feat: add Valkey module (#252)

Co-authored-by: Artem Medvedev <i@ddtkey.com>

Author: ivanvs

Cargo.toml

@@ -52,6 +52,7 @@ solr = []
 surrealdb = []
 trufflesuite_ganachecli = []
 victoria_metrics = []
+valkey = []
 zookeeper = []
 cockroach_db = []
 kwok = []

src/lib.rs

@@ -148,6 +148,10 @@ pub mod surrealdb;
 #[cfg_attr(docsrs, doc(cfg(feature = "trufflesuite_ganachecli")))]
 /// **Trufflesuite Ganache CLI** (etherium simulator) testcontainer
 pub mod trufflesuite_ganachecli;
+#[cfg(feature = "valkey")]
+#[cfg_attr(docsrs, doc(cfg(feature = "valkey")))]
+/// **Valkey** (in memory nosql database) testcontainer
+pub mod valkey;
 #[cfg(feature = "victoria_metrics")]
 #[cfg_attr(docsrs, doc(cfg(feature = "victoria_metrics")))]
 /// **VictoriaMetrics** (monitoring and time series metrics database) testcontainer

src/valkey/mod.rs

@@ -0,0 +1,87 @@
+use testcontainers::{
+    core::{ContainerPort, WaitFor},
+    Image,
+};
+
+const NAME: &str = "valkey/valkey";
+const TAG: &str = "8.0.1-alpine";
+
+/// Default port (6379) on which Valkey is exposed
+pub const VALKEY_PORT: ContainerPort = ContainerPort::Tcp(6379);
+
+/// Module to work with [`Valkey`] inside of tests.
+/// Valkey is a high-performance data structure server that primarily serves key/value workloads.
+///
+/// Starts an instance of Valkey based on the official [`Valkey docker image`].
+///
+/// By default, Valkey is exposed on Port 6379 ([`VALKEY_PORT`]), just like Redis, and has no access control.
+/// Currently, for communication with Valkey we can still use redis library.
+///
+/// # Example
+/// ```
+/// use redis::Commands;
+/// use testcontainers_modules::{
+///     testcontainers::runners::SyncRunner,
+///     valkey::{Valkey, VALKEY_PORT},
+/// };
+///
+/// let valkey_instance = Valkey::default().start().unwrap();
+/// let host_ip = valkey_instance.get_host().unwrap();
+/// let host_port = valkey_instance.get_host_port_ipv4(VALKEY_PORT).unwrap();
+///
+/// let url = format!("redis://{host_ip}:{host_port}");
+/// let client = redis::Client::open(url.as_ref()).unwrap();
+/// let mut con = client.get_connection().unwrap();
+///
+/// con.set::<_, _, ()>("my_key", 42).unwrap();
+/// let result: i64 = con.get("my_key").unwrap();
+/// ```
+///
+/// [`Valkey`]: https://valkey.io/
+/// [`Valeky docker image`]: https://hub.docker.com/r/valkey/valkey
+/// [`VALKEY_PORT`]: super::VALKEY_PORT
+#[derive(Debug, Default, Clone)]
+pub struct Valkey {
+    /// (remove if there is another variable)
+    /// Field is included to prevent this struct to be a unit struct.
+    /// This allows extending functionality (and thus further variables) without breaking changes
+    _priv: (),
+}
+
+impl Image for Valkey {
+    fn name(&self) -> &str {
+        NAME
+    }
+
+    fn tag(&self) -> &str {
+        TAG
+    }
+
+    fn ready_conditions(&self) -> Vec<WaitFor> {
+        vec![WaitFor::message_on_stdout("Ready to accept connections")]
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use redis::Commands;
+
+    use crate::{testcontainers::runners::SyncRunner, valkey::Valkey};
+
+    #[test]
+    fn valkey_fetch_an_integer() -> Result<(), Box<dyn std::error::Error + 'static>> {
+        let _ = pretty_env_logger::try_init();
+        let node = Valkey::default().start()?;
+        let host_ip = node.get_host()?;
+        let host_port = node.get_host_port_ipv4(6379)?;
+        let url = format!("redis://{host_ip}:{host_port}");
+
+        let client = redis::Client::open(url.as_ref()).unwrap();
+        let mut con = client.get_connection().unwrap();
+
+        con.set::<_, _, ()>("my_key", 42).unwrap();
+        let result: i64 = con.get("my_key").unwrap();
+        assert_eq!(42, result);
+        Ok(())
+    }
+}