$logger1 = LoggerFactory::getInstance( 'foo' );
$this->tearDown();
$logger2 = LoggerFactory::getInstance( 'foo' );
$this->assertNotSame( $logger1, $logger2 );
$logger1 = LoggerFactory::getInstance( 'foo' );
$this->tearDown();
$logger2 = LoggerFactory::getInstance( 'foo' );
$this->assertNotSame( $logger1, $logger2 );