com.alibaba.citrus.util.internal.apache.lang.EqualsBuilderTests.java Source code

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.citrus.util.internal.apache.lang;

import java.util.Arrays;

import junit.framework.TestCase;

/**
 * Unit tests {@link org.apache.commons.lang.builder.EqualsBuilder}.
 *
 * @author <a href="mailto:sdowney@panix.com">Steve Downey</a>
 * @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
 * @author <a href="mailto:ggregory@seagullsw.com">Gary Gregory</a>
 * @author Maarten Coene
 */
public class EqualsBuilderTests extends TestCase {

    static class TestObject {
        private int a;

        public TestObject() {
        }

        public TestObject(int a) {
            this.a = a;
        }

        @Override
        public boolean equals(Object o) {
            if (o == this) {
                return true;
            }
            if (!(o instanceof TestObject)) {
                return false;
            }
            TestObject rhs = (TestObject) o;
            return a == rhs.a;
        }

        public void setA(int a) {
            this.a = a;
        }

        public int getA() {
            return a;
        }
    }

    static class TestSubObject extends TestObject {
        private int b;

        public TestSubObject() {
            super(0);
        }

        public TestSubObject(int a, int b) {
            super(a);
            this.b = b;
        }

        @Override
        public boolean equals(Object o) {
            if (o == this) {
                return true;
            }
            if (!(o instanceof TestSubObject)) {
                return false;
            }
            TestSubObject rhs = (TestSubObject) o;
            return super.equals(o) && b == rhs.b;
        }

        public void setB(int b) {
            this.b = b;
        }

        public int getB() {
            return b;
        }
    }

    static class TestEmptySubObject extends TestObject {
        public TestEmptySubObject(int a) {
            super(a);
        }
    }

    static class TestTSubObject2 extends TestObject {
        private transient int t;

        public TestTSubObject2(int a, int t) {
            super(a);
        }

        public int getT() {
            return t;
        }

        public void setT(int t) {
            this.t = t;
        }
    }

    public void testSuper() {
        TestObject o1 = new TestObject(4);
        TestObject o2 = new TestObject(5);
        assertEquals(true, new EqualsBuilder().appendSuper(true).append(o1, o1).isEquals());
        assertEquals(false, new EqualsBuilder().appendSuper(false).append(o1, o1).isEquals());
        assertEquals(false, new EqualsBuilder().appendSuper(true).append(o1, o2).isEquals());
        assertEquals(false, new EqualsBuilder().appendSuper(false).append(o1, o2).isEquals());
    }

    public void testObject() {
        TestObject o1 = new TestObject(4);
        TestObject o2 = new TestObject(5);
        assertTrue(new EqualsBuilder().append(o1, o1).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, o2).isEquals());
        o2.setA(4);
        assertTrue(new EqualsBuilder().append(o1, o2).isEquals());

        assertTrue(!new EqualsBuilder().append(o1, this).isEquals());

        assertTrue(!new EqualsBuilder().append(o1, null).isEquals());
        assertTrue(!new EqualsBuilder().append(null, o2).isEquals());
        assertTrue(new EqualsBuilder().append((Object) null, (Object) null).isEquals());
    }

    public void testLong() {
        long o1 = 1L;
        long o2 = 2L;
        assertTrue(new EqualsBuilder().append(o1, o1).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, o2).isEquals());
    }

    public void testInt() {
        int o1 = 1;
        int o2 = 2;
        assertTrue(new EqualsBuilder().append(o1, o1).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, o2).isEquals());
    }

    public void testShort() {
        short o1 = 1;
        short o2 = 2;
        assertTrue(new EqualsBuilder().append(o1, o1).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, o2).isEquals());
    }

    public void testChar() {
        char o1 = 1;
        char o2 = 2;
        assertTrue(new EqualsBuilder().append(o1, o1).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, o2).isEquals());
    }

    public void testByte() {
        byte o1 = 1;
        byte o2 = 2;
        assertTrue(new EqualsBuilder().append(o1, o1).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, o2).isEquals());
    }

