feat: add test for isOnline

test/user.js

@@ -2164,12 +2164,22 @@ describe('User', function () {
 		});
 	});
 
+	describe('status/online', function () {
 		it('should return offline if user is guest', function (done) {
 			var status = User.getStatus({ uid: 0 });
 			assert.strictEqual(status, 'offline');
 			done();
 		});
 
+		it('should return offline if user is guest', async function () {
+			assert.strictEqual(await User.isOnline(0), false);
+		});
+
+		it('should return true', async function () {
+			assert.strictEqual(await User.isOnline(testUid), true);
+		});
+	});
+
 	describe('isPrivilegedOrSelf', function () {
 		it('should return not error if self', function (done) {
 			User.isPrivilegedOrSelf(1, 1, function (err) {