/*
    * Copyright (C) 2013 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.google;
  
  import static com.google.common.collect.testing.features.CollectionSize.ONE;
  import static com.google.common.collect.testing.features.CollectionSize.ZERO;
  import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
  import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.collect.Multimap;
  import com.google.common.collect.testing.features.CollectionSize;
  import com.google.common.collect.testing.features.MapFeature;
  
  /**
   * Tester for {@code Multimap.toString()}.
   *
   * @author Louis Wasserman
   */
  @GwtCompatible
  public class MultimapToStringTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
    @CollectionSize.Require(ZERO)
    public void testToStringEmpty() {
      assertEquals("{}", multimap().toString());
    }
  
    @CollectionSize.Require(ONE)
    public void testToStringSingleton() {
      assertEquals("{" + sampleKeys().e0 + "=[" + sampleValues().e0 + "]}", multimap().toString());
    }
  
    @CollectionSize.Require(absent = ZERO)
    @MapFeature.Require(ALLOWS_NULL_KEYS)
    public void testToStringWithNullKey() {
      initMultimapWithNullKey();
      testToStringMatchesAsMap();
    }
  
    @CollectionSize.Require(absent = ZERO)
    @MapFeature.Require(ALLOWS_NULL_VALUES)
    public void testToStringWithNullValue() {
      initMultimapWithNullValue();
      testToStringMatchesAsMap();
    }
  
    public void testToStringMatchesAsMap() {
      assertEquals(multimap().asMap().toString(), multimap().toString());
    }
  }