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.Helpers.copyToList;
020import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES;
021import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
022import static com.google.common.collect.testing.features.CollectionFeature.NON_STANDARD_TOSTRING;
023import static com.google.common.collect.testing.features.CollectionSize.ONE;
024import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
025import static com.google.common.collect.testing.features.CollectionSize.ZERO;
026
027import com.google.common.annotations.GwtCompatible;
028import com.google.common.collect.testing.AbstractCollectionTester;
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("test runners must not instantiate and run this directly, only via suites we build")
041// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
042@SuppressWarnings("JUnit4ClassUsedInJUnit3")
043public class CollectionToStringTester<E> extends AbstractCollectionTester<E> {
044  public void testToString_minimal() {
045    assertNotNull("toString() should not return null", collection.toString());
046  }
047
048  @CollectionSize.Require(ZERO)
049  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
050  public void testToString_size0() {
051    assertEquals("emptyCollection.toString should return []", "[]", collection.toString());
052  }
053
054  @CollectionSize.Require(ONE)
055  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
056  public void testToString_size1() {
057    assertEquals(
058        "size1Collection.toString should return [{element}]",
059        "[" + e0() + "]",
060        collection.toString());
061  }
062
063  @CollectionSize.Require(SEVERAL)
064  @CollectionFeature.Require(value = KNOWN_ORDER, absent = NON_STANDARD_TOSTRING)
065  public void testToString_sizeSeveral() {
066    String expected = copyToList(getOrderedElements()).toString();
067    assertEquals("collection.toString() incorrect", expected, collection.toString());
068  }
069
070  @CollectionSize.Require(absent = ZERO)
071  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
072  public void testToString_null() {
073    initCollectionWithNullElement();
074    testToString_minimal();
075  }
076}