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      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.CollectionFeature.REJECTS_DUPLICATES_AT_CREATION;
     21 import static com.google.common.collect.testing.features.CollectionSize.ONE;
     22 import static com.google.common.collect.testing.features.CollectionSize.ZERO;
     23 
     24 import com.google.common.collect.testing.features.CollectionFeature;
     25 import com.google.common.collect.testing.features.CollectionSize;
     26 
     27 import java.util.Arrays;
     28 import java.util.List;
     29 
     30 /**
     31  * A generic JUnit test which tests creation (typically through a constructor or
     32  * static factory method) of a set. Can't be invoked directly; please see
     33  * {@link com.google.common.collect.testing.SetTestSuiteBuilder}.
     34  *
     35  * <p>This class is GWT compatible.
     36  *
     37  * @author Chris Povirk
     38  */
     39 public class SetCreationTester<E> extends AbstractSetTester<E> {
     40   @CollectionFeature.Require(value = ALLOWS_NULL_VALUES,
     41       absent = REJECTS_DUPLICATES_AT_CREATION)
     42   @CollectionSize.Require(absent = {ZERO, ONE})
     43   public void testCreateWithDuplicates_nullDuplicatesNotRejected() {
     44     E[] array = createArrayWithNullElement();
     45     array[0] = null;
     46     collection = getSubjectGenerator().create(array);
     47 
     48     List<E> expectedWithDuplicateRemoved =
     49         Arrays.asList(array).subList(1, getNumElements());
     50     expectContents(expectedWithDuplicateRemoved);
     51   }
     52 
     53   @CollectionFeature.Require(absent = REJECTS_DUPLICATES_AT_CREATION)
     54   @CollectionSize.Require(absent = {ZERO, ONE})
     55   public void testCreateWithDuplicates_nonNullDuplicatesNotRejected() {
     56     E[] array = createSamplesArray();
     57     array[1] = samples.e0;
     58     collection = getSubjectGenerator().create(array);
     59 
     60     List<E> expectedWithDuplicateRemoved =
     61         Arrays.asList(array).subList(1, getNumElements());
     62     expectContents(expectedWithDuplicateRemoved);
     63   }
     64 
     65   @CollectionFeature.Require(
     66       {ALLOWS_NULL_VALUES, REJECTS_DUPLICATES_AT_CREATION})
     67   @CollectionSize.Require(absent = {ZERO, ONE})
     68   public void testCreateWithDuplicates_nullDuplicatesRejected() {
     69     E[] array = createArrayWithNullElement();
     70     array[0] = null;
     71     try {
     72       collection = getSubjectGenerator().create(array);
     73       fail("Should reject duplicate null elements at creation");
     74     } catch (IllegalArgumentException expected) {
     75     }
     76   }
     77 
     78   @CollectionFeature.Require(REJECTS_DUPLICATES_AT_CREATION)
     79   @CollectionSize.Require(absent = {ZERO, ONE})
     80   public void testCreateWithDuplicates_nonNullDuplicatesRejected() {
     81     E[] array = createSamplesArray();
     82     array[1] = samples.e0;
     83     try {
     84       collection = getSubjectGenerator().create(array);
     85       fail("Should reject duplicate non-null elements at creation");
     86     } catch (IllegalArgumentException expected) {
     87     }
     88   }
     89 }
     90