# test_numberwords.py
# -------------------
# By MWC Contributors
# Run this file to test your implementation of numberwords.py

import unittest
from numberwords import (
    int_under_10_to_str, 
    int_under_20_to_str, 
    int_under_100_to_str, 
    int_under_1000_to_str,
    int_under_1000000_to_str,
)

class TestIntToStr(unittest.TestCase):
    cases = [
        [int_under_10_to_str, 0, 'zero'], 
        [int_under_10_to_str, 3, 'three'], 
        [int_under_10_to_str, 9, 'nine'], 
        [int_under_20_to_str, 9, 'nine'], 
        [int_under_20_to_str, 10, 'ten'],
        [int_under_20_to_str, 11, 'eleven'], 
        [int_under_20_to_str, 18, 'eighteen'], 
        [int_under_100_to_str, 18, 'eighteen'], 
        [int_under_100_to_str, 43, 'forty-three'], 
        [int_under_100_to_str, 60, 'sixty'], 
        [int_under_100_to_str, 89, 'eighty-nine'], 
        [int_under_1000_to_str, 89, 'eighty-nine'], 
        [int_under_1000_to_str, 100, 'one hundred'], 
        [int_under_1000_to_str, 212, 'two hundred and twelve'], 
        [int_under_1000_to_str, 755, 'seven hundred and fifty-five'], 
        [int_under_1000000_to_str, 1000, 'one thousand'], 
        [int_under_1000000_to_str, 1001, 'one thousand one'], 
        [int_under_1000000_to_str, 1672, 'one thousand six hundred and seventy-two'], 
        [int_under_1000000_to_str, 10000, 'ten thousand'], 
        [int_under_1000000_to_str, 588567, 'five hundred and ninety-eight thousand five hundred and sixty-seven'],
    ]

    def test_converts_integer_to_string(self):
        for function, argument, expected in self.cases:
            observed = function(argument)
            with self.subTest(msg=function.__name__):
                self.assertEqual(observed, expected)

unittest.main()