1 /*

     2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /**

    25  * @test

    26  * @bug 8056897

    27  * @summary Proper lexing of integer literals.

    28  */

    29 

    30 import java.io.IOException;

    31 import java.net.URI;

    32 import java.util.Objects;

    33 

    34 import javax.tools.JavaFileObject;

    35 import javax.tools.SimpleJavaFileObject;

    36 

    37 import com.sun.tools.javac.parser.JavaTokenizer;

    38 import com.sun.tools.javac.parser.ScannerFactory;

    39 import com.sun.tools.javac.parser.Tokens.Token;

    40 import com.sun.tools.javac.parser.Tokens.TokenKind;

    41 import com.sun.tools.javac.util.Context;

    42 import com.sun.tools.javac.util.Log;

    43 

    44 public class JavaLexerTest {

    45     public static void main(String... args) throws Exception {

    46         new JavaLexerTest().run();

    47     }

    48 

    49     void run() throws Exception {

    50         Context ctx = new Context();

    51         Log log = Log.instance(ctx);

    52         String input = "0bL 0b20L 0xL ";

    53         log.useSource(new SimpleJavaFileObject(new URI("mem://Test.java"), JavaFileObject.Kind.SOURCE) {

    54             @Override

    55             public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {

    56                 return input;

    57             }

    58         });

    59         char[] inputArr = input.toCharArray();

    60         JavaTokenizer tokenizer = new JavaTokenizer(ScannerFactory.instance(ctx), inputArr, inputArr.length) {

    61         };

    62 

    63         assertKind(input, tokenizer, TokenKind.LONGLITERAL, "0bL");

    64         assertKind(input, tokenizer, TokenKind.LONGLITERAL, "0b20L");

    65         assertKind(input, tokenizer, TokenKind.LONGLITERAL, "0xL");

    66     }

    67 

    68     void assertKind(String input, JavaTokenizer tokenizer, TokenKind kind, String expectedText) {

    69         Token token = tokenizer.readToken();

    70 

    71         if (token.kind != kind) {

    72             throw new AssertionError("Unexpected token kind: " + token.kind);

    73         }

    74 

    75         String actualText = input.substring(token.pos, token.endPos);

    76 

    77         if (!Objects.equals(actualText, expectedText)) {

    78             throw new AssertionError("Unexpected token text: " + actualText);

    79         }

    80     }

    81 }