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test/tools/javac/parser/StringFoldingTest.java@959103a6100f (annotated)

test/tools/javac/parser/StringFoldingTest.java

Wed, 27 Apr 2016 01:34:52 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:34:52 +0800

changeset 0

959103a6100f

child 3074

ca136b17b9f4

permissions

-rw-r--r--

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

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*
aoqi@0	25	* @test
aoqi@0	26	* @bug 7068902
aoqi@0	27	* @summary verify that string folding can be enabled or disabled
aoqi@0	28	*/
aoqi@0	29
aoqi@0	30	import com.sun.source.tree.CompilationUnitTree;
aoqi@0	31	import com.sun.source.util.JavacTask;
aoqi@0	32	import java.io.File;
aoqi@0	33	import java.io.IOException;
aoqi@0	34	import java.net.URI;
aoqi@0	35	import java.util.ArrayList;
aoqi@0	36	import java.util.Arrays;
aoqi@0	37	import java.util.List;
aoqi@0	38	import javax.tools.JavaCompiler;
aoqi@0	39	import javax.tools.JavaFileObject;
aoqi@0	40	import javax.tools.SimpleJavaFileObject;
aoqi@0	41	import javax.tools.ToolProvider;
aoqi@0	42
aoqi@0	43	public class StringFoldingTest {
aoqi@0	44	final JavaCompiler tool;
aoqi@0	45	final JavaSource source;
aoqi@0	46
aoqi@0	47	public StringFoldingTest() {
aoqi@0	48	tool = ToolProvider.getSystemJavaCompiler();
aoqi@0	49	source = new JavaSource();
aoqi@0	50	}
aoqi@0	51
aoqi@0	52	static class JavaSource extends SimpleJavaFileObject {
aoqi@0	53
aoqi@0	54	final static String source =
aoqi@0	55	"class C {String X=\"F\" + \"O\" + \"L\" + \"D\" + \"E\" + \"D\";}";
aoqi@0	56
aoqi@0	57	JavaSource() {
aoqi@0	58	super(URI.create("myfo:/C.java"), JavaFileObject.Kind.SOURCE);
aoqi@0	59	}
aoqi@0	60
aoqi@0	61	@Override
aoqi@0	62	public CharSequence getCharContent(boolean ignoreEncodingErrors) {
aoqi@0	63	return source;
aoqi@0	64	}
aoqi@0	65	}
aoqi@0	66
aoqi@0	67	public static void main(String... args) throws IOException {
aoqi@0	68	StringFoldingTest t = new StringFoldingTest();
aoqi@0	69	t.run(false);
aoqi@0	70	t.run(true);
aoqi@0	71	}
aoqi@0	72
aoqi@0	73	void run(boolean disableStringFolding) throws IOException {
aoqi@0	74	List<String> argsList = new ArrayList<String>();
aoqi@0	75	if (disableStringFolding) {
aoqi@0	76	argsList.add("-XDallowStringFolding=false");
aoqi@0	77	}
aoqi@0	78	JavacTask ct = (JavacTask)tool.getTask(null, null, null,
aoqi@0	79	argsList,
aoqi@0	80	null,
aoqi@0	81	Arrays.asList(source));
aoqi@0	82	Iterable<? extends CompilationUnitTree> trees = ct.parse();
aoqi@0	83	String text = trees.toString();
aoqi@0	84	System.out.println(text);
aoqi@0	85
aoqi@0	86	if (disableStringFolding) {
aoqi@0	87	if (text.contains("FOLDED")) {
aoqi@0	88	throw new AssertionError("Expected string folding");
aoqi@0	89	}
aoqi@0	90	} else {
aoqi@0	91	if (!text.contains("FOLDED")) {
aoqi@0	92	throw new AssertionError("Expected no string folding");
aoqi@0	93	}
aoqi@0	94	}
aoqi@0	95	}
aoqi@0	96	}