tests/phpunit/includes/libs/SamplingStatsdClientTest.php

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