    public void testDouble() {
        double o1 = 1;
        double o2 = 2;
        assertTrue(new EqualsBuilder().append(o1, o1).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, o2).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, Double.NaN).isEquals());
        assertTrue(new EqualsBuilder().append(Double.NaN, Double.NaN).isEquals());
        assertTrue(new EqualsBuilder().append(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY).isEquals());
    }

    public void testFloat() {
        float o1 = 1;
        float o2 = 2;
        assertTrue(new EqualsBuilder().append(o1, o1).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, o2).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, Float.NaN).isEquals());
        assertTrue(new EqualsBuilder().append(Float.NaN, Float.NaN).isEquals());
        assertTrue(new EqualsBuilder().append(Float.POSITIVE_INFINITY, Float.POSITIVE_INFINITY).isEquals());
    }

    public void testAccessors() {
        EqualsBuilder equalsBuilder = new EqualsBuilder();
        assertTrue(equalsBuilder.isEquals());
        equalsBuilder.setEquals(true);
        assertTrue(equalsBuilder.isEquals());
        equalsBuilder.setEquals(false);
        assertFalse(equalsBuilder.isEquals());
    }

    public void testBoolean() {
        boolean o1 = true;
        boolean o2 = false;
        assertTrue(new EqualsBuilder().append(o1, o1).isEquals());
        assertTrue(!new EqualsBuilder().append(o1, o2).isEquals());
    }

    public void testObjectArray() {
        TestObject[] obj1 = new TestObject[3];
        obj1[0] = new TestObject(4);
        obj1[1] = new TestObject(5);
        obj1[2] = null;
        TestObject[] obj2 = new TestObject[3];
        obj2[0] = new TestObject(4);
        obj2[1] = new TestObject(5);
        obj2[2] = null;

        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj2, obj2).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[1].setA(6);
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[1].setA(5);
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[2] = obj1[1];
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[2] = null;
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());

        obj2 = null;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1 = null;
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testLongArray() {
        long[] obj1 = new long[2];
        obj1[0] = 5L;
        obj1[1] = 6L;
        long[] obj2 = new long[2];
        obj2[0] = 5L;
        obj2[1] = 6L;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());

        obj2 = null;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1 = null;
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testIntArray() {
        int[] obj1 = new int[2];
        obj1[0] = 5;
        obj1[1] = 6;
        int[] obj2 = new int[2];
        obj2[0] = 5;
        obj2[1] = 6;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());

        obj2 = null;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1 = null;
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testShortArray() {
        short[] obj1 = new short[2];
        obj1[0] = 5;
        obj1[1] = 6;
        short[] obj2 = new short[2];
        obj2[0] = 5;
        obj2[1] = 6;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());

        obj2 = null;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1 = null;
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testCharArray() {
        char[] obj1 = new char[2];
        obj1[0] = 5;
        obj1[1] = 6;
        char[] obj2 = new char[2];
        obj2[0] = 5;
        obj2[1] = 6;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());

        obj2 = null;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1 = null;
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testByteArray() {
        byte[] obj1 = new byte[2];
        obj1[0] = 5;
        obj1[1] = 6;
        byte[] obj2 = new byte[2];
        obj2[0] = 5;
        obj2[1] = 6;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());

        obj2 = null;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1 = null;
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testDoubleArray() {
        double[] obj1 = new double[2];
        obj1[0] = 5;
        obj1[1] = 6;
        double[] obj2 = new double[2];
        obj2[0] = 5;
        obj2[1] = 6;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());

        obj2 = null;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1 = null;
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testFloatArray() {
        float[] obj1 = new float[2];
        obj1[0] = 5;
        obj1[1] = 6;
        float[] obj2 = new float[2];
        obj2[0] = 5;
        obj2[1] = 6;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());

        obj2 = null;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1 = null;
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testBooleanArray() {
        boolean[] obj1 = new boolean[2];
        obj1[0] = true;
        obj1[1] = false;
        boolean[] obj2 = new boolean[2];
        obj2[0] = true;
        obj2[1] = false;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1[1] = true;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());

