Create date module and tests

Required for translating date elements

aamva/card/date.py

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+from __future__ import annotations
+import datetime
+
+
+COUNTRY_FORMAT = {
+    "Canada": "YYYYMMDD",
+    "Mexico": "YYYYMMDD",  # Assuming this format for Mexico, is untested
+    "USA": "MMDDYYYY"}
+
+
+class Date(datetime.date):
+    @classmethod
+    def parse_country_date(cls, date:str, country:str) -> Date:
+        date_format = COUNTRY_FORMAT[country]
+        year_index = date_format.index("YYYY")
+        month_index = date_format.index("MM")
+        day_index = date_format.index("DD")
+        year = int(date[year_index:year_index + 4])
+        month = int(date[month_index:month_index + 2])
+        day = int(date[day_index:day_index + 2])
+        return Date(year, month, day)
+
+    def unparse_country_date(self, country: str) -> str:
+        return COUNTRY_FORMAT[country] \
+            .replace("YYYY", str(self.year).rjust(4, "0")) \
+            .replace("MM", str(self.month).rjust(2, "0")) \
+            .replace("DD", str(self.day).rjust(2, "0"))

tests/card/test_date.py

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+import pytest
+import datetime
+
+from aamva.card.date import Date
+
+
+testdata_ids = ("Canada's date format", "Mexico's date format", "USA's date format")
+testdata = (
+    # ((unparsed, country, parsed), ...)
+    ("20240512", "Canada", (2024, 5, 12)),
+    ("20240512", "Mexico", (2024, 5, 12)),
+    ("05122024", "USA", (2024, 5, 12)))
+
+
+@pytest.mark.parametrize("unparsed, country, parsed", testdata, ids=testdata_ids)
+def test_can_parse_country_date(unparsed, country, parsed):
+    assert Date.parse_country_date(unparsed, country) == datetime.date(*parsed)
+
+
+@pytest.mark.parametrize("unparsed, country, parsed", testdata, ids=testdata_ids)
+def test_can_unparse_country_date(unparsed, country, parsed):
+    assert Date(*parsed).unparse_country_date(country) == unparsed
+
+
+@pytest.mark.parametrize("unparsed, country, parsed", testdata, ids