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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.hc.core5.http.config;
29  
30  import org.hamcrest.CoreMatchers;
31  import org.hamcrest.MatcherAssert;
32  import org.junit.Test;
33  
34  /**
35   * Tests for {@link NamedElementChain}.
36   */
37  public class TestNamedElementChain {
38  
39      @Test
40      public void testBasics() {
41          final NamedElementChain<Character> list = new NamedElementChain<>();
42          MatcherAssert.assertThat(list.getFirst(), CoreMatchers.nullValue());
43          MatcherAssert.assertThat(list.getLast(), CoreMatchers.nullValue());
44  
45          final NamedElementChain<Character>.Node nodeA = list.addFirst('a', "a");
46  
47          MatcherAssert.assertThat(list.getFirst(), CoreMatchers.sameInstance(nodeA));
48          MatcherAssert.assertThat(list.getLast(), CoreMatchers.sameInstance(nodeA));
49  
50          final NamedElementChain<Character>.Node nodeB = list.addLast('b', "b");
51  
52          MatcherAssert.assertThat(list.getFirst(), CoreMatchers.sameInstance(nodeA));
53          MatcherAssert.assertThat(list.getLast(), CoreMatchers.sameInstance(nodeB));
54  
55          final NamedElementChain<Character>.Node nodeZ = list.addLast('z', "z");
56  
57          MatcherAssert.assertThat(list.getFirst(), CoreMatchers.sameInstance(nodeA));
58          MatcherAssert.assertThat(list.getLast(), CoreMatchers.sameInstance(nodeZ));
59  
60          MatcherAssert.assertThat(nodeA.getPrevious(), CoreMatchers.nullValue());
61          MatcherAssert.assertThat(nodeA.getNext(), CoreMatchers.sameInstance(nodeB));
62          MatcherAssert.assertThat(nodeB.getPrevious(), CoreMatchers.sameInstance(nodeA));
63          MatcherAssert.assertThat(nodeB.getNext(), CoreMatchers.sameInstance(nodeZ));
64          MatcherAssert.assertThat(nodeZ.getPrevious(), CoreMatchers.sameInstance(nodeB));
65          MatcherAssert.assertThat(nodeZ.getNext(), CoreMatchers.nullValue());
66  
67          final NamedElementChain<Character>.Node nodeD = list.addAfter("b", 'd', "d");
68          MatcherAssert.assertThat(nodeD.getPrevious(), CoreMatchers.sameInstance(nodeB));
69          MatcherAssert.assertThat(nodeD.getNext(), CoreMatchers.sameInstance(nodeZ));
70          MatcherAssert.assertThat(nodeB.getNext(), CoreMatchers.sameInstance(nodeD));
71          MatcherAssert.assertThat(nodeZ.getPrevious(), CoreMatchers.sameInstance(nodeD));
72  
73          final NamedElementChain<Character>.Node nodeC = list.addBefore("d", 'c', "c");
74          MatcherAssert.assertThat(nodeC.getPrevious(), CoreMatchers.sameInstance(nodeB));
75          MatcherAssert.assertThat(nodeC.getNext(), CoreMatchers.sameInstance(nodeD));
76          MatcherAssert.assertThat(nodeB.getNext(), CoreMatchers.sameInstance(nodeC));
77          MatcherAssert.assertThat(nodeD.getPrevious(), CoreMatchers.sameInstance(nodeC));
78          MatcherAssert.assertThat(list.getSize(), CoreMatchers.equalTo(5));
79  
80          MatcherAssert.assertThat(list.remove("a"), CoreMatchers.is(true));
81          MatcherAssert.assertThat(list.remove("z"), CoreMatchers.is(true));
82          MatcherAssert.assertThat(list.remove("c"), CoreMatchers.is(true));
83          MatcherAssert.assertThat(list.remove("c"), CoreMatchers.is(false));
84          MatcherAssert.assertThat(list.remove("blah"), CoreMatchers.is(false));
85  
86          MatcherAssert.assertThat(list.getFirst(), CoreMatchers.sameInstance(nodeB));
87          MatcherAssert.assertThat(list.getLast(), CoreMatchers.sameInstance(nodeD));
88  
89          MatcherAssert.assertThat(list.getSize(), CoreMatchers.equalTo(2));
90          MatcherAssert.assertThat(list.addBefore("blah", 'e', "e"), CoreMatchers.nullValue());
91          MatcherAssert.assertThat(list.getSize(), CoreMatchers.equalTo(2));
92  
93          MatcherAssert.assertThat(list.addAfter("yada", 'e', "e"), CoreMatchers.nullValue());
94          MatcherAssert.assertThat(list.getSize(), CoreMatchers.equalTo(2));
95      }
96  
97  }