ContiguousSetNonGwtTest.java revision 1d580d0f6ee4f21eb309ba7b509d2c6d671c4044 
1/*
2 * Copyright (C) 2011 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
17package com.google.common.collect;
18
19import static com.google.common.base.Preconditions.checkArgument;
20import static com.google.common.collect.DiscreteDomains.integers;
21
22import com.google.common.collect.testing.SampleElements;
23import com.google.common.collect.testing.SetTestSuiteBuilder;
24import com.google.common.collect.testing.TestSetGenerator;
25import com.google.common.collect.testing.features.CollectionFeature;
26import com.google.common.collect.testing.features.CollectionSize;
27import com.google.common.collect.testing.testers.SetHashCodeTester;
28
29import junit.framework.Test;
30import junit.framework.TestCase;
31import junit.framework.TestSuite;
32
33import java.util.Collections;
34import java.util.List;
35import java.util.Set;
36import java.util.SortedSet;
37import java.util.TreeSet;
38
39/**
40 * @author Gregory Kick
41 */
42public class ContiguousSetNonGwtTest extends TestCase {
43  public static class BuiltTests extends TestCase {
44    public static Test suite() {
45      TestSuite suite = new TestSuite();
46
47      suite.addTest(
48          SetTestSuiteBuilder
49              .using(
50                  new TestIntegerSetGenerator() {
51                    @Override
52                    protected Set<Integer> create(Integer[] elements) {
53                      // reject duplicates at creation, just so that I can use
54                      // that SetFeature below, which stops a test from running
55                      // that doesn't work. hack!
56                      SortedSet<Integer> set = new TreeSet<Integer>();
57                      Collections.addAll(set, elements);
58                      checkArgument(set.size() == elements.length);
59                      return Ranges.closed(set.first(), set.last()).asSet(integers());
60                    }
61                  })
62              .withFeatures(
63                  CollectionSize.ONE,
64                  CollectionSize.SEVERAL,
65                  CollectionFeature.KNOWN_ORDER,
66                  CollectionFeature.ALLOWS_NULL_QUERIES,
67                  CollectionFeature.NON_STANDARD_TOSTRING,
68                  CollectionFeature.RESTRICTS_ELEMENTS,
69                  CollectionFeature.REJECTS_DUPLICATES_AT_CREATION)
70              .suppressing(SetHashCodeTester.getHashCodeMethods())
71              .named("DiscreteRange.asSet, closed")
72              .createTestSuite());
73
74      return suite;
75    }
76  }
77
78  abstract static class TestIntegerSetGenerator implements TestSetGenerator<Integer> {
79    @Override public SampleElements<Integer> samples() {
80      return new SampleElements<Integer>(1, 2, 3, 4, 5);
81    }
82
83    @Override public Set<Integer> create(Object... elements) {
84      Integer[] array = new Integer[elements.length];
85      int i = 0;
86      for (Object e : elements) {
87        array[i++] = (Integer) e;
88      }
89      return create(array);
90    }
91
92    protected abstract Set<Integer> create(Integer[] elements);
93
94    @Override public Integer[] createArray(int length) {
95      return new Integer[length];
96    }
97
98    @Override public List<Integer> order(List<Integer> insertionOrder) {
99      return Ordering.natural().sortedCopy(insertionOrder);
100    }
101  }
102
103  public void testNothing() {
104    /*
105     * It's a warning if a TestCase subclass contains no tests, so we add one.
106     * Alternatively, we could stop extending TestCase, but I worry that someone
107     * will add a test in the future and not realize that it's being ignored.
108     */
109  }
110}
111