Adding test for comments.

test/comment-test.js

@@ -0,0 +1,29 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+var basic_test = require('./basic-tester.js');
+
+basic_test.BASIC_TEST('Comment', 'Comments', `
+REM This is a test!
+'This is a test
+REM
+'
+PRINT "hello"'This is a test
+PRINT "done"
+`, `
+hello
+done
+`);