public function testGettersAndSetters()
 {
     $palindrome = new Palindrome();
     $palindrome->setId(1);
     $palindrome->setString("test");
     $palindrome->setIsPalindrome(false);
     $this->assertEquals($palindrome->getId(), 1);
     $this->assertEquals($palindrome->getString(), "test");
     $this->assertEquals($palindrome->isPalindrome(), false);
 }