public function testFormatWithPreferredCarrierCode()
{
// We only support this for AR in our test metadata.
$arNumber = new PhoneNumber();
$arNumber->setCountryCode(54)->setNationalNumber(91234125678);
// Test formatting with no preferred carrier code stored in the number itself.
$this->assertEquals("01234 15 12-5678", $this->phoneUtil->formatNationalNumberWithPreferredCarrierCode($arNumber, "15"));
$this->assertEquals("01234 12-5678", $this->phoneUtil->formatNationalNumberWithPreferredCarrierCode($arNumber, ""));
// Test formatting with preferred carrier code present.
$arNumber->setPreferredDomesticCarrierCode("19");
$this->assertEquals("01234 12-5678", $this->phoneUtil->format($arNumber, PhoneNumberFormat::NATIONAL));
$this->assertEquals("01234 19 12-5678", $this->phoneUtil->formatNationalNumberWithPreferredCarrierCode($arNumber, "15"));
$this->assertEquals("01234 19 12-5678", $this->phoneUtil->formatNationalNumberWithPreferredCarrierCode($arNumber, ""));
// When the preferred_domestic_carrier_code is present (even when it contains an empty string),
// use it instead of the default carrier code passed in.
$arNumber->setPreferredDomesticCarrierCode("");
$this->assertEquals("01234 12-5678", $this->phoneUtil->formatNationalNumberWithPreferredCarrierCode($arNumber, "15"));
// We don't support this for the US so there should be no change.
$usNumber = new PhoneNumber();
$usNumber->setCountryCode(1)->setNationalNumber(4241231234)->setPreferredDomesticCarrierCode("99");
$this->assertEquals("424 123 1234", $this->phoneUtil->format($usNumber, PhoneNumberFormat::NATIONAL));
$this->assertEquals("424 123 1234", $this->phoneUtil->formatNationalNumberWithPreferredCarrierCode($usNumber, "15"));
}
