001/*
002 * Copyright (C) 2009 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.google;
018
019import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD;
020import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
021import static com.google.common.collect.testing.features.CollectionSize.ZERO;
022import static java.util.Collections.nCopies;
023
024import com.google.common.annotations.GwtCompatible;
025import com.google.common.collect.testing.features.CollectionFeature;
026import com.google.common.collect.testing.features.CollectionSize;
027import com.google.errorprone.annotations.CanIgnoreReturnValue;
028import org.junit.Ignore;
029
030/**
031 * A generic JUnit test which tests conditional {@code setCount()} operations on a multiset. Can't
032 * be invoked directly; please see {@link MultisetTestSuiteBuilder}.
033 *
034 * @author Chris Povirk
035 */
036@GwtCompatible
037@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
038@SuppressWarnings("JUnit4ClassUsedInJUnit3")
039public class MultisetSetCountConditionallyTester<E> extends AbstractMultisetSetCountTester<E> {
040  @Override
041  void setCountCheckReturnValue(E element, int count) {
042    assertTrue(
043        "setCount() with the correct expected present count should return true",
044        setCount(element, count));
045  }
046
047  @Override
048  void setCountNoCheckReturnValue(E element, int count) {
049    setCount(element, count);
050  }
051
052  @CanIgnoreReturnValue
053  private boolean setCount(E element, int count) {
054    return getMultiset().setCount(element, getMultiset().count(element), count);
055  }
056
057  private void assertSetCountNegativeOldCount() {
058    try {
059      getMultiset().setCount(e3(), -1, 1);
060      fail("calling setCount() with a negative oldCount should throw IllegalArgumentException");
061    } catch (IllegalArgumentException expected) {
062    }
063  }
064
065  // Negative oldCount.
066
067  @CollectionFeature.Require(SUPPORTS_ADD)
068  public void testSetCountConditional_negativeOldCount_addSupported() {
069    assertSetCountNegativeOldCount();
070  }
071
072  @CollectionFeature.Require(absent = SUPPORTS_ADD)
073  public void testSetCountConditional_negativeOldCount_addUnsupported() {
074    try {
075      assertSetCountNegativeOldCount();
076    } catch (UnsupportedOperationException tolerated) {
077    }
078  }
079
080  // Incorrect expected present count.
081
082  @CollectionFeature.Require(SUPPORTS_ADD)
083  public void testSetCountConditional_oldCountTooLarge() {
084    assertFalse(
085        "setCount() with a too-large oldCount should return false",
086        getMultiset().setCount(e0(), 2, 3));
087    expectUnchanged();
088  }
089
090  @CollectionSize.Require(absent = ZERO)
091  @CollectionFeature.Require(SUPPORTS_ADD)
092  public void testSetCountConditional_oldCountTooSmallZero() {
093    assertFalse(
094        "setCount() with a too-small oldCount should return false",
095        getMultiset().setCount(e0(), 0, 2));
096    expectUnchanged();
097  }
098
099  @CollectionSize.Require(SEVERAL)
100  @CollectionFeature.Require(SUPPORTS_ADD)
101  public void testSetCountConditional_oldCountTooSmallNonzero() {
102    initThreeCopies();
103    assertFalse(
104        "setCount() with a too-small oldCount should return false",
105        getMultiset().setCount(e0(), 1, 5));
106    expectContents(nCopies(3, e0()));
107  }
108
109  /*
110   * TODO: test that unmodifiable multisets either throw UOE or return false
111   * when both are valid options. Currently we test the UOE cases and the
112   * return-false cases but not their intersection
113   */
114}