001/*
002 * Copyright (C) 2007 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing.testers;
018
019import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES;
020import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
021import static com.google.common.collect.testing.features.CollectionFeature.NON_STANDARD_TOSTRING;
022import static com.google.common.collect.testing.features.CollectionSize.ONE;
023import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
024import static com.google.common.collect.testing.features.CollectionSize.ZERO;
025
026import com.google.common.annotations.GwtCompatible;
027import com.google.common.collect.testing.AbstractCollectionTester;
028import com.google.common.collect.testing.Helpers;
029import com.google.common.collect.testing.features.CollectionFeature;
030import com.google.common.collect.testing.features.CollectionSize;
031import org.junit.Ignore;
032
033/**
034 * A generic JUnit test which tests {@code toString()} operations on a collection. Can't be invoked
035 * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
036 *
037 * @author Kevin Bourrillion
038 */
039@GwtCompatible
040@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
041@SuppressWarnings("JUnit4ClassUsedInJUnit3")
042public class CollectionToStringTester<E> extends AbstractCollectionTester<E> {
043  public void testToString_minimal() {
044    assertNotNull("toString() should not return null", collection.toString());
045  }
046
047  @CollectionSize.Require(ZERO)
048  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
049  public void testToString_size0() {
050    assertEquals("emptyCollection.toString should return []", "[]", collection.toString());
051  }
052
053  @CollectionSize.Require(ONE)
054  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
055  public void testToString_size1() {
056    assertEquals(
057        "size1Collection.toString should return [{element}]",
058        "[" + e0() + "]",
059        collection.toString());
060  }
061
062  @CollectionSize.Require(SEVERAL)
063  @CollectionFeature.Require(value = KNOWN_ORDER, absent = NON_STANDARD_TOSTRING)
064  public void testToString_sizeSeveral() {
065    String expected = Helpers.copyToList(getOrderedElements()).toString();
066    assertEquals("collection.toString() incorrect", expected, collection.toString());
067  }
068
069  @CollectionSize.Require(absent = ZERO)
070  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
071  public void testToString_null() {
072    initCollectionWithNullElement();
073    testToString_minimal();
074  }
075}