/*
    * Copyright (C) 2008 The Guava Authors
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.google.common.collect.testing.testers;
  
  import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES;
  import static com.google.common.collect.testing.features.CollectionFeature.REJECTS_DUPLICATES_AT_CREATION;
  import static com.google.common.collect.testing.features.CollectionSize.ONE;
  import static com.google.common.collect.testing.features.CollectionSize.ZERO;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.collect.testing.features.CollectionFeature;
  import com.google.common.collect.testing.features.CollectionSize;
  
  import java.util.Arrays;
  import java.util.List;
  
  /**
   * A generic JUnit test which tests creation (typically through a constructor or
   * static factory method) of a set. Can't be invoked directly; please see
   * {@link com.google.common.collect.testing.SetTestSuiteBuilder}.
   *
   * @author Chris Povirk
   */
  @GwtCompatible
  public class SetCreationTester<E> extends AbstractSetTester<E> {
    @CollectionFeature.Require(value = ALLOWS_NULL_VALUES,
        absent = REJECTS_DUPLICATES_AT_CREATION)
    @CollectionSize.Require(absent = {ZERO, ONE})
    public void testCreateWithDuplicates_nullDuplicatesNotRejected() {
      E[] array = createArrayWithNullElement();
      array[0] = null;
      collection = getSubjectGenerator().create(array);
  
      List<E> expectedWithDuplicateRemoved =
          Arrays.asList(array).subList(1, getNumElements());
      expectContents(expectedWithDuplicateRemoved);
    }
  
    @CollectionFeature.Require(absent = REJECTS_DUPLICATES_AT_CREATION)
    @CollectionSize.Require(absent = {ZERO, ONE})
    public void testCreateWithDuplicates_nonNullDuplicatesNotRejected() {
      E[] array = createSamplesArray();
      array[1] = samples.e0;
      collection = getSubjectGenerator().create(array);
  
      List<E> expectedWithDuplicateRemoved =
          Arrays.asList(array).subList(1, getNumElements());
      expectContents(expectedWithDuplicateRemoved);
    }
  
    @CollectionFeature.Require(
        {ALLOWS_NULL_VALUES, REJECTS_DUPLICATES_AT_CREATION})
    @CollectionSize.Require(absent = {ZERO, ONE})
    public void testCreateWithDuplicates_nullDuplicatesRejected() {
      E[] array = createArrayWithNullElement();
      array[0] = null;
      try {
        collection = getSubjectGenerator().create(array);
        fail("Should reject duplicate null elements at creation");
      } catch (IllegalArgumentException expected) {
      }
    }
  
    @CollectionFeature.Require(REJECTS_DUPLICATES_AT_CREATION)
    @CollectionSize.Require(absent = {ZERO, ONE})
    public void testCreateWithDuplicates_nonNullDuplicatesRejected() {
      E[] array = createSamplesArray();
      array[1] = samples.e0;
      try {
        collection = getSubjectGenerator().create(array);
        fail("Should reject duplicate non-null elements at creation");
      } catch (IllegalArgumentException expected) {
      }
    }
  }