/**
  * @dataProvider purgeProvider
  */
 public function testSetPurge($a, $b, $c, $d)
 {
     $ok = $this->object->setPurge($a);
     $this->assertEquals($b, $ok);
     $o = $this->object->getOptions();
     if (!is_null($a)) {
         $this->assertArrayHasKey('PurgeAndReplace', $o);
         $this->assertEquals($c, $o['PurgeAndReplace']);
         $check = parseLog();
         $this->assertEquals($d, $check[1]);
     } else {
         $this->assertArrayNotHasKey('PurgeAndReplace', $o);
     }
 }