1<?php
2
3/**
4 * Hoa
5 *
6 *
7 * @license
8 *
9 * New BSD License
10 *
11 * Copyright © 2007-2017, Hoa community. All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions are met:
15 *     * Redistributions of source code must retain the above copyright
16 *       notice, this list of conditions and the following disclaimer.
17 *     * Redistributions in binary form must reproduce the above copyright
18 *       notice, this list of conditions and the following disclaimer in the
19 *       documentation and/or other materials provided with the distribution.
20 *     * Neither the name of the Hoa nor the names of its contributors may be
21 *       used to endorse or promote products derived from this software without
22 *       specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37namespace Hoa\Iterator\Test\Unit;
38
39use Hoa\Iterator as LUT;
40use Hoa\Test;
41
42/**
43 * Class \Hoa\Iterator\Test\Unit\Lookahead.
44 *
45 * Test suite of the look ahead iterator.
46 *
47 * @copyright  Copyright © 2007-2017 Hoa community
48 * @license    New BSD License
49 */
50class Lookahead extends Test\Unit\Suite
51{
52    public function case_traverse()
53    {
54        $this
55            ->given(
56                $iterator  = new LUT\Map(['a', 'b', 'c']),
57                $lookahead = new LUT\Lookahead($iterator)
58            )
59            ->when($result = iterator_to_array($iterator))
60            ->then
61                ->array($result)
62                    ->isEqualTo(['a', 'b', 'c']);
63    }
64
65    public function case_check_ahead()
66    {
67        $this
68            ->given(
69                $iterator  = new LUT\Map(['a', 'b', 'c']),
70                $lookahead = new LUT\Lookahead($iterator)
71            )
72            ->when(
73                $lookahead->rewind(),
74                $key     = $lookahead->key(),
75                $current = $lookahead->current(),
76                $hasNext = $lookahead->hasNext(),
77                $next    = $lookahead->getNext()
78            )
79            ->then
80                ->integer($key)
81                    ->isEqualTo(0)
82                ->string($current)
83                    ->isEqualTo('a')
84                ->boolean($hasNext)
85                    ->isTrue()
86                ->string($next)
87                    ->isEqualTo('b')
88
89            ->when(
90                $lookahead->next(),
91                $key     = $lookahead->key(),
92                $current = $lookahead->current(),
93                $hasNext = $lookahead->hasNext(),
94                $next    = $lookahead->getNext()
95            )
96            ->then
97                ->integer($key)
98                    ->isEqualTo(1)
99                ->string($current)
100                    ->isEqualTo('b')
101                ->boolean($hasNext)
102                    ->isTrue()
103                ->string($next)
104                    ->isEqualTo('c')
105
106            ->when(
107                $lookahead->next(),
108                $key     = $lookahead->key(),
109                $current = $lookahead->current(),
110                $hasNext = $lookahead->hasNext(),
111                $next    = $lookahead->getNext()
112            )
113            ->then
114                ->integer($key)
115                    ->isEqualTo(2)
116                ->string($current)
117                    ->isEqualTo('c')
118                ->boolean($hasNext)
119                    ->isFalse()
120                ->variable($next)
121                    ->isNull();
122    }
123
124    public function case_double_rewind()
125    {
126        $this
127            ->given(
128                $iterator  = new LUT\Map(['a', 'b', 'c']),
129                $lookahead = new LUT\Lookahead($iterator)
130            )
131            ->when(
132                $lookahead->rewind(),
133                $key     = $lookahead->key(),
134                $current = $lookahead->current(),
135                $hasNext = $lookahead->hasNext(),
136                $next    = $lookahead->getNext()
137            )
138            ->then
139                ->integer($key)
140                    ->isEqualTo(0)
141                ->string($current)
142                    ->isEqualTo('a')
143                ->boolean($hasNext)
144                    ->isTrue()
145                ->string($next)
146                    ->isEqualTo('b')
147
148            ->when(
149                $lookahead->rewind(),
150                $key     = $lookahead->key(),
151                $current = $lookahead->current(),
152                $hasNext = $lookahead->hasNext(),
153                $next    = $lookahead->getNext()
154            )
155            ->then
156                ->integer($key)
157                    ->isEqualTo(0)
158                ->string($current)
159                    ->isEqualTo('a')
160                ->boolean($hasNext)
161                    ->isTrue()
162                ->string($next)
163                    ->isEqualTo('b');
164    }
165
166    public function case_empty()
167    {
168        $this
169            ->given(
170                $iterator  = new LUT\Mock(),
171                $lookahead = new LUT\Lookahead($iterator)
172            )
173            ->when(
174                $lookahead->rewind(),
175                $valid = $lookahead->valid()
176            )
177            ->then
178                ->boolean($valid)
179                    ->isFalse();
180    }
181}
182