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<?php
/**
* Copyright 2019 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
include 'vendor/autoload.php';
use PHPUnit\Framework\TestCase;
use Google\CRC32\CRC32;
require 'DataIterator.php';
final class CRC32Test extends TestCase
{
public function crcs()
{
return new CRCIterator();
}
public function data()
{
return new DataIterator();
}
/**
* @dataProvider data
*/
public function testHash($crc_class, $poly, $input, $expected)
{
$crc = new $crc_class($poly);
$crc->update($input);
$this->assertEquals(
$expected,
$crc->hash(false),
'hash(' . $input . ')'
);
$this->assertEquals(
$expected,
$crc->hash(false),
'hash(' . $input . ') again'
);
}
/**
* @dataProvider data
*/
public function testHashRaw($crc_class, $poly, $input, $expected)
{
$crc = new $crc_class($poly);
$crc->update($input);
$this->assertEquals(
hex2bin($expected),
$crc->hash(true),
'hash(' . $input . ', true)'
);
}
/**
* Extended hashing. Read increasingly sized chunks of input.
* @dataProvider data
*/
public function testExtendedHash($crc_class, $poly, $input, $expected)
{
$crc = new $crc_class($poly);
$start = 0;
$len = 1;
while ($start < strlen($input)) {
$chunk = substr($input, $start, $len);
$crc->update($chunk);
$start += $len;
$len *= 2;
}
$this->assertEquals(
$expected,
$crc->hash(),
'hash(' . $input . ')'
);
}
/**
* @dataProvider crcs
*/
public function testReset($crc_class, $poly)
{
$data = array(
'abc' => array(
CRC32::IEEE => '352441c2',
CRC32::CASTAGNOLI => '364b3fb7'),
'abcdef' => array(
CRC32::IEEE => '4b8e39ef',
CRC32::CASTAGNOLI => '53bceff1'),
);
$crc = new $crc_class($poly);
$this->assertEquals('00000000', $crc->hash());
$crc->update('abc');
$this->assertEquals($data['abc'][$poly], $crc->hash());
$crc->reset();
$this->assertEquals('00000000', $crc->hash());
$crc->update('abcdef');
$this->assertEquals($data['abcdef'][$poly], $crc->hash());
}
/**
* @dataProvider crcs
*/
public function testClone($crc_class, $poly)
{
$data = array(
'abc' => array(
CRC32::IEEE => '352441c2',
CRC32::CASTAGNOLI => '364b3fb7'),
'abcdefgh' => array(
CRC32::IEEE => 'aeef2a50',
CRC32::CASTAGNOLI => '0a9421b7'),
);
$a = new $crc_class($poly);
$a->update('abc');
$b = clone $a;
$b->update('defgh');
// $b should be updated, but $a should stay the same.
$this->assertEquals(
$data['abc'][$poly],
$a->hash(),
'$a->update("abc")'
);
$this->assertEquals(
$data['abcdefgh'][$poly],
$b->hash(),
'clone($a)->update("abcdefgh")'
);
}
}
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