import pytest

from src.postprocessing_funcs import (InvalidDateException,
                                      convert_to_us_date_format)


class TestConvertToUSDateFormat:
    def test_convert_to_us_date_format_valid(self):
        assert convert_to_us_date_format("2023-12-01") == "12/01/2023"
        assert convert_to_us_date_format("2023-01-12") == "01/12/2023"
        assert convert_to_us_date_format("2023-13-01") == "01/13/2023"

    def test_convert_to_us_date_format_invalid(self):
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("2023-13-32")
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("2023-00-01")
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("2023-12-00")
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("2023-12-32")
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("2023-13-13")

    def test_convert_to_us_date_format_empty(self):
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("")
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("N/A")
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("null")
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("none")

    def test_convert_to_us_date_format_invalid_format(self):
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("2023/12/01")
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("12-01-2023")
        with pytest.raises(InvalidDateException):
            convert_to_us_date_format("2023.12.01")
    
    def test_convert_to_us_date_format_invalid_type(self):
        with pytest.raises(TypeError):
            convert_to_us_date_format(None)