Add unit tests for burn_all() extrinsic

pallets/creditcoin/src/tests.rs

@@ -3329,3 +3329,31 @@ fn gate_faucet_account_storage_should_return_none_when_not_set() {
 		assert!(gate_faucet.is_none());
 	});
 }
+
+#[test]
+fn burn_all_should_error_when_not_signed() {
+	ExtBuilder::default().build_and_execute(|| {
+		let acct: AccountId = AccountId::new([0; 32]);
+
+		assert_noop!(Creditcoin::burn_all(Origin::none(), acct), BadOrigin);
+	});
+}
+
+#[test]
+fn burn_all_should_emit_event_and_update_storage_when_ok() {
+	ExtBuilder::default().build_and_execute(|| {
+		let acct: AccountId = AccountId::new([0; 32]);
+
+		// no funds have been burned
+		assert_eq!(crate::BurnedFunds::<Test>::count(), 0);
+
+		assert_ok!(Creditcoin::burn_all(Origin::signed(acct.clone()), acct));
+		assert_eq!(crate::BurnedFunds::<Test>::count(), 1); // burn has been registered
+
+		let event = <frame_system::Pallet<Test>>::events().pop().expect("expected an event").event;
+		assert_matches!(event, crate::mock::RuntimeEvent::Creditcoin(crate::Event::Burned(burn_id))=>{
+				let burn_info = crate::BurnedFunds::<Test>::try_get(burn_id).unwrap();
+				// assert on burn_info
+		});
+	});
+}