<?php
class StatTest extends PHPUnit_Framework_TestCase
{
/**
* All possible values should be > 30% but less than 170%
*
* This also catches 0 and 1000
*/
public function testDistribution()
{
$integers = array_fill(0, 100, 0);
for ($i = 0; $i < 10000; ++$i) {
++$integers[random_int(0,99)];
}
for ($i = 0; $i < 100; ++$i) {
$this->assertFalse($integers[$i] < 30);
$this->assertFalse($integers[$i] > 170);
}
}
/**
* This should be between 55% and 75%, always
*/
public function testCoverage()
{
$integers = array_fill(0, 2000, 0);
for ($i = 0; $i < 2000; ++$i) {
++$integers[random_int(0,1999)];
}
$coverage = 0;
for ($i = 0; $i < 2000; ++$i) {
if ($integers[$i] > 0) {
++$coverage;
}
}
$this->assertTrue($coverage >= 1150);
$this->assertTrue($coverage <= 1350);
}
public function testCompressionRatios()
{
$some_bytes = random_bytes(65536);
$compressed = gzcompress($some_bytes, 9);
if (function_exists('mb_strlen')) {
$length = mb_strlen($compressed, '8bit');
} else {
$length = strlen($compressed);
}
$this->assertTrue($length >= 65000 && $length <= 67000);
}
}
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