        obj2 = null;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
        obj1 = null;
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testMultiLongArray() {
        long[][] array1 = new long[2][2];
        long[][] array2 = new long[2][2];
        for (int i = 0; i < array1.length; ++i) {
            for (int j = 0; j < array1[0].length; j++) {
                array1[i][j] = (i + 1) * (j + 1);
                array2[i][j] = (i + 1) * (j + 1);
            }
        }
        assertTrue(new EqualsBuilder().append(array1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(array1, array2).isEquals());
        array1[1][1] = 0;
        assertTrue(!new EqualsBuilder().append(array1, array2).isEquals());
    }

    public void testMultiIntArray() {
        int[][] array1 = new int[2][2];
        int[][] array2 = new int[2][2];
        for (int i = 0; i < array1.length; ++i) {
            for (int j = 0; j < array1[0].length; j++) {
                array1[i][j] = (i + 1) * (j + 1);
                array2[i][j] = (i + 1) * (j + 1);
            }
        }
        assertTrue(new EqualsBuilder().append(array1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(array1, array2).isEquals());
        array1[1][1] = 0;
        assertTrue(!new EqualsBuilder().append(array1, array2).isEquals());
    }

    public void testMultiShortArray() {
        short[][] array1 = new short[2][2];
        short[][] array2 = new short[2][2];
        for (short i = 0; i < array1.length; ++i) {
            for (short j = 0; j < array1[0].length; j++) {
                array1[i][j] = i;
                array2[i][j] = i;
            }
        }
        assertTrue(new EqualsBuilder().append(array1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(array1, array2).isEquals());
        array1[1][1] = 0;
        assertTrue(!new EqualsBuilder().append(array1, array2).isEquals());
    }

    public void testMultiCharArray() {
        char[][] array1 = new char[2][2];
        char[][] array2 = new char[2][2];
        for (char i = 0; i < array1.length; ++i) {
            for (char j = 0; j < array1[0].length; j++) {
                array1[i][j] = i;
                array2[i][j] = i;
            }
        }
        assertTrue(new EqualsBuilder().append(array1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(array1, array2).isEquals());
        array1[1][1] = 0;
        assertTrue(!new EqualsBuilder().append(array1, array2).isEquals());
    }

    public void testMultiByteArray() {
        byte[][] array1 = new byte[2][2];
        byte[][] array2 = new byte[2][2];
        for (byte i = 0; i < array1.length; ++i) {
            for (byte j = 0; j < array1[0].length; j++) {
                array1[i][j] = i;
                array2[i][j] = i;
            }
        }
        assertTrue(new EqualsBuilder().append(array1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(array1, array2).isEquals());
        array1[1][1] = 0;
        assertTrue(!new EqualsBuilder().append(array1, array2).isEquals());
    }

    public void testMultiFloatArray() {
        float[][] array1 = new float[2][2];
        float[][] array2 = new float[2][2];
        for (int i = 0; i < array1.length; ++i) {
            for (int j = 0; j < array1[0].length; j++) {
                array1[i][j] = (i + 1) * (j + 1);
                array2[i][j] = (i + 1) * (j + 1);
            }
        }
        assertTrue(new EqualsBuilder().append(array1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(array1, array2).isEquals());
        array1[1][1] = 0;
        assertTrue(!new EqualsBuilder().append(array1, array2).isEquals());
    }

    public void testMultiDoubleArray() {
        double[][] array1 = new double[2][2];
        double[][] array2 = new double[2][2];
        for (int i = 0; i < array1.length; ++i) {
            for (int j = 0; j < array1[0].length; j++) {
                array1[i][j] = (i + 1) * (j + 1);
                array2[i][j] = (i + 1) * (j + 1);
            }
        }
        assertTrue(new EqualsBuilder().append(array1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(array1, array2).isEquals());
        array1[1][1] = 0;
        assertTrue(!new EqualsBuilder().append(array1, array2).isEquals());
    }

    public void testMultiBooleanArray() {
        boolean[][] array1 = new boolean[2][2];
        boolean[][] array2 = new boolean[2][2];
        for (int i = 0; i < array1.length; ++i) {
            for (int j = 0; j < array1[0].length; j++) {
                array1[i][j] = i == 1 || j == 1;
                array2[i][j] = i == 1 || j == 1;
            }
        }
        assertTrue(new EqualsBuilder().append(array1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(array1, array2).isEquals());
        array1[1][1] = false;
        assertTrue(!new EqualsBuilder().append(array1, array2).isEquals());

