getMutation() public method

Replace T_INC (++) with T_DEC (--)
public getMutation ( array $tokens, integer $index ) : array
$tokens array
$index integer
return array
 public function testReturnsTokenEquivalentToDecrementOperator()
 {
     $mutation = new OperatorIncrement(10);
     $this->assertEquals(array(10 => array(T_DEC, '--')), $mutation->getMutation(array(), 10));
 }