap();
assert_eq!(b"+OK\r\n", &response);
println!("passed");
}
// // Get the key, data is present
// stream
// .write_all(b"*2\r\n$3\r\nGET\r\n$5\r\nhello\r\n")
// .await
// .unwrap();
// Shutdown the write half
stream.shutdown().await.unwrap();
// Read "world" response
// let mut response = [0; 11];
// stream.read_exact(&mut response).await.unwrap();
// assert_eq!(b"$5\r\nworld\r\n", &response);
// // Receive `None`
// assert_eq!(0, stream.read(&mut response).await.unwrap());
}
/// Similar to the basic key-value test, however, this time timeouts will be
/// tested. This test demonstrates how to test time related behavior.
///
/// When writing tests, it is useful to remove sources of non-determinism. Time
/// is a source of non-determinism. Here, we "pause" time using the
/// `time::pause()` function. This function is available with the `test-util`
/// feature flag. This allows us to deterministically control how time appears
/// to advance to the application.
#[tokio::test]
async fn key_value_timeout() {
tokio::time::pause();
let addr = start_server().await;
// Establish a connection to the server
let mut stream = TcpStream::connect(addr).await.unwrap();
// Set a key
stream
.write_all(
b"*5\r\n$3\r\nSET\r\n$5\r\nhello\r\n$5\r\nworld\r\n\
+EX\r\n:1\r\n",
)
.await
.unwrap();
let mut response = [0; 5];
// Read OK
stream.read_exact(&mut response).await.unwrap();
assert_eq!(b"+OK\r\n", &response);
// Get the key, data is present
stream
.write_all(b"*2\r\n$3\r\nGET\r\n$5\r\nhello\r\n")
.await
.unwrap();
// Read "world" response
let mut response = [0; 11];
stream.read_exact(&mut response).await.unwrap();
assert_eq!(b"$5\r\nworld\r\n", &response);
// Wait for the key to expire
time::advance(Duration::from_secs(1)).await;
// Get a key, data is missing
stream
.write_all(b"*2\r\n$3\r\nGET\r\n$5\r\nhello\r\n")
.await
.unwrap();
// Read nil response
let mut response = [0; 5];
stream.read_exact(&mut response).await.unwrap();
assert_eq!(b"$-1\r\n", &response);
}
#[tokio::test]
async fn pub_sub() {
let addr = start_server().await;
let mut publisher = TcpStream::connect(addr).await.unwrap();
// Publish a message, there are no subscribers yet so the server will
// return `0`.
publisher
.write_all(b"*3\r\n$7\r\nPUBLISH\r\n$5\r\nhello\r\n$5\r\nworld\r\n")
.await
.unwrap();
let mut response = [0; 4];
publisher.read_exact(&mut response).await.unwrap();
assert_eq!(b":0\r\n", &response);
// Create a subscriber. This subscriber will only subscribe to the `hello`
// channel.
let mut sub1 = TcpStream::connect(addr).await.unwrap();
sub1.write_all(b"*2\r\n$9\r\nSUBSCRIBE\r\n$5\r\nhello\r\n")
.await
.unwrap();
// Read the subscribe response
let mut response = [0; 34];
sub1.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$9\r\nsubscribe\r\n$5\r\nhello\r\n:1\r\n"[..],
&response[..]
);
// Publish a message, there now is a subscriber
publisher
.write_all(b"*3\r\n$7\r\nPUBLISH\r\n$5\r\nhello\r\n$5\r\nworld\r\n")
.await
.unwrap();
let mut response = [0; 4];
publisher.read_exact(&mut response).await.unwrap();
assert_eq!(b":1\r\n", &response);
// The first subscriber received the message
let mut response = [0; 39];
sub1.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$7\r\nmessage\r\n$5\r\nhello\r\n$5\r\nworld\r\n"[..],
&response[..]
);
// Create a second subscriber
//
// This subscriber will be subscribed to both `hello` and `foo`
let mut sub2 = TcpStream::connect(addr).await.unwrap();
sub2.write_all(b"*3\r\n$9\r\nSUBSCRIBE\r\n$5\r\nhello\r\n$3\r\nfoo\r\n")
.await
.unwrap();
// Read the subscribe response
let mut response = [0; 34];
sub2.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$9\r\nsubscribe\r\n$5\r\nhello\r\n:1\r\n"[..],
&response[..]
);
let mut response = [0; 32];
sub2.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$9\r\nsubscribe\r\n$3\r\nfoo\r\n:2\r\n"[..],
&response[..]
);
// Publish another message on `hello`, there are two subscribers
publisher
.write_all(b"*3\r\n$7\r\nPUBLISH\r\n$5\r\nhello\r\n$5\r\njazzy\r\n")
.await
.unwrap();
let mut response = [0; 4];
publisher.read_exact(&mut response).await.unwrap();
assert_eq!(b":2\r\n", &response);
// Publish a message on `foo`, there is only one subscriber
publisher
.write_all(b"*3\r\n$7\r\nPUBLISH\r\n$3\r\nfoo\r\n$3\r\nbar\r\n")
.await
.unwrap();
let mut response = [0; 4];
publisher.read_exact(&mut response).await.unwrap();
assert_eq!(b":1\r\n", &response);
// The first subscriber received the message
let mut response = [0; 39];
sub1.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$7\r\nmessage\r\n$5\r\nhello\r\n$5\r\njazzy\r\n"[..],
&response[..]
