/**
  * Tests if the validateCallerId method only accept string
  * @param  mixed $sampleType
  * @throws ValidationException
  * @dataProvider typeProvider
  */
 public function testValidateCallerIdThrowingTypeErrors($sampleType)
 {
     if (!is_string($sampleType)) {
         $this->setExpectedException(ValidationException::class, sprintf(MessageValidator::TYPE_ERROR, "string", gettype($sampleType)));
     }
     MessageValidator::validateCallerId($sampleType);
 }