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<?php
namespace Wikimedia\Tests;
use Liuggio\StatsdClient\Entity\StatsdData;
use Liuggio\StatsdClient\Sender\SenderInterface;
use MediaWikiCoversValidator;
use PHPUnit\Framework\TestCase;
use Wikimedia\Stats\SamplingStatsdClient;
/**
* @covers \Wikimedia\Stats\SamplingStatsdClient
*/
class SamplingStatsdClientTest extends TestCase {
use MediaWikiCoversValidator;
protected function setUp(): void {
parent::setUp();
if ( version_compare( PHP_VERSION, '8.2', '>=' ) ) {
// Tracked on T326386
$this->markTestSkipped( "PHP 8.2 isn't supported for this test" );
}
}
/**
* @dataProvider samplingDataProvider
*/
public function testSampling( $data, $sampleRate, $seed, $expectWrite ) {
$sender = $this->createMock( SenderInterface::class );
$sender->method( 'open' )->willReturn( true );
if ( $expectWrite ) {
$sender->expects( $this->once() )->method( 'write' )
->with( $this->anything(), $data );
} else {
$sender->expects( $this->never() )->method( 'write' );
}
mt_srand( $seed );
$client = new SamplingStatsdClient( $sender );
$client->send( $data, $sampleRate );
}
public function samplingDataProvider() {
$unsampled = new StatsdData();
$unsampled->setKey( 'foo' );
$unsampled->setValue( 1 );
$sampled = new StatsdData();
$sampled->setKey( 'foo' );
$sampled->setValue( 1 );
$sampled->setSampleRate( '0.1' );
return [
// $data, $sampleRate, $seed, $expectWrite
[ $unsampled, 1, 0 /*0.54*/, true ],
[ $sampled, 1, 0 /*0.54*/, false ],
[ $sampled, 1, 7 /*0.07*/, true ],
[ $unsampled, 0.1, 0 /*0.54*/, false ],
[ $sampled, 0.5, 0 /*0.54*/, false ],
[ $sampled, 0.5, 7 /*0.07*/, false ],
];
}
public function testSetSamplingRates() {
$matching = new StatsdData();
$matching->setKey( 'foo.bar' );
$matching->setValue( 1 );
$nonMatching = new StatsdData();
$nonMatching->setKey( 'oof.bar' );
$nonMatching->setValue( 1 );
$sender = $this->createMock( SenderInterface::class );
$sender->method( 'open' )->willReturn( true );
$sender->expects( $this->once() )->method( 'write' )
->with( $this->anything(), $nonMatching );
$client = new SamplingStatsdClient( $sender );
$client->setSamplingRates( [ 'foo.*' => 0.2 ] );
mt_srand( 0 ); // next random is 0.44
$client->send( $matching );
mt_srand( 0 );
$client->send( $nonMatching );
}
}
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