        // compare 1 dim to 2.
        boolean[] array3 = new boolean[] { true, true };
        assertFalse(new EqualsBuilder().append(array1, array3).isEquals());
        assertFalse(new EqualsBuilder().append(array3, array1).isEquals());
        assertFalse(new EqualsBuilder().append(array2, array3).isEquals());
        assertFalse(new EqualsBuilder().append(array3, array2).isEquals());
    }

    public void testRaggedArray() {
        long array1[][] = new long[2][];
        long array2[][] = new long[2][];
        for (int i = 0; i < array1.length; ++i) {
            array1[i] = new long[2];
            array2[i] = new long[2];
            for (int j = 0; j < array1[i].length; ++j) {
                array1[i][j] = (i + 1) * (j + 1);
                array2[i][j] = (i + 1) * (j + 1);
            }
        }
        assertTrue(new EqualsBuilder().append(array1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(array1, array2).isEquals());
        array1[1][1] = 0;
        assertTrue(!new EqualsBuilder().append(array1, array2).isEquals());
    }

    public void testMixedArray() {
        Object array1[] = new Object[2];
        Object array2[] = new Object[2];
        for (int i = 0; i < array1.length; ++i) {
            array1[i] = new long[2];
            array2[i] = new long[2];
            for (int j = 0; j < 2; ++j) {
                ((long[]) array1[i])[j] = (i + 1) * (j + 1);
                ((long[]) array2[i])[j] = (i + 1) * (j + 1);
            }
        }
        assertTrue(new EqualsBuilder().append(array1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(array1, array2).isEquals());
        ((long[]) array1[1])[1] = 0;
        assertTrue(!new EqualsBuilder().append(array1, array2).isEquals());
    }

    public void testObjectArrayHiddenByObject() {
        TestObject[] array1 = new TestObject[2];
        array1[0] = new TestObject(4);
        array1[1] = new TestObject(5);
        TestObject[] array2 = new TestObject[2];
        array2[0] = new TestObject(4);
        array2[1] = new TestObject(5);
        Object obj1 = array1;
        Object obj2 = array2;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array2).isEquals());
        array1[1].setA(6);
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testLongArrayHiddenByObject() {
        long[] array1 = new long[2];
        array1[0] = 5L;
        array1[1] = 6L;
        long[] array2 = new long[2];
        array2[0] = 5L;
        array2[1] = 6L;
        Object obj1 = array1;
        Object obj2 = array2;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array2).isEquals());
        array1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testIntArrayHiddenByObject() {
        int[] array1 = new int[2];
        array1[0] = 5;
        array1[1] = 6;
        int[] array2 = new int[2];
        array2[0] = 5;
        array2[1] = 6;
        Object obj1 = array1;
        Object obj2 = array2;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array2).isEquals());
        array1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testShortArrayHiddenByObject() {
        short[] array1 = new short[2];
        array1[0] = 5;
        array1[1] = 6;
        short[] array2 = new short[2];
        array2[0] = 5;
        array2[1] = 6;
        Object obj1 = array1;
        Object obj2 = array2;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array2).isEquals());
        array1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testCharArrayHiddenByObject() {
        char[] array1 = new char[2];
        array1[0] = 5;
        array1[1] = 6;
        char[] array2 = new char[2];
        array2[0] = 5;
        array2[1] = 6;
        Object obj1 = array1;
        Object obj2 = array2;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array2).isEquals());
        array1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testByteArrayHiddenByObject() {
        byte[] array1 = new byte[2];
        array1[0] = 5;
        array1[1] = 6;
        byte[] array2 = new byte[2];
        array2[0] = 5;
        array2[1] = 6;
        Object obj1 = array1;
        Object obj2 = array2;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array2).isEquals());
        array1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testDoubleArrayHiddenByObject() {
        double[] array1 = new double[2];
        array1[0] = 5;
        array1[1] = 6;
        double[] array2 = new double[2];
        array2[0] = 5;
        array2[1] = 6;
        Object obj1 = array1;
        Object obj2 = array2;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array2).isEquals());
        array1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testFloatArrayHiddenByObject() {
        float[] array1 = new float[2];
        array1[0] = 5;
        array1[1] = 6;
        float[] array2 = new float[2];
        array2[0] = 5;
        array2[1] = 6;
        Object obj1 = array1;
        Object obj2 = array2;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array2).isEquals());
        array1[1] = 7;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public void testBooleanArrayHiddenByObject() {
        boolean[] array1 = new boolean[2];
        array1[0] = true;
        array1[1] = false;
        boolean[] array2 = new boolean[2];
        array2[0] = true;
        array2[1] = false;
        Object obj1 = array1;
        Object obj2 = array2;
        assertTrue(new EqualsBuilder().append(obj1, obj1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array1).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, obj2).isEquals());
        assertTrue(new EqualsBuilder().append(obj1, array2).isEquals());
        array1[1] = true;
        assertTrue(!new EqualsBuilder().append(obj1, obj2).isEquals());
    }

