1 /* 2 * Copyright (C) 2008 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.collect.testing.testers; 18 19 import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; 20 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 21 22 import com.google.common.annotations.GwtCompatible; 23 import com.google.common.annotations.GwtIncompatible; 24 import com.google.common.collect.testing.AbstractCollectionTester; 25 import com.google.common.collect.testing.Helpers; 26 import com.google.common.collect.testing.features.CollectionFeature; 27 import com.google.common.collect.testing.features.CollectionSize; 28 29 import java.lang.reflect.Method; 30 31 /** 32 * A generic JUnit test which tests creation (typically through a constructor or 33 * static factory method) of a collection. Can't be invoked directly; please see 34 * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. 35 * 36 * @author Chris Povirk 37 */ 38 @GwtCompatible(emulated = true) 39 public class CollectionCreationTester<E> extends AbstractCollectionTester<E> { 40 @CollectionFeature.Require(ALLOWS_NULL_VALUES) 41 @CollectionSize.Require(absent = ZERO) testCreateWithNull_supported()42 public void testCreateWithNull_supported() { 43 E[] array = createArrayWithNullElement(); 44 collection = getSubjectGenerator().create(array); 45 expectContents(array); 46 } 47 48 @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES) 49 @CollectionSize.Require(absent = ZERO) testCreateWithNull_unsupported()50 public void testCreateWithNull_unsupported() { 51 E[] array = createArrayWithNullElement(); 52 53 try { 54 getSubjectGenerator().create(array); 55 fail("Creating a collection containing null should fail"); 56 } catch (NullPointerException expected) { 57 } 58 } 59 60 /** 61 * Returns the {@link Method} instance for {@link 62 * #testCreateWithNull_unsupported()} so that tests can suppress it 63 * with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a 64 * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun 65 * bug 5045147</a> is fixed. 66 */ 67 @GwtIncompatible("reflection") getCreateWithNullUnsupportedMethod()68 public static Method getCreateWithNullUnsupportedMethod() { 69 return Helpers.getMethod(CollectionCreationTester.class, "testCreateWithNull_unsupported"); 70 } 71 } 72