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/*
* Copyright (C) 2012 The Guava Authors
*
* 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.common.collect;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.collect.testing.SetTestSuiteBuilder;
import com.google.common.collect.testing.TestStringSetGenerator;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.Feature;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
/**
* Tests for CompactLinkedHashSet.
*
* @author Dimitris Andreou
*/
@GwtIncompatible // java.util.Arrays#copyOf(Object[], int), java.lang.reflect.Array
public class CompactLinkedHashSetTest extends TestCase {
public static Test suite() {
List<Feature<?>> allFeatures =
Arrays.<Feature<?>>asList(
CollectionSize.ANY,
CollectionFeature.ALLOWS_NULL_VALUES,
CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
CollectionFeature.GENERAL_PURPOSE,
CollectionFeature.REMOVE_OPERATIONS,
CollectionFeature.SERIALIZABLE,
CollectionFeature.KNOWN_ORDER,
CollectionFeature.SUPPORTS_ADD,
CollectionFeature.SUPPORTS_REMOVE);
TestSuite suite = new TestSuite();
suite.addTestSuite(CompactLinkedHashSetTest.class);
suite.addTest(
SetTestSuiteBuilder.using(
new TestStringSetGenerator() {
@Override
protected Set<String> create(String[] elements) {
return CompactLinkedHashSet.create(Arrays.asList(elements));
}
})
.named("CompactLinkedHashSet")
.withFeatures(allFeatures)
.createTestSuite());
return suite;
}
public void testAllocArraysDefault() {
CompactHashSet<Integer> set = CompactHashSet.create();
assertThat(set.needsAllocArrays()).isTrue();
assertThat(set.elements).isNull();
set.add(1);
assertThat(set.needsAllocArrays()).isFalse();
assertThat(set.elements).hasLength(CompactHashing.DEFAULT_SIZE);
}
public void testAllocArraysExpectedSize() {
for (int i = 0; i <= CompactHashing.DEFAULT_SIZE; i++) {
CompactHashSet<Integer> set = CompactHashSet.createWithExpectedSize(i);
assertThat(set.needsAllocArrays()).isTrue();
assertThat(set.elements).isNull();
set.add(1);
assertThat(set.needsAllocArrays()).isFalse();
int expectedSize = Math.max(1, i);
assertThat(set.elements).hasLength(expectedSize);
}
}
}
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