001/*
002 * Copyright (C) 2008 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing.testers;
018
019import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES;
020import static com.google.common.collect.testing.features.CollectionFeature.REJECTS_DUPLICATES_AT_CREATION;
021import static com.google.common.collect.testing.features.CollectionSize.ONE;
022import static com.google.common.collect.testing.features.CollectionSize.ZERO;
023
024import com.google.common.annotations.GwtCompatible;
025import com.google.common.collect.testing.features.CollectionFeature;
026import com.google.common.collect.testing.features.CollectionSize;
027import java.util.Arrays;
028import java.util.List;
029
030/**
031 * A generic JUnit test which tests creation (typically through a constructor or static factory
032 * method) of a set. Can't be invoked directly; please see {@link
033 * com.google.common.collect.testing.SetTestSuiteBuilder}.
034 *
035 * @author Chris Povirk
036 */
037@GwtCompatible
038public class SetCreationTester<E> extends AbstractSetTester<E> {
039  @CollectionFeature.Require(value = ALLOWS_NULL_VALUES, absent = REJECTS_DUPLICATES_AT_CREATION)
040  @CollectionSize.Require(absent = {ZERO, ONE})
041  public void testCreateWithDuplicates_nullDuplicatesNotRejected() {
042    E[] array = createArrayWithNullElement();
043    array[0] = null;
044    collection = getSubjectGenerator().create(array);
045
046    List<E> expectedWithDuplicateRemoved = Arrays.asList(array).subList(1, getNumElements());
047    expectContents(expectedWithDuplicateRemoved);
048  }
049
050  @CollectionFeature.Require(absent = REJECTS_DUPLICATES_AT_CREATION)
051  @CollectionSize.Require(absent = {ZERO, ONE})
052  public void testCreateWithDuplicates_nonNullDuplicatesNotRejected() {
053    E[] array = createSamplesArray();
054    array[1] = e0();
055    collection = getSubjectGenerator().create(array);
056
057    List<E> expectedWithDuplicateRemoved = Arrays.asList(array).subList(1, getNumElements());
058    expectContents(expectedWithDuplicateRemoved);
059  }
060
061  @CollectionFeature.Require({ALLOWS_NULL_VALUES, REJECTS_DUPLICATES_AT_CREATION})
062  @CollectionSize.Require(absent = {ZERO, ONE})
063  public void testCreateWithDuplicates_nullDuplicatesRejected() {
064    E[] array = createArrayWithNullElement();
065    array[0] = null;
066    try {
067      collection = getSubjectGenerator().create(array);
068      fail("Should reject duplicate null elements at creation");
069    } catch (IllegalArgumentException expected) {
070    }
071  }
072
073  @CollectionFeature.Require(REJECTS_DUPLICATES_AT_CREATION)
074  @CollectionSize.Require(absent = {ZERO, ONE})
075  public void testCreateWithDuplicates_nonNullDuplicatesRejected() {
076    E[] array = createSamplesArray();
077    array[1] = e0();
078    try {
079      collection = getSubjectGenerator().create(array);
080      fail("Should reject duplicate non-null elements at creation");
081    } catch (IllegalArgumentException expected) {
082    }
083  }
084}