public function testAddWithSemiColonTwoNumberString()
 {
     $result = $this->stringCalculator->add("//;\n1;2");
     $this->assertEquals(3, $result);
 }
 public function test_extract_with_any_lenght_multiple_custom_delimiters()
 {
     $this->assertEquals(6, $this->calculator->add('//[***][%%%]\\n1***2%%%3'));
 }