Coverage Summary for Class: SortedSetNavigationTester (com.google.common.collect.testing.testers)

1 /*
2  * Copyright (C) 2010 The Guava Authors
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.google.common.collect.testing.testers;
18 
19 import static com.google.common.collect.testing.features.CollectionSize.ONE;
20 import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
21 import static com.google.common.collect.testing.features.CollectionSize.ZERO;
22 
23 import com.google.common.annotations.GwtCompatible;
24 import com.google.common.collect.testing.Helpers;
25 import com.google.common.collect.testing.features.CollectionSize;
26 import java.util.Collections;
27 import java.util.List;
28 import java.util.NoSuchElementException;
29 import java.util.SortedSet;
30 import org.junit.Ignore;
31 
32 /**
33  * A generic JUnit test which tests operations on a SortedSet. Can't be invoked directly; please see
34  * {@code SortedSetTestSuiteBuilder}.
35  *
36  * @author Jesse Wilson
37  * @author Louis Wasserman
38  */
39 @GwtCompatible
40 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
41 public class SortedSetNavigationTester<E> extends AbstractSetTester<E> {
42 
43   private SortedSet<E> sortedSet;
44   private List<E> values;
45   private E a;
46   private E b;
47   private E c;
48 
49   @Override
50   public void setUp() throws Exception {
51     super.setUp();
52     sortedSet = (SortedSet<E>) getSet();
53     values =
54         Helpers.copyToList(
55             getSubjectGenerator()
56                 .getSampleElements(getSubjectGenerator().getCollectionSize().getNumElements()));
57     Collections.sort(values, sortedSet.comparator());
58 
59     // some tests assume SEVERAL == 3
60     if (values.size() >= 1) {
61       a = values.get(0);
62       if (values.size() >= 3) {
63         b = values.get(1);
64         c = values.get(2);
65       }
66     }
67   }
68 
69   @CollectionSize.Require(ZERO)
70   public void testEmptySetFirst() {
71     try {
72       sortedSet.first();
73       fail();
74     } catch (NoSuchElementException e) {
75     }
76   }
77 
78   @CollectionSize.Require(ZERO)
79   public void testEmptySetLast() {
80     try {
81       sortedSet.last();
82       fail();
83     } catch (NoSuchElementException e) {
84     }
85   }
86 
87   @CollectionSize.Require(ONE)
88   public void testSingletonSetFirst() {
89     assertEquals(a, sortedSet.first());
90   }
91 
92   @CollectionSize.Require(ONE)
93   public void testSingletonSetLast() {
94     assertEquals(a, sortedSet.last());
95   }
96 
97   @CollectionSize.Require(SEVERAL)
98   public void testFirst() {
99     assertEquals(a, sortedSet.first());
100   }
101 
102   @CollectionSize.Require(SEVERAL)
103   public void testLast() {
104     assertEquals(c, sortedSet.last());
105   }
106 }