Java example source code file (AttributeTests.java)

This example Java source code file (AttributeTests.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylist, attributetests, classformatexception, exception, file, foo, info, list, passing, string, test, util, warning, xourcefile

The AttributeTests.java Java example source code

/*
 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/*
 * @test
 * @bug 6746111 8005252 8008262
 * @summary tests various classfile format and attribute handling by pack200
 * @compile -XDignore.symbol.file Utils.java AttributeTests.java
 * @run main AttributeTests
 * @author ksrini
 */
public class AttributeTests {

    public static void main(String... args) throws Exception {
        test6746111();
        testMethodParameters();
        Utils.cleanup();
    }

    /*
     * this tests ensure that MethodParameters produces by javac is packed
     * correctly. Usually this is not the case as new attributes are available
     * in the sdk jars, since MethodParameters happens to be an optional
     * attribute, thus this test.
     */
    static void testMethodParameters() throws Exception {
        List<String> scratch = new ArrayList<>();
        final String fname = "MP";
        String javaFileName = fname + Utils.JAVA_FILE_EXT;
        String javaClassName = fname + Utils.CLASS_FILE_EXT;
        scratch.add("class " + fname + " {");
        scratch.add("void foo2(int j, final int k){}");
        scratch.add("}");
        File cwd = new File(".");
        File javaFile = new File(cwd, javaFileName);
        Utils.createFile(javaFile, scratch);

        Utils.compiler(javaFile.getName(), "-parameters");

        // jar the file up
        File testjarFile = new File(cwd, "test" + Utils.JAR_FILE_EXT);
        Utils.jar("cvf", testjarFile.getName(), javaClassName);

        Utils.testWithRepack(testjarFile, "--unknown-attribute=error");
    }
    /*
     * this test checks to see if we get the expected strings for output
     */
    static void test6746111() throws Exception {
        String pack200Cmd = Utils.getPack200Cmd();
        File badAttrJar = new File(".", "badattr.jar");
        Utils.copyFile(new File(Utils.TEST_SRC_DIR, "badattr.jar"), badAttrJar);
        File testJar = new File(".", "test.jar");
        List<String> cmds = new ArrayList();
        cmds.add(pack200Cmd);
        cmds.add("--repack");
        cmds.add("-v");
        cmds.add(testJar.getAbsolutePath());
        cmds.add(badAttrJar.getAbsolutePath());
        List<String> output = Utils.runExec(cmds);
        /*
         * compare the repacked jar bit-wise, as all the files
         * should be transmitted "as-is".
         */
        Utils.doCompareBitWise(badAttrJar.getAbsoluteFile(), testJar.getAbsoluteFile());
        String[] expectedStrings = {
            "WARNING: Passing class file uncompressed due to unrecognized" +
                    " attribute: Foo.class",
            "INFO: com.sun.java.util.jar.pack.Attribute$FormatException: " +
                    "class attribute \"XourceFile\":  is unknown attribute " +
                    "in class Foo",
            "INFO: com.sun.java.util.jar.pack.ClassReader$ClassFormatException: " +
                    "AnnotationDefault: attribute length cannot be zero, in Test.message()",
            "WARNING: Passing class file uncompressed due to unknown class format: Test.class"
        };
        List<String> notfoundList = new ArrayList();
        notfoundList.addAll(Arrays.asList(expectedStrings));
        // make sure the expected messages are emitted
        for (String x : output) {
            findString(x, notfoundList, expectedStrings);
        }
        if (!notfoundList.isEmpty()) {
            System.out.println("Not found:");
            for (String x : notfoundList) {
                System.out.println(x);
            }
            throw new Exception("Test fails: " + notfoundList.size() +
                    " expected strings not found");
        }
        testJar.delete();
        badAttrJar.delete();
    }

    private static void findString(String outputStr, List<String> notfoundList,
            String[] expectedStrings) {
        for (String y : expectedStrings) {
            if (outputStr.contains(y)) {
                notfoundList.remove(y);
                return;
            }
        }
    }
}