/*
    * Copyright (C) 2007 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.KNOWN_ORDER;
  import static com.google.common.collect.testing.features.CollectionFeature.NON_STANDARD_TOSTRING;
  import static com.google.common.collect.testing.features.CollectionSize.ONE;
  import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
  import static com.google.common.collect.testing.features.CollectionSize.ZERO;
  
  import com.google.common.annotations.GwtCompatible;
  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;
  
  /**
   * A generic JUnit test which tests {@code toString()} operations on a
   * collection. Can't be invoked directly; please see
   * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
   *
   * @author Kevin Bourrillion
   */
  @GwtCompatible
  public class CollectionToStringTester<E> extends AbstractCollectionTester<E> {
    public void testToString_minimal() {
      assertNotNull("toString() should not return null",
          collection.toString());
    }
  
    @CollectionSize.Require(ZERO)
    @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
    public void testToString_size0() {
      assertEquals("emptyCollection.toString should return []", "[]",
          collection.toString());
    }
  
    @CollectionSize.Require(ONE)
    @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
    public void testToString_size1() {
      assertEquals("size1Collection.toString should return [{element}]",
          "[" + samples.e0 + "]", collection.toString());
    }
  
    @CollectionSize.Require(SEVERAL)
    @CollectionFeature.Require(
        value = KNOWN_ORDER, absent = NON_STANDARD_TOSTRING)
    public void testToString_sizeSeveral() {
      String expected = Helpers.copyToList(getOrderedElements()).toString();
      assertEquals("collection.toString() incorrect",
          expected, collection.toString());
    }
  
    @CollectionSize.Require(absent = ZERO)
    @CollectionFeature.Require(ALLOWS_NULL_VALUES)
    public void testToString_null() {
      initCollectionWithNullElement();
      testToString_minimal();
    }
  }