Added tests

src/args.rs

@@ -41,9 +41,6 @@ pub struct AddPass {
 pub struct GetPass {
     /// The name of the password to get
     pub name: String,
-    /// Copy the password to the clipboard instead of printing it
-    #[arg(short, long)]
-    pub copy: bool,
 }
 
 #[derive(Args)]
@@ -51,3 +48,38 @@ pub struct DeletePass {
     /// The name of the password to delete
     pub name: String,
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn parses_add_command() {
+        let cli = Cli::try_parse_from(["pm", "add", "github"]).expect("parse add");
+        match cli.command {
+            Some(Commands::Add(add)) => assert_eq!(add.name, "github"),
+            _ => panic!("expected add command"),
+        }
+    }
+
+    #[test]
+    fn parses_get_command() {
+        let cli = Cli::try_parse_from(["pm", "get", "email"]).expect("parse get");
+        match cli.command {
+            Some(Commands::Get(get)) => assert_eq!(get.name, "email"),
+            _ => panic!("expected get command"),
+        }
+    }
+
+    #[test]
+    fn rejects_removed_copy_flag() {
+        let cli = Cli::try_parse_from(["pm", "get", "email", "--copy"]);
+        assert!(cli.is_err());
+    }
+
+    #[test]
+    fn parses_list_command() {
+        let cli = Cli::try_parse_from(["pm", "list"]).expect("parse list");
+        assert!(matches!(cli.command, Some(Commands::List)));
+    }
+}

src/storage.rs

@@ -118,3 +118,74 @@ pub fn verify_master_password(password: &str, recorded_hash: &str) -> bool {
         .verify_password(password.as_bytes(), &parsed_hash)
         .is_ok()
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::time::{SystemTime, UNIX_EPOCH};
+
+    fn temp_file_path(prefix: &str) -> String {
+        let nanos = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .expect("time went backwards")
+            .as_nanos();
+        std::env::temp_dir()
+            .join(format!("pm_test_{}_{}_{}", prefix, std::process::id(), nanos))
+            .to_string_lossy()
+            .to_string()
+    }
+
+    #[test]
+    fn key_derivation_is_deterministic_for_same_input() {
+        let mut p1 = String::from("master-password");
+        let mut p2 = String::from("master-password");
+        let salt = "abc123fixedsalt";
+
+        let k1 = derive_key(&mut p1, salt);
+        let k2 = derive_key(&mut p2, salt);
+
+        assert_eq!(k1, k2);
+    }
+
+    #[test]
+    fn hash_and_verify_master_password_work() {
+        let password = "correct-horse-battery-staple";
+        let hash = hash_master_password(password);
+
+        assert!(verify_master_password(password, &hash));
+        assert!(!verify_master_password("wrong-password", &hash));
+    }
+
+    #[test]
+    fn save_load_and_delete_roundtrip() {
+        let path = temp_file_path("vault");
+        let key = [7u8; 32];
+        let mut data = HashMap::new();
+        data.insert("email".to_string(), "pw1".to_string());
+        data.insert("bank".to_string(), "pw2".to_string());
+
+        save_passwords(&path, &data, &key);
+        let loaded = load_passwords(&path, &key);
+        assert_eq!(loaded, data);
+
+        delete_password(&path, "email", &key);
+        let after_delete = load_passwords(&path, &key);
+        assert!(!after_delete.contains_key("email"));
+        assert_eq!(after_delete.get("bank"), Some(&"pw2".to_string()));
+
+        let _ = std::fs::remove_file(path);
+    }
+
+    #[test]
+    fn get_or_create_salt_reuses_existing_value() {
+        let path = temp_file_path("salt");
+
+        let first = get_or_create_salt(&path);
+        let second = get_or_create_salt(&path);
+
+        assert_eq!(first, second);
+        assert_eq!(first.len(), 32);
+
+        let _ = std::fs::remove_file(path);
+    }
+}