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