jdk8-mips64-public/langtools: test/tools/javac/parser/StringFoldingTest.java@959103a6100f

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http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/
changeset: 2573:53ca196be1ae
tag: jdk8u25-b17

     1 /*

     2  * Copyright (c) 2011, 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  */

    24 /*

    25  * @test

    26  * @bug 7068902

    27  * @summary verify that string folding can be enabled or disabled

    28  */

    30 import com.sun.source.tree.CompilationUnitTree;

    31 import com.sun.source.util.JavacTask;

    32 import java.io.File;

    33 import java.io.IOException;

    34 import java.net.URI;

    35 import java.util.ArrayList;

    36 import java.util.Arrays;

    37 import java.util.List;

    38 import javax.tools.JavaCompiler;

    39 import javax.tools.JavaFileObject;

    40 import javax.tools.SimpleJavaFileObject;

    41 import javax.tools.ToolProvider;

    43 public class StringFoldingTest {

    44     final JavaCompiler tool;

    45     final JavaSource source;

    47     public StringFoldingTest() {

    48         tool = ToolProvider.getSystemJavaCompiler();

    49         source = new JavaSource();

    50     }

    52     static class JavaSource extends SimpleJavaFileObject {

    54         final static String source =

    55                 "class C {String X=\"F\" + \"O\" + \"L\" + \"D\" + \"E\" + \"D\";}";

    57         JavaSource() {

    58             super(URI.create("myfo:/C.java"), JavaFileObject.Kind.SOURCE);

    59         }

    61         @Override

    62         public CharSequence getCharContent(boolean ignoreEncodingErrors) {

    63             return source;

    64         }

    65     }

    67     public static void main(String... args) throws IOException {

    68         StringFoldingTest t = new StringFoldingTest();

    69         t.run(false);

    70         t.run(true);

    71     }

    73     void run(boolean disableStringFolding) throws IOException {

    74         List<String> argsList = new ArrayList<String>();

    75         if (disableStringFolding) {

    76             argsList.add("-XDallowStringFolding=false");

    77         }

    78         JavacTask ct = (JavacTask)tool.getTask(null, null, null,

    79                 argsList,

    80                 null,

    81                 Arrays.asList(source));

    82         Iterable<? extends CompilationUnitTree> trees = ct.parse();

    83         String text = trees.toString();

    84         System.out.println(text);

    86         if (disableStringFolding) {

    87             if (text.contains("FOLDED")) {

    88                 throw new AssertionError("Expected string folding");

    89             }

    90         } else {

    91             if (!text.contains("FOLDED")) {

    92                 throw new AssertionError("Expected no string folding");

    93             }

    94         }

    95     }

    96 }

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