public function testGetLengthOfNationalDestinationCode()
{
// Google MTV, which has national destination code (NDC) "650".
$this->assertEquals(3, $this->phoneUtil->getLengthOfNationalDestinationCode(self::$usNumber));
// A North America toll-free number, which has NDC "800".
$this->assertEquals(3, $this->phoneUtil->getLengthOfNationalDestinationCode(self::$usTollFree));
// Google London, which has NDC "20".
$this->assertEquals(2, $this->phoneUtil->getLengthOfNationalDestinationCode(self::$gbNumber));
// A UK mobile phone, which has NDC "7912".
$this->assertEquals(4, $this->phoneUtil->getLengthOfNationalDestinationCode(self::$gbMobile));
// Google Buenos Aires, which has NDC "11".
$this->assertEquals(2, $this->phoneUtil->getLengthOfNationalDestinationCode(self::$arNumber));
// An Argentinian mobile which has NDC "911".
$this->assertEquals(3, $this->phoneUtil->getLengthOfNationalDestinationCode(self::$arMobile));
// Google Sydney, which has NDC "2".
$this->assertEquals(1, $this->phoneUtil->getLengthOfNationalDestinationCode(self::$auNumber));
// Google Singapore, which has NDC "6521".
$this->assertEquals(4, $this->phoneUtil->getLengthOfNationalDestinationCode(self::$sgNumber));
// An invalid US number (1 digit shorter), which has no NDC.
$this->assertEquals(0, $this->phoneUtil->getLengthOfNationalDestinationCode(self::$usShortByOneNumber));
// A number containing an invalid country calling code, which shouldn't have any NDC.
$number = new PhoneNumber();
$number->setCountryCode(123)->setNationalNumber(6502530000);
$this->assertEquals(0, $this->phoneUtil->getLengthOfNationalDestinationCode($number));
// An international toll free number, which has NDC "1234".
$this->assertEquals(4, $this->phoneUtil->getLengthOfNationalDestinationCode(self::$internationalTollFree));
}
