com.google.gwt.dev.util.collect.IdentityHashSetTest.java Source code

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Here is the source code for com.google.gwt.dev.util.collect.IdentityHashSetTest.java

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/*
 * Copyright 2009 Google Inc.
 *
 * Licensed 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.google.gwt.dev.util.collect;

import org.apache.commons.collections.set.AbstractTestSet;

import java.util.AbstractSet;
import java.util.Collection;
import java.util.Iterator;
import java.util.Set;

/**
 * Test for {@link HashMap}.
 */
public class IdentityHashSetTest extends AbstractTestSet {
    private static final Float FLOAT_6 = 6.0f;
    private static final Double DOUBLE_5 = 5.0;

    public IdentityHashSetTest(String testName) {
        super(testName);
    }

    @Override
    public boolean areEqualElementsDistinguishable() {
        return true;
    }

    /**
     * Must use stable identities.
     */
    @Override
    public Object[] getFullNonNullElements() {
        return new Object[] { "", "One", 2, "Three", 4, "One", DOUBLE_5, FLOAT_6, "Seven", "Eight", "Nine", 10,
                (short) 11, 12L, "Thirteen", "14", "15", (byte) 16 };
    }

    /**
     * Must use stable identities.
     */
    @Override
    public Object[] getOtherNonNullElements() {
        return new Object[] { 0, 0f, 0.0, "Zero", (short) 0, (byte) 0, 0L, '\u0000', "0" };
    }

    @SuppressWarnings("unchecked")
    @Override
    public Collection makeConfirmedCollection() {
        final java.util.IdentityHashMap map = new java.util.IdentityHashMap();
        return new AbstractSet() {
            @Override
            public boolean add(Object e) {
                return map.put(e, e) == null;
            }

            @Override
            public Iterator iterator() {
                return map.keySet().iterator();
            }

            @Override
            public int size() {
                return map.size();
            }
        };
    }

    @SuppressWarnings("unchecked")
    @Override
    public Set makeEmptySet() {
        return new IdentityHashSet();
    }

    @Override
    protected boolean skipSerializedCanonicalTests() {
        return true;
    }

    /**
     * This can't possible work due to non-stable identities.
     */
    @Override
    public void testSerializeDeserializeThenCompare() throws Exception {
    }
}