finish ThriftParser

typesystem/src/test/scala/org/apache/hadoop/metadata/tools/thrift/ThriftLexerTest.scala

@@ -73,6 +73,34 @@ class ThriftLexerTest {
 
   }
 
+  @Test def testNegativeInt {
+    val p = new ThriftParser
+    val r = scan(p, """-1""")
+    Assert.assertTrue(r.successful)
+
+  }
+  
+  @Test def testComment {
+    val p = new ThriftParser
+    val r = scan(p, """/**
+                      * Licensed to the Apache Software Foundation (ASF) under one
+                      * or more contributor license agreements.  See the NOTICE file
+                      * distributed with this work for additional information
+                      * regarding copyright ownership.  The ASF licenses this file
+                      * to you 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
+                      *
+                      *     http://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.
+                      */""")
+  }
+
   @Test def testService {
     val p = new ThriftParser
     val r = scan(p, """/**