PoolCounterTest.php

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<?php

// We will use this class with getMockForAbstractClass to create a concrete mock class.
// That call will die if the contructor is not public, unless we use disableOriginalConstructor(),
// in which case we could not test the constructor.
abstract class PoolCounterAbstractMock extends PoolCounter {
    public function __construct() {
        call_user_func_array( 'parent::__construct', func_get_args() );
    }
}

class PoolCounterTest extends MediaWikiTestCase {
    public function testConstruct() {
        $poolCounterConfig = array(
            'class' => 'PoolCounterMock',
            'timeout' => 10,
            'workers' => 10,
            'maxqueue' => 100,
        );

        $poolCounter = $this->getMockBuilder( 'PoolCounterAbstractMock' )
            ->setConstructorArgs( array( $poolCounterConfig, 'testCounter', 'someKey' ) )
            // don't mock anything - the proper syntax would be setMethods(null), but due
            // to a PHPUnit bug that does not work with getMockForAbstractClass()
            ->setMethods( array( 'idontexist' ) )
            ->getMockForAbstractClass();
        $this->assertInstanceOf( 'PoolCounter', $poolCounter );
    }

    public function testConstructWithSlots() {
        $poolCounterConfig = array(
            'class' => 'PoolCounterMock',
            'timeout' => 10,
            'workers' => 10,
            'slots' => 2,
            'maxqueue' => 100,
        );

        $poolCounter = $this->getMockBuilder( 'PoolCounterAbstractMock' )
            ->setConstructorArgs( array( $poolCounterConfig, 'testCounter', 'key' ) )
            ->setMethods( array( 'idontexist' ) ) // don't mock anything
            ->getMockForAbstractClass();
        $this->assertInstanceOf( 'PoolCounter', $poolCounter );
    }

    public function testHashKeyIntoSlots() {
        $poolCounter = $this->getMockBuilder( 'PoolCounterAbstractMock' )
            // don't mock anything - the proper syntax would be setMethods(null), but due
            // to a PHPUnit bug that does not work with getMockForAbstractClass()
            ->setMethods( array( 'idontexist' ) )
            ->disableOriginalConstructor()
            ->getMockForAbstractClass();

        $hashKeyIntoSlots = new ReflectionMethod( $poolCounter, 'hashKeyIntoSlots' );
        $hashKeyIntoSlots->setAccessible( true );

        $keysWithTwoSlots = $keysWithFiveSlots = array();
        foreach ( range( 1, 100 ) as $i ) {
            $keysWithTwoSlots[] = $hashKeyIntoSlots->invoke( $poolCounter, 'key ' . $i, 2 );
            $keysWithFiveSlots[] = $hashKeyIntoSlots->invoke( $poolCounter, 'key ' . $i, 5 );
        }

        $this->assertArrayEquals( range( 0, 1 ), array_unique( $keysWithTwoSlots ) );
        $this->assertArrayEquals( range( 0, 4 ), array_unique( $keysWithFiveSlots ) );

        // make sure it is deterministic
        $this->assertEquals(
            $hashKeyIntoSlots->invoke( $poolCounter, 'asdfgh', 1000 ),
            $hashKeyIntoSlots->invoke( $poolCounter, 'asdfgh', 1000 )
        );
    }
}