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googleanalytics / lib / analytics-admin / vendor / google / crc32 / tests / CRC32Test.php

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BuiltinTest.php 3 years ago CRC32Test.php 3 years ago DataIterator.php 3 years ago GoogleTest.php 3 years ago

CRC32Test.php

159 lines

1	<?php
2	/**
3	* Copyright 2019 Google LLC
4	*
5	* Licensed under the Apache License, Version 2.0 (the "License");
6	* you may not use this file except in compliance with the License.
7	* You may obtain a copy of the License at
8	*
9	* http://www.apache.org/licenses/LICENSE-2.0
10	*
11	* Unless required by applicable law or agreed to in writing, software
12	* distributed under the License is distributed on an "AS IS" BASIS,
13	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14	* See the License for the specific language governing permissions and
15	* limitations under the License.
16	*/
17
18	include 'vendor/autoload.php';
19
20	use PHPUnit\Framework\TestCase;
21	use Google\CRC32\CRC32;
22
23	require 'DataIterator.php';
24
25	final class CRC32Test extends TestCase
26	{
27	public function crcs()
28	{
29	return new CRCIterator();
30	}
31
32	public function data()
33	{
34	return new DataIterator();
35	}
36
37	/**
38	* @dataProvider data
39	*/
40	public function testHash($crc_class, $poly, $input, $expected)
41	{
42	$crc = new $crc_class($poly);
43	$crc->update($input);
44
45	$this->assertEquals(
46	$expected,
47	$crc->hash(false),
48	'hash(' . $input . ')'
49	);
50
51	$this->assertEquals(
52	$expected,
53	$crc->hash(false),
54	'hash(' . $input . ') again'
55	);
56	}
57
58	/**
59	* @dataProvider data
60	*/
61	public function testHashRaw($crc_class, $poly, $input, $expected)
62	{
63	$crc = new $crc_class($poly);
64	$crc->update($input);
65
66	$this->assertEquals(
67	hex2bin($expected),
68	$crc->hash(true),
69	'hash(' . $input . ', true)'
70	);
71	}
72
73	/**
74	* Extended hashing. Read increasingly sized chunks of input.
75	* @dataProvider data
76	*/
77	public function testExtendedHash($crc_class, $poly, $input, $expected)
78	{
79	$crc = new $crc_class($poly);
80
81	$start = 0;
82	$len = 1;
83	while ($start < strlen($input)) {
84	$chunk = substr($input, $start, $len);
85	$crc->update($chunk);
86
87	$start += $len;
88	$len *= 2;
89	}
90
91	$this->assertEquals(
92	$expected,
93	$crc->hash(),
94	'hash(' . $input . ')'
95	);
96	}
97
98	/**
99	* @dataProvider crcs
100	*/
101	public function testReset($crc_class, $poly)
102	{
103	$data = array(
104	'abc' => array(
105	CRC32::IEEE => '352441c2',
106	CRC32::CASTAGNOLI => '364b3fb7'),
107	'abcdef' => array(
108	CRC32::IEEE => '4b8e39ef',
109	CRC32::CASTAGNOLI => '53bceff1'),
110	);
111
112	$crc = new $crc_class($poly);
113	$this->assertEquals('00000000', $crc->hash());
114
115	$crc->update('abc');
116	$this->assertEquals($data['abc'][$poly], $crc->hash());
117
118	$crc->reset();
119	$this->assertEquals('00000000', $crc->hash());
120
121	$crc->update('abcdef');
122	$this->assertEquals($data['abcdef'][$poly], $crc->hash());
123	}
124
125	/**
126	* @dataProvider crcs
127	*/
128	public function testClone($crc_class, $poly)
129	{
130	$data = array(
131	'abc' => array(
132	CRC32::IEEE => '352441c2',
133	CRC32::CASTAGNOLI => '364b3fb7'),
134	'abcdefgh' => array(
135	CRC32::IEEE => 'aeef2a50',
136	CRC32::CASTAGNOLI => '0a9421b7'),
137	);
138
139	$a = new $crc_class($poly);
140	$a->update('abc');
141
142	$b = clone $a;
143	$b->update('defgh');
144
145	// $b should be updated, but $a should stay the same.
146	$this->assertEquals(
147	$data['abc'][$poly],
148	$a->hash(),
149	'$a->update("abc")'
150	);
151
152	$this->assertEquals(
153	$data['abcdefgh'][$poly],
154	$b->hash(),
155	'clone($a)->update("abcdefgh")'
156	);
157	}
158	}
159