119 lines
3.9 KiB
Java
119 lines
3.9 KiB
Java
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8264306
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* @summary Verify patterns are desugaring in a reproducible manner
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* @library /tools/lib /tools/javac/lib
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* @modules
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* jdk.compiler/com.sun.tools.javac.api
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* jdk.compiler/com.sun.tools.javac.file
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* jdk.compiler/com.sun.tools.javac.main
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* jdk.compiler/com.sun.tools.javac.util
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* @build toolbox.ToolBox toolbox.JavacTask
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* @compile StablePatternDesugaring.java
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* @run main StablePatternDesugaring
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*/
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.Arrays;
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import toolbox.ToolBox;
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import toolbox.JavacTask;
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public class StablePatternDesugaring {
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protected ToolBox tb;
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StablePatternDesugaring() {
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tb = new ToolBox();
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}
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public static void main(String... args) throws Exception {
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new StablePatternDesugaring().run();
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}
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void run() throws Exception {
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String code = """
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public class T {
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private boolean t(Object o) {
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if (o instanceof String s) {
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return s.isEmpty();
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} else if (o instanceof CharSequence cs) {
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return cs.isEmpty();
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} else if (o instanceof Integer i) {
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return i != 0;
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} else if (o instanceof Float f) {
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return f != 0;
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} else {
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return false;
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}
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}
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}
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""";
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Path base = Paths.get(".");
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Path src = base.resolve("src");
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tb.writeJavaFiles(src, code);
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Path classes1 = base.resolve("classes1");
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if (Files.isDirectory(classes1)) {
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tb.cleanDirectory(classes1);
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} else {
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Files.createDirectories(classes1);
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}
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new JavacTask(tb)
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.files(tb.findJavaFiles(src))
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.outdir(classes1)
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.run()
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.writeAll();
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byte[] expected = Files.readAllBytes(classes1.resolve("T.class"));
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for (int i = 0; i < 10; i++) {
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Path classes2 = base.resolve("classes2");
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if (Files.isDirectory(classes2)) {
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tb.cleanDirectory(classes2);
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} else {
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Files.createDirectories(classes2);
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}
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new JavacTask(tb)
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.files(tb.findJavaFiles(src))
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.outdir(classes2)
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.run()
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.writeAll();
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byte[] actual = Files.readAllBytes(classes2.resolve("T.class"));
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if (!Arrays.equals(expected, actual)) {
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throw new AssertionError("Classfiles differ!");
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}
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}
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}
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}
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