/**
  * Returns the full name
  *
  * @return StringLiteral
  */
 public function getFullName()
 {
     $fullNameString = $this->firstName . ($this->middleName->isEmpty() ? '' : ' ' . $this->middleName) . ($this->lastName->isEmpty() ? '' : ' ' . $this->lastName);
     $fullName = new StringLiteral($fullNameString);
     return $fullName;
 }
 public function testIsEmpty()
 {
     $string = new StringLiteral('');
     $this->assertTrue($string->isEmpty());
 }