    public static class TestACanEqualB {
        private int a;

        public TestACanEqualB(int a) {
            this.a = a;
        }

        @Override
        public boolean equals(Object o) {
            if (o == this) {
                return true;
            }
            if (o instanceof TestACanEqualB) {
                return this.a == ((TestACanEqualB) o).getA();
            }
            if (o instanceof TestBCanEqualA) {
                return this.a == ((TestBCanEqualA) o).getB();
            }
            return false;
        }

        public int getA() {
            return this.a;
        }
    }

    public static class TestBCanEqualA {
        private int b;

        public TestBCanEqualA(int b) {
            this.b = b;
        }

        @Override
        public boolean equals(Object o) {
            if (o == this) {
                return true;
            }
            if (o instanceof TestACanEqualB) {
                return this.b == ((TestACanEqualB) o).getA();
            }
            if (o instanceof TestBCanEqualA) {
                return this.b == ((TestBCanEqualA) o).getB();
            }
            return false;
        }

        public int getB() {
            return this.b;
        }
    }

    /**
     * Tests two instances of classes that can be equal and that are not
     * "related". The two classes are not subclasses of each other and do not
     * share a parent aside from Object. See
     * http://issues.apache.org/bugzilla/show_bug.cgi?id=33069
     */
    public void testUnrelatedClasses() {
        Object[] x = new Object[] { new TestACanEqualB(1) };
        Object[] y = new Object[] { new TestBCanEqualA(1) };

        // sanity checks:
        assertTrue(Arrays.equals(x, x));
        assertTrue(Arrays.equals(y, y));
        assertTrue(Arrays.equals(x, y));
        assertTrue(Arrays.equals(y, x));
        // real tests:
        assertTrue(x[0].equals(x[0]));
        assertTrue(y[0].equals(y[0]));
        assertTrue(x[0].equals(y[0]));
        assertTrue(y[0].equals(x[0]));
        assertTrue(new EqualsBuilder().append(x, x).isEquals());
        assertTrue(new EqualsBuilder().append(y, y).isEquals());
        assertTrue(new EqualsBuilder().append(x, y).isEquals());
        assertTrue(new EqualsBuilder().append(y, x).isEquals());
    }

    /** Test from http://issues.apache.org/bugzilla/show_bug.cgi?id=33067 */
    public void testNpeForNullElement() {
        Object[] x1 = new Object[] { new Integer(1), null, new Integer(3) };
        Object[] x2 = new Object[] { new Integer(1), new Integer(2), new Integer(3) };

        // causes an NPE in 2.0 according to:
        // http://issues.apache.org/bugzilla/show_bug.cgi?id=33067
        new EqualsBuilder().append(x1, x2);
    }
}