48 lines
1.2 KiB
PHP
48 lines
1.2 KiB
PHP
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<?php
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namespace Szurubooru\Tests\Service;
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class PasswordServiceTest extends \Szurubooru\Tests\AbstractTestCase
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{
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public function testGeneratingPasswords()
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{
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$configMock = $this->mockConfig();
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$passwordService = new \Szurubooru\Services\PasswordService($configMock);
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$sampleCount = 10000;
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$distribution = [];
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for ($i = 0; $i < $sampleCount; $i ++)
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{
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$password = $passwordService->getRandomPassword();
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for ($j = 0; $j < strlen($password); $j ++)
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{
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$c = $password{$j};
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if (!isset($distribution[$j]))
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$distribution[$j] = [$c => 1];
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elseif (!isset($distribution[$j][$c]))
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$distribution[$j][$c] = 1;
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else
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$distribution[$j][$c] ++;
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}
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}
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foreach ($distribution as $index => $characterDistribution)
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{
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$this->assertLessThan(10, $this->getRelativeStandardDeviation($characterDistribution));
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}
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}
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private function getStandardDeviation($sample)
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{
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$mean = array_sum($sample) / count($sample);
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foreach ($sample as $key => $num)
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$devs[$key] = pow($num - $mean, 2);
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return sqrt(array_sum($devs) / (count($devs)));
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}
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private function getRelativeStandardDeviation($sample)
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{
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$mean = array_sum($sample) / count($sample);
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return 100 * $this->getStandardDeviation($sample) / $mean;
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}
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}
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