import unittest

from pytest import raises

from twilio.twiml import format_language, lower_camel, TwiMLException, TwiML


class TwilioTest(unittest.TestCase):
    def strip(self, xml):
        return str(xml)

    def test_append_fail(self):
        with raises(TwiMLException):
            t = TwiML()
            t.append(12345)

    def test_format_language_none(self):
        language = None
        self.assertEqual(language, format_language(language))

    def test_format_language_valid(self):
        language = "en-US"
        self.assertEqual(language, format_language(language))

    def test_format_language_coerced(self):
        language = "EN_us"
        self.assertEqual("en-US", format_language(language))

    def test_format_language_fail(self):
        with raises(TwiMLException):
            format_language("this is invalid")

    def test_lower_camel_empty_string(self):
        self.assertEqual("", lower_camel(""))

    def test_lower_camel_none(self):
        self.assertEqual(None, lower_camel(None))

    def test_lower_camel_single_word(self):
        self.assertEqual("foo", lower_camel("foo"))

    def test_lower_camel_double_word(self):
        self.assertEqual("fooBar", lower_camel("foo_bar"))

    def test_lower_camel_multi_word(self):
        self.assertEqual("fooBarBaz", lower_camel("foo_bar_baz"))

    def test_lower_camel_multi_word_mixed_case(self):
        self.assertEqual("fooBarBaz", lower_camel("foO_Bar_baz"))

    def test_lower_camel_camel_cased(self):
        self.assertEqual("fooBar", lower_camel("fooBar"))

    def test_utf8_encoding(self):
        t = TwiML()
        t.value = "An utf-8 character: ñ"
        self.assertEqual(
            t.to_xml(),
            '<?xml version="1.0" encoding="UTF-8"?><TwiML>An utf-8 character: ñ</TwiML>',
        )