Add some cache tests

src/main.rs

@@ -11,6 +11,8 @@ mod cache;
 mod config;
 mod exchange;
 mod requests;
+#[cfg(test)]
+mod tests;
 
 #[derive(Parser)]
 #[command(about, long_about = None, arg_required_else_help = true)]

src/tests.rs

@@ -0,0 +1,70 @@
+use crate::{cache::get_api_key, *};
+use std::sync::Once;
+
+static INIT: Once = Once::new();
+
+fn setup_test() {
+    INIT.call_once(|| {
+        let mut path: std::path::PathBuf = std::path::PathBuf::new();
+        path.push(std::env::temp_dir());
+        path.push("testCurrencyCache.db");
+
+        std::env::set_var(config::CACHE_LOCATION_ENV_NAME, &path);
+        if path.exists() {
+            std::fs::remove_file(path).expect("Something went wrong when removing test cache");
+        }
+        cache::create_cache().expect("Something went wrong when creating test cache");
+        cache::set_api_key("testKey".to_string())
+            .expect("Something went wrong when setting api key");
+        cache::add_code(["PLN".to_string(), "Polish zloty".to_string()])
+            .expect("Something went wrong when adding code");
+
+        let mut rates: std::collections::HashMap<String, serde_json::Value> =
+            std::collections::HashMap::new();
+        rates.insert("USD".to_string(), serde_json::json!(0.2546));
+        rates.insert("EUR".to_string(), serde_json::json!(0.2325));
+        cache::add_rates(99710201602, &"PLN".to_string(), &rates).expect("Error seting rates");
+    });
+}
+#[test]
+fn test_cache_get_api_key() {
+    setup_test();
+
+    assert_eq!(
+        get_api_key().expect("Something went wrong when getting api key"),
+        "testKey"
+    );
+}
+#[test]
+fn test_cache_check_code() {
+    setup_test();
+
+    assert!(cache::check_code(&"PLN".to_string()).expect("Something went wrong when getting code"));
+}
+
+#[test]
+fn test_cache_get_rates() {
+    setup_test();
+
+    assert_eq!(
+        cache::get_rate(&"PLN".to_string(), &"USD".to_string()).expect("Error getting rates"),
+        "0.2546"
+    );
+    assert_eq!(
+        cache::get_rate(&"PLN".to_string(), &"EUR".to_string()).expect("Error getting rates"),
+        "0.2325"
+    );
+}
+
+#[test]
+fn test_cache_check_exchange() {
+    setup_test();
+
+    assert!(
+        cache::check_exchange(&"PLN".to_string(), &"USD".to_string()).expect("Error while checking exchange")
+    );
+    assert!(
+        cache::check_exchange(&"PLN".to_string(), &"EUR".to_string()).expect("Error while checking exchange")
+    );
+}
+