guava

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/*
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 * Copyright (C) 2008 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_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.annotations.GwtIncompatible;
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import com.google.common.annotations.J2ktIncompatible;
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import com.google.common.collect.testing.AbstractCollectionTester;
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import com.google.common.collect.testing.Helpers;
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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 java.lang.reflect.Method;
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import org.junit.Ignore;
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/**
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 * A generic JUnit test which tests creation (typically through a constructor or static factory
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 * method) of a collection. Can't be invoked directly; please see {@link
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 * com.google.common.collect.testing.CollectionTestSuiteBuilder}.
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 *
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 * @author Chris Povirk
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 */
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@GwtCompatible(emulated = true)
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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 CollectionCreationTester<E> extends AbstractCollectionTester<E> {
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  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
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  @CollectionSize.Require(absent = ZERO)
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  public void testCreateWithNull_supported() {
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    E[] array = createArrayWithNullElement();
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    collection = getSubjectGenerator().create(array);
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    expectContents(array);
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  }
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  @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES)
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  @CollectionSize.Require(absent = ZERO)
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  public void testCreateWithNull_unsupported() {
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    E[] array = createArrayWithNullElement();
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    try {
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      // TODO(kak): remove unused capture
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      Object unused = getSubjectGenerator().create(array);
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      fail("Creating a collection containing null should fail");
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    } catch (NullPointerException expected) {
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    }
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  }
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  /**
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   * Returns the {@link Method} instance for {@link #testCreateWithNull_unsupported()} so that tests
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   * can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
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   * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun bug 5045147</a> is fixed.
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   */
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  @J2ktIncompatible
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  @GwtIncompatible // reflection
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  public static Method getCreateWithNullUnsupportedMethod() {
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    return Helpers.getMethod(CollectionCreationTester.class, "testCreateWithNull_unsupported");
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  }
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}
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