hiqlite 0.13.2

Hiqlite - highly-available, embeddable, raft-based SQLite + cache
Documentation 
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use crate::{log, Cache};
use hiqlite::{Client, Error};
use std::string::ToString;
use std::time::Duration;
use tokio::time;

pub const KEY: &str = "my key 1";
pub const VALUE: &str = "test value 123";

pub const KEY_2: &str = "my key 2";
pub const VALUE_2: &str = "test value 456";

pub async fn test_cache(
    client_1: &Client,
    client_2: &Client,
    client_3: &Client,
) -> Result<(), Error> {
    log("Put a value into the cache");
    client_1
        .put(Cache::One, KEY, &VALUE.to_string(), None)
        .await?;

    log("Make sure all clients can read the cache value");

    let v: String = client_1.get(Cache::One, KEY).await?.unwrap();
    assert_eq!(&v, VALUE);

    time::sleep(Duration::from_millis(10)).await;
    let v: String = client_2.get(Cache::One, KEY).await?.unwrap();
    assert_eq!(&v, VALUE);
    let v: String = client_3.get(Cache::One, KEY).await?.unwrap();
    assert_eq!(&v, VALUE);

    log("Delete the value and make sure it's gone");
    client_1.delete(Cache::One, KEY).await?;

    let res: Option<String> = client_1.get(Cache::One, KEY).await?;
    assert!(res.is_none());

    time::sleep(Duration::from_millis(10)).await;
    let res: Option<String> = client_2.get(Cache::One, KEY).await?;
    assert!(res.is_none());
    let res: Option<String> = client_3.get(Cache::One, KEY).await?;
    assert!(res.is_none());

    log("Test cache TTL");
    let key = "key exp";
    let value = "some expiring value".to_string();
    client_1.put(Cache::One, key, &value, Some(1)).await?;
    client_1.put(Cache::Two, key, &value, Some(1)).await?;
    client_1.put(Cache::Three, key, &value, Some(1)).await?;

    let key_long = "key long exp";
    let value_long = "some other expiring value".to_string();
    client_1
        .put(Cache::One, key_long, &value_long, Some(3))
        .await?;

    // make sure it is still there for the next second
    time::sleep(Duration::from_millis(500)).await;
    let v: String = client_1.get(Cache::One, key).await?.unwrap();
    assert_eq!(v, value);
    let v: String = client_2.get(Cache::One, key).await?.unwrap();
    assert_eq!(v, value);
    let v: String = client_3.get(Cache::One, key).await?.unwrap();
    assert_eq!(v, value);

    let v: String = client_1.get(Cache::Two, key).await?.unwrap();
    assert_eq!(v, value);
    let v: String = client_2.get(Cache::Two, key).await?.unwrap();
    assert_eq!(v, value);
    let v: String = client_3.get(Cache::Two, key).await?.unwrap();
    assert_eq!(v, value);

    let v: String = client_1.get(Cache::Three, key).await?.unwrap();
    assert_eq!(v, value);
    let v: String = client_2.get(Cache::Three, key).await?.unwrap();
    assert_eq!(v, value);
    let v: String = client_3.get(Cache::Three, key).await?.unwrap();
    assert_eq!(v, value);

    // it should be gone shortly after the expiry
    time::sleep(Duration::from_millis(600)).await;
    let v: Option<String> = client_1.get(Cache::One, key).await?;
    assert!(v.is_none());
    let v: Option<String> = client_2.get(Cache::One, key).await?;
    assert!(v.is_none());
    let v: Option<String> = client_3.get(Cache::One, key).await?;
    assert!(v.is_none());

    let v: Option<String> = client_1.get(Cache::Two, key).await?;
    assert!(v.is_none());
    let v: Option<String> = client_2.get(Cache::Two, key).await?;
    assert!(v.is_none());
    let v: Option<String> = client_3.get(Cache::Two, key).await?;
    assert!(v.is_none());

    let v: Option<String> = client_1.get(Cache::Three, key).await?;
    assert!(v.is_none());
    let v: Option<String> = client_2.get(Cache::Three, key).await?;
    assert!(v.is_none());
    let v: Option<String> = client_3.get(Cache::Three, key).await?;
    assert!(v.is_none());

    // the 3-second value should still be there
    time::sleep(Duration::from_millis(1500)).await;
    let v: String = client_1.get(Cache::One, key_long).await?.unwrap();
    assert_eq!(v, value_long);
    let v: String = client_2.get(Cache::One, key_long).await?.unwrap();
    assert_eq!(v, value_long);
    let v: String = client_3.get(Cache::One, key_long).await?.unwrap();
    assert_eq!(v, value_long);

    // make sure the 3-second value is gone as well
    time::sleep(Duration::from_millis(3100 - 500 - 600 - 1500)).await;
    let v: Option<String> = client_1.get(Cache::One, key_long).await?;
    assert!(v.is_none());
    let v: Option<String> = client_2.get(Cache::One, key_long).await?;
    assert!(v.is_none());
    let v: Option<String> = client_3.get(Cache::One, key_long).await?;
    assert!(v.is_none());

    log("Test cache separation");
    client_1
        .put(Cache::One, KEY, &VALUE.to_string(), None)
        .await?;
    let v: String = client_1.get(Cache::One, KEY).await?.unwrap();
    assert_eq!(&v, VALUE);
    let v: Option<String> = client_1.get(Cache::Two, KEY).await?;
    assert!(v.is_none());
    let v: Option<String> = client_1.get(Cache::Three, KEY).await?;
    assert!(v.is_none());

    client_1
        .put(Cache::Two, KEY_2, &VALUE_2.to_string(), None)
        .await?;
    let v: String = client_1.get(Cache::Two, KEY_2).await?.unwrap();
    assert_eq!(&v, VALUE_2);
    let v: Option<String> = client_1.get(Cache::One, KEY_2).await?;
    assert!(v.is_none());
    let v: Option<String> = client_1.get(Cache::Three, KEY_2).await?;
    assert!(v.is_none());

    insert_test_value_cache(client_1).await?;

    log("Test Counters");
    let key = "counter1";
    client_1.counter_set(Cache::One, key, 13).await?;
    let v = client_1.counter_get(Cache::One, key).await?;
    assert_eq!(v.unwrap(), 13);
    let v = client_1.counter_get(Cache::Two, key).await?;
    assert!(v.is_none());

    client_1.counter_set(Cache::One, key, -17).await?;
    let v = client_1.counter_get(Cache::One, key).await?;
    assert_eq!(v.unwrap(), -17);

    let v = client_1.counter_add(Cache::One, key, 19).await?;
    assert_eq!(v, 2);

    let v = client_1.counter_add(Cache::One, key, -3).await?;
    assert_eq!(v, -1);

    Ok(())
}

pub async fn insert_test_value_cache(client: &Client) -> Result<(), Error> {
    log("Insert a test value to be able to test replication after self-healing");
    client
        .put(Cache::One, KEY, &VALUE.to_string(), None)
        .await?;
    client
        .put(Cache::Two, KEY_2, &VALUE_2.to_string(), None)
        .await?;

    Ok(())
}