tests/phpunit/includes/libs/SamplingStatsdClientTest.php

   1 <?php
   2
   3 use Liuggio\StatsdClient\Entity\StatsdData;
   4 use Liuggio\StatsdClient\Sender\SenderInterface;
   5
   6 class SamplingStatsdClientTest extends PHPUnit_Framework_TestCase {
   7         /**
   8          * @dataProvider samplingDataProvider
   9          */
  10         public function testSampling( $data, $sampleRate, $seed, $expectWrite ) {
  11                 $sender = $this->getMockBuilder( SenderInterface::class )->getMock();
  12                 $sender->expects( $this->any() )->method( 'open' )->will( $this->returnValue( true ) );
  13                 if ( $expectWrite ) {
  14                         $sender->expects( $this->once() )->method( 'write' )
  15                                 ->with( $this->anything(), $this->equalTo( $data ) );
  16                 } else {
  17                         $sender->expects( $this->never() )->method( 'write' );
  18                 }
  19                 mt_srand( $seed );
  20                 $client = new SamplingStatsdClient( $sender );
  21                 $client->send( $data, $sampleRate );
  22         }
  23
  24         public function samplingDataProvider() {
  25                 $unsampled = new StatsdData();
  26                 $unsampled->setKey( 'foo' );
  27                 $unsampled->setValue( 1 );
  28
  29                 $sampled = new StatsdData();
  30                 $sampled->setKey( 'foo' );
  31                 $sampled->setValue( 1 );
  32                 $sampled->setSampleRate( '0.1' );
  33
  34                 return [
  35                         // $data, $sampleRate, $seed, $expectWrite
  36                         [ $unsampled, 1, 0 /*0.44*/, true ],
  37                         [ $sampled, 1, 0 /*0.44*/, false ],
  38                         [ $sampled, 1, 4 /*0.03*/, true ],
  39                         [ $unsampled, 0.1, 0 /*0.44*/, false ],
  40                         [ $sampled, 0.5, 0 /*0.44*/, false ],
  41                         [ $sampled, 0.5, 4 /*0.03*/, false ],
  42                 ];
  43         }
  44
  45         public function testSetSamplingRates() {
  46                 $matching = new StatsdData();
  47                 $matching->setKey( 'foo.bar' );
  48                 $matching->setValue( 1 );
  49
  50                 $nonMatching = new StatsdData();
  51                 $nonMatching->setKey( 'oof.bar' );
  52                 $nonMatching->setValue( 1 );
  53
  54                 $sender = $this->getMockBuilder( SenderInterface::class )->getMock();
  55                 $sender->expects( $this->any() )->method( 'open' )->will( $this->returnValue( true ) );
  56                 $sender->expects( $this->once() )->method( 'write' )->with( $this->anything(),
  57                         $this->equalTo( $nonMatching ) );
  58
  59                 $client = new SamplingStatsdClient( $sender );
  60                 $client->setSamplingRates( [ 'foo.*' => 0.2 ] );
  61
  62                 mt_srand( 0 ); // next random is 0.44
  63                 $client->send( $matching );
  64                 mt_srand( 0 );
  65                 $client->send( $nonMatching );
  66         }
  67 }