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.collect.testing.AbstractCollectionTester; 23 import com.google.common.collect.testing.features.CollectionFeature; 24 import com.google.common.collect.testing.features.CollectionSize; 25 26 import java.lang.reflect.Method; 27 28 /** 29 * A generic JUnit test which tests creation (typically through a constructor or 30 * static factory method) of a collection. Can't be invoked directly; please see 31 * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. 32 * 33 * <p>This class is GWT compatible. 34 * 35 * @author Chris Povirk 36 */ 37 public class CollectionCreationTester<E> extends AbstractCollectionTester<E> { 38 @CollectionFeature.Require(ALLOWS_NULL_VALUES) 39 @CollectionSize.Require(absent = ZERO) 40 public void testCreateWithNull_supported() { 41 E[] array = createArrayWithNullElement(); 42 collection = getSubjectGenerator().create(array); 43 expectContents(array); 44 } 45 46 @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES) 47 @CollectionSize.Require(absent = ZERO) 48 public void testCreateWithNull_unsupported() { 49 E[] array = createArrayWithNullElement(); 50 51 try { 52 getSubjectGenerator().create(array); 53 fail("Creating a collection containing null should fail"); 54 } catch (NullPointerException expected) { 55 } 56 } 57 58 /** 59 * Returns the {@link Method} instance for {@link 60 * #testCreateWithNull_unsupported()} so that tests can suppress it 61 * with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a 62 * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun 63 * bug 5045147</a> is fixed. 64 */ 65 public static Method getCreateWithNullUnsupportedMethod() { 66 return Platform.getMethod(CollectionCreationTester.class, "testCreateWithNull_unsupported"); 67 } 68 } 69
