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;
023import static java.util.Arrays.asList;
024import static org.junit.Assert.assertThrows;
025
026import com.google.common.annotations.GwtCompatible;
027import com.google.common.collect.testing.features.CollectionFeature;
028import com.google.common.collect.testing.features.CollectionSize;
029import java.util.List;
030
031/**
032 * A generic JUnit test which tests creation (typically through a constructor or static factory
033 * method) of a set. Can't be invoked directly; please see {@link
034 * com.google.common.collect.testing.SetTestSuiteBuilder}.
035 *
036 * @author Chris Povirk
037 */
038@GwtCompatible
039public class SetCreationTester<E> extends AbstractSetTester<E> {
040  @CollectionFeature.Require(value = ALLOWS_NULL_VALUES, absent = REJECTS_DUPLICATES_AT_CREATION)
041  @CollectionSize.Require(absent = {ZERO, ONE})
042  public void testCreateWithDuplicates_nullDuplicatesNotRejected() {
043    E[] array = createArrayWithNullElement();
044    array[0] = null;
045    collection = getSubjectGenerator().create(array);
046
047    List<E> expectedWithDuplicateRemoved = asList(array).subList(1, getNumElements());
048    expectContents(expectedWithDuplicateRemoved);
049  }
050
051  @CollectionFeature.Require(absent = REJECTS_DUPLICATES_AT_CREATION)
052  @CollectionSize.Require(absent = {ZERO, ONE})
053  public void testCreateWithDuplicates_nonNullDuplicatesNotRejected() {
054    E[] array = createSamplesArray();
055    array[1] = e0();
056    collection = getSubjectGenerator().create(array);
057
058    List<E> expectedWithDuplicateRemoved = asList(array).subList(1, getNumElements());
059    expectContents(expectedWithDuplicateRemoved);
060  }
061
062  @CollectionFeature.Require({ALLOWS_NULL_VALUES, REJECTS_DUPLICATES_AT_CREATION})
063  @CollectionSize.Require(absent = {ZERO, ONE})
064  public void testCreateWithDuplicates_nullDuplicatesRejected() {
065    E[] array = createArrayWithNullElement();
066    array[0] = null;
067    assertThrows(
068        IllegalArgumentException.class, () -> collection = getSubjectGenerator().create(array));
069  }
070
071  @CollectionFeature.Require(REJECTS_DUPLICATES_AT_CREATION)
072  @CollectionSize.Require(absent = {ZERO, ONE})
073  public void testCreateWithDuplicates_nonNullDuplicatesRejected() {
074    E[] array = createSamplesArray();
075    array[1] = e0();
076    assertThrows(
077        IllegalArgumentException.class, () -> collection = getSubjectGenerator().create(array));
078  }
079}