guava

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/*
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 * Copyright (C) 2007 The Guava Authors
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 * http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.google.common.collect.testing.testers;
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import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_QUERIES;
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import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES;
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import static com.google.common.collect.testing.features.CollectionSize.ZERO;
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import com.google.common.annotations.GwtCompatible;
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import com.google.common.collect.testing.AbstractCollectionTester;
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import com.google.common.collect.testing.WrongType;
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import com.google.common.collect.testing.features.CollectionFeature;
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import com.google.common.collect.testing.features.CollectionSize;
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import org.junit.Ignore;
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/**
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 * A generic JUnit test which tests {@code contains()} operations on a collection. Can't be invoked
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 * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
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 *
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 * @author Kevin Bourrillion
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 * @author Chris Povirk
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 */
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@GwtCompatible
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@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
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public class CollectionContainsTester<E> extends AbstractCollectionTester<E> {
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  @CollectionSize.Require(absent = ZERO)
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  public void testContains_yes() {
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    assertTrue("contains(present) should return true", collection.contains(e0()));
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  }
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  public void testContains_no() {
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    assertFalse("contains(notPresent) should return false", collection.contains(e3()));
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  }
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  @CollectionFeature.Require(ALLOWS_NULL_QUERIES)
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  public void testContains_nullNotContainedButQueriesSupported() {
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    assertFalse("contains(null) should return false", collection.contains(null));
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  }
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  @CollectionFeature.Require(absent = ALLOWS_NULL_QUERIES)
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  public void testContains_nullNotContainedAndUnsupported() {
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    expectNullMissingWhenNullUnsupported("contains(null) should return false or throw");
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  }
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  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
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  @CollectionSize.Require(absent = ZERO)
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  public void testContains_nonNullWhenNullContained() {
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    initCollectionWithNullElement();
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    assertFalse("contains(notPresent) should return false", collection.contains(e3()));
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  }
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  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
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  @CollectionSize.Require(absent = ZERO)
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  public void testContains_nullContained() {
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    initCollectionWithNullElement();
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    assertTrue("contains(null) should return true", collection.contains(null));
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  }
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  public void testContains_wrongType() {
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    try {
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      assertFalse(
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          "contains(wrongType) should return false or throw", collection.contains(WrongType.VALUE));
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    } catch (ClassCastException tolerated) {
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    }
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  }
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}
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