);
// The second subscriber received the message
let mut response = [0; 39];
sub2.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$7\r\nmessage\r\n$5\r\nhello\r\n$5\r\njazzy\r\n"[..],
&response[..]
);
// The first subscriber **did not** receive the second message
let mut response = [0; 1];
time::timeout(Duration::from_millis(100), sub1.read(&mut response))
.await
.unwrap_err();
// The second subscriber **did** receive the message
let mut response = [0; 35];
sub2.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$7\r\nmessage\r\n$3\r\nfoo\r\n$3\r\nbar\r\n"[..],
&response[..]
);
}
#[tokio::test]
async fn manage_subscription() {
let addr = start_server().await;
let mut publisher = TcpStream::connect(addr).await.unwrap();
// Create a subscriber
let mut sub = TcpStream::connect(addr).await.unwrap();
sub.write_all(b"*2\r\n$9\r\nSUBSCRIBE\r\n$5\r\nhello\r\n")
.await
.unwrap();
// Read the subscribe response
let mut response = [0; 34];
sub.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$9\r\nsubscribe\r\n$5\r\nhello\r\n:1\r\n"[..],
&response[..]
);
// Update subscription to add `foo`
sub.write_all(b"*2\r\n$9\r\nSUBSCRIBE\r\n$3\r\nfoo\r\n")
.await
.unwrap();
let mut response = [0; 32];
sub.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$9\r\nsubscribe\r\n$3\r\nfoo\r\n:2\r\n"[..],
&response[..]
);
// Update subscription to remove `hello`
sub.write_all(b"*2\r\n$11\r\nUNSUBSCRIBE\r\n$5\r\nhello\r\n")
.await
.unwrap();
let mut response = [0; 37];
sub.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$11\r\nunsubscribe\r\n$5\r\nhello\r\n:1\r\n"[..],
&response[..]
);
// Publish a message to `hello` and then a message to `foo`
publisher
.write_all(b"*3\r\n$7\r\nPUBLISH\r\n$5\r\nhello\r\n$5\r\nworld\r\n")
.await
.unwrap();
let mut response = [0; 4];
publisher.read_exact(&mut response).await.unwrap();
assert_eq!(b":0\r\n", &response);
publisher
.write_all(b"*3\r\n$7\r\nPUBLISH\r\n$3\r\nfoo\r\n$3\r\nbar\r\n")
.await
.unwrap();
let mut response = [0; 4];
publisher.read_exact(&mut response).await.unwrap();
assert_eq!(b":1\r\n", &response);
// Receive the message
// The second subscriber **did** receive the message
let mut response = [0; 35];
sub.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$7\r\nmessage\r\n$3\r\nfoo\r\n$3\r\nbar\r\n"[..],
&response[..]
);
// No more messages
let mut response = [0; 1];
time::timeout(Duration::from_millis(100), sub.read(&mut response))
.await
.unwrap_err();
// Unsubscribe from all channels
sub.write_all(b"*1\r\n$11\r\nunsubscribe\r\n")
.await
.unwrap();
let mut response = [0; 35];
sub.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$11\r\nunsubscribe\r\n$3\r\nfoo\r\n:0\r\n"[..],
&response[..]
);
}
// In this case we test that server Responds with an Error message if a client
// sends an unknown command
#[tokio::test]
async fn send_error_unknown_command() {
let addr = start_server().await;
// Establish a connection to the server
let mut stream = TcpStream::connect(addr).await.unwrap();
// Get a key, data is missing
stream
.write_all(b"*2\r\n$3\r\nFOO\r\n$5\r\nhello\r\n")
.await
.unwrap();
let mut response = [0; 28];
stream.read_exact(&mut response).await.unwrap();
assert_eq!(b"-ERR unknown command \'foo\'\r\n", &response);
}
// In this case we test that server Responds with an Error message if a client
// sends an GET or SET command after a SUBSCRIBE
#[tokio::test]
async fn send_error_get_set_after_subscribe() {
let addr = start_server().await;
let mut stream = TcpStream::connect(addr).await.unwrap();
// send SUBSCRIBE command
stream
.write_all(b"*2\r\n$9\r\nsubscribe\r\n$5\r\nhello\r\n")
.await
.unwrap();
let mut response = [0; 34];
stream.read_exact(&mut response).await.unwrap();
assert_eq!(
&b"*3\r\n$9\r\nsubscribe\r\n$5\r\nhello\r\n:1\r\n"[..],
&response[..]
);
stream
.write_all(b"*3\r\n$3\r\nSET\r\n$5\r\nhello\r\n$5\r\nworld\r\n")
.await
.unwrap();
let mut response = [0; 28];
stream.read_exact(&mut response).await.unwrap();
assert_eq!(b"-ERR unknown command \'set\'\r\n", &response);
stream
.write_all(b"*2\r\n$3\r\nGET\r\n$5\r\nhello\r\n")
.await
.unwrap();
let mut response = [0; 28];
stream.read_exact(&mut response).await.unwrap();
assert_eq!(b"-ERR unknown command \'get\'\r\n", &response);
}
async fn start_server() -> SocketAddr {
let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
let addr = listener.local_addr().unwrap();
tokio::spawn(async move { server::run(listener, tokio::signal::ctrl_c()).await });
addr
}