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.CollectionSize.ZERO;
021
022import com.google.common.annotations.GwtCompatible;
023import com.google.common.annotations.GwtIncompatible;
024import com.google.common.annotations.J2ktIncompatible;
025import com.google.common.collect.testing.AbstractCollectionTester;
026import com.google.common.collect.testing.Helpers;
027import com.google.common.collect.testing.features.CollectionFeature;
028import com.google.common.collect.testing.features.CollectionSize;
029import java.lang.reflect.Method;
030import org.junit.Ignore;
031
032/**
033 * A generic JUnit test which tests creation (typically through a constructor or static factory
034 * method) of a collection. Can't be invoked directly; please see {@link
035 * com.google.common.collect.testing.CollectionTestSuiteBuilder}.
036 *
037 * @author Chris Povirk
038 */
039@GwtCompatible(emulated = true)
040@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
041public class CollectionCreationTester<E> extends AbstractCollectionTester<E> {
042  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
043  @CollectionSize.Require(absent = ZERO)
044  public void testCreateWithNull_supported() {
045    E[] array = createArrayWithNullElement();
046    collection = getSubjectGenerator().create(array);
047    expectContents(array);
048  }
049
050  @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES)
051  @CollectionSize.Require(absent = ZERO)
052  public void testCreateWithNull_unsupported() {
053    E[] array = createArrayWithNullElement();
054
055    try {
056      // TODO(kak): remove unused capture
057      Object unused = getSubjectGenerator().create(array);
058      fail("Creating a collection containing null should fail");
059    } catch (NullPointerException expected) {
060    }
061  }
062
063  /**
064   * Returns the {@link Method} instance for {@link #testCreateWithNull_unsupported()} so that tests
065   * can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
066   * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun bug 5045147</a> is fixed.
067   */
068  @J2ktIncompatible
069  @GwtIncompatible // reflection
070  public static Method getCreateWithNullUnsupportedMethod() {
071    return Helpers.getMethod(CollectionCreationTester.class, "testCreateWithNull_unsupported");
072  }
073}