001/* 002 * Copyright (C) 2010 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.CollectionSize.ONE; 020import static com.google.common.collect.testing.features.CollectionSize.SEVERAL; 021import static com.google.common.collect.testing.features.CollectionSize.ZERO; 022 023import com.google.common.annotations.GwtCompatible; 024import com.google.common.collect.testing.Helpers; 025import com.google.common.collect.testing.features.CollectionSize; 026import java.util.Collections; 027import java.util.List; 028import java.util.NoSuchElementException; 029import java.util.SortedSet; 030import org.junit.Ignore; 031 032/** 033 * A generic JUnit test which tests operations on a SortedSet. Can't be invoked directly; please see 034 * {@code SortedSetTestSuiteBuilder}. 035 * 036 * @author Jesse Wilson 037 * @author Louis Wasserman 038 */ 039@GwtCompatible 040@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 041public class SortedSetNavigationTester<E> extends AbstractSetTester<E> { 042 043 private SortedSet<E> sortedSet; 044 private List<E> values; 045 private E a; 046 private E b; 047 private E c; 048 049 @Override 050 public void setUp() throws Exception { 051 super.setUp(); 052 sortedSet = (SortedSet<E>) getSet(); 053 values = 054 Helpers.copyToList( 055 getSubjectGenerator() 056 .getSampleElements(getSubjectGenerator().getCollectionSize().getNumElements())); 057 Collections.sort(values, sortedSet.comparator()); 058 059 // some tests assume SEVERAL == 3 060 if (values.size() >= 1) { 061 a = values.get(0); 062 if (values.size() >= 3) { 063 b = values.get(1); 064 c = values.get(2); 065 } 066 } 067 } 068 069 @CollectionSize.Require(ZERO) 070 public void testEmptySetFirst() { 071 try { 072 sortedSet.first(); 073 fail(); 074 } catch (NoSuchElementException e) { 075 } 076 } 077 078 @CollectionSize.Require(ZERO) 079 public void testEmptySetLast() { 080 try { 081 sortedSet.last(); 082 fail(); 083 } catch (NoSuchElementException e) { 084 } 085 } 086 087 @CollectionSize.Require(ONE) 088 public void testSingletonSetFirst() { 089 assertEquals(a, sortedSet.first()); 090 } 091 092 @CollectionSize.Require(ONE) 093 public void testSingletonSetLast() { 094 assertEquals(a, sortedSet.last()); 095 } 096 097 @CollectionSize.Require(SEVERAL) 098 public void testFirst() { 099 assertEquals(a, sortedSet.first()); 100 } 101 102 @CollectionSize.Require(SEVERAL) 103 public void testLast() { 104 assertEquals(c, sortedSet.last()); 105 } 106}