add program argument for functional testing; simplify execute argument

Signed-off-by: Jason Volk <jason@zemos.net>

src/main/clap.rs

@@ -28,6 +28,10 @@ pub(crate) struct Args {
 	/// Execute console command automatically after startup.
 	#[arg(long)]
 	pub(crate) execute: Vec<String>,
+
+	/// Set functional testing modes if available. Ex '--test=smoke'
+	#[arg(long, hide(true))]
+	pub(crate) test: Vec<String>,
 }
 
 /// Parse commandline arguments into structured data
@@ -44,9 +48,10 @@ pub(crate) fn update(mut config: Figment, args: &Args) -> Result<Figment> {
 	}
 
 	// Execute commands after any commands listed in configuration file
-	for command in &args.execute {
-		config = config.adjoin(("admin_execute", [command]));
-	}
+	config = config.adjoin(("admin_execute", &args.execute));
+
+	// Update config with names of any functional-tests
+	config = config.adjoin(("test", &args.test));
 
 	// All other individual overrides can go last in case we have options which
 	// set multiple conf items at once and the user still needs granular overrides.