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[autoinstallsdev/mediawiki.git] / tests / phpunit / includes / libs / SamplingStatsdClientTest.php

diff --git a/tests/phpunit/includes/libs/SamplingStatsdClientTest.php b/tests/phpunit/includes/libs/SamplingStatsdClientTest.php
new file mode 100644 (file)
index 0000000..c5bc03e
--- /dev/null
+++ b/tests/phpunit/includes/libs/SamplingStatsdClientTest.php
@@ -0,0 +1,67 @@
+<?php
+
+use Liuggio\StatsdClient\Entity\StatsdData;
+use Liuggio\StatsdClient\Sender\SenderInterface;
+
+class SamplingStatsdClientTest extends PHPUnit_Framework_TestCase {
+       /**
+        * @dataProvider samplingDataProvider
+        */
+       public function testSampling( $data, $sampleRate, $seed, $expectWrite ) {
+               $sender = $this->getMockBuilder( SenderInterface::class )->getMock();
+               $sender->expects( $this->any() )->method( 'open' )->will( $this->returnValue( true ) );
+               if ( $expectWrite ) {
+                       $sender->expects( $this->once() )->method( 'write' )
+                               ->with( $this->anything(), $this->equalTo( $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 /*0.44*/, true ],
+                       [ $sampled, 1, 0 /*0.44*/, false ],
+                       [ $sampled, 1, 4 /*0.03*/, true ],
+                       [ $unsampled, 0.1, 0 /*0.44*/, false ],
+                       [ $sampled, 0.5, 0 /*0.44*/, false ],
+                       [ $sampled, 0.5, 4 /*0.03*/, 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->getMockBuilder( SenderInterface::class )->getMock();
+               $sender->expects( $this->any() )->method( 'open' )->will( $this->returnValue( true ) );
+               $sender->expects( $this->once() )->method( 'write' )->with( $this->anything(),
+                       $this->equalTo( $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 );
+       }
+}