$this->assertSame( $local, CentralIdLookup::factory( 'local' ) );
$this->assertSame( 'local', $local->getProviderId() );
$local2 = CentralIdLookup::factory( 'local2' );
$this->assertNotSame( $local, $local2 );
$this->assertSame( $local, CentralIdLookup::factory( 'local' ) );
$this->assertSame( 'local', $local->getProviderId() );
$local2 = CentralIdLookup::factory( 'local2' );
$this->assertNotSame( $local, $local2 );