test/jdk/java/io/FilePermission/FilePermissionCollectionMerge.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/**
 *
 * @test
 * @bug 8168127 8354053
 * @summary FilePermissionCollection merges incorrectly
 * @modules java.base/java.io:open
 * @library /test/lib
 * @build jdk.test.lib.Asserts
 * @run main FilePermissionCollectionMerge
 */

import java.io.FilePermission;
import java.lang.reflect.Method;
import java.security.Permissions;

import jdk.test.lib.Asserts;

@SuppressWarnings("removal")
public class FilePermissionCollectionMerge {

    public static void main(String[] args) throws Exception {
        test("x");
        test("x/*");
        test("x/-");
        test("*");
        test("-");
        test("/x");
        test("/x/*");
        test("/x/-");
    }

    static void test(String arg) throws Exception {

        Method altPathMethod;
        Method plusAltPathMethod;
        try {
            altPathMethod = FilePermission.class.getDeclaredMethod("newPermUsingAltPath");
            altPathMethod.setAccessible(true);
            plusAltPathMethod = FilePermission.class.getDeclaredMethod("newPermPlusAltPath");
            plusAltPathMethod.setAccessible(true);
        } catch (Exception ex) {
            System.err.println("File permission compatibility initialization failed");
            throw ex;
        }
        FilePermission fp1 = new FilePermission(arg, "read");
        FilePermission fp2 = (FilePermission) altPathMethod.invoke(fp1);
        FilePermission fp3 = (FilePermission) plusAltPathMethod.invoke(fp1);

        // All 3 are different
        Asserts.assertNE(fp1, fp2);
        Asserts.assertNE(fp1.hashCode(), fp2.hashCode());

        Asserts.assertNE(fp1, fp3);
        Asserts.assertNE(fp1.hashCode(), fp3.hashCode());

        Asserts.assertNE(fp2, fp3);
        Asserts.assertNE(fp2.hashCode(), fp3.hashCode());

        // The plus one implies the other 2
        Asserts.assertTrue(fp3.implies(fp1));
        Asserts.assertTrue(fp3.implies(fp2));

        // The using one different from original
        Asserts.assertFalse(fp2.implies(fp1));
        Asserts.assertFalse(fp1.implies(fp2));

        // FilePermssionCollection::implies always works
        testMerge(fp1);
        testMerge(fp2);
        testMerge(fp3);
        testMerge(fp1, fp2);
        testMerge(fp1, fp3);
        testMerge(fp2, fp1);
        testMerge(fp2, fp3);
        testMerge(fp3, fp1);
        testMerge(fp3, fp2);
        testMerge(fp1, fp2, fp3);
        testMerge(fp2, fp3, fp1);
        testMerge(fp3, fp1, fp2);
    }

    // Add all into a collection, and check if it implies the last one.
    static void testMerge(FilePermission... fps) {
        java.security.Permissions perms = new Permissions();
        FilePermission last = null;
        for (FilePermission fp : fps) {
            perms.add(fp);
            last = fp;
        }
        Asserts.assertTrue(perms.implies(last));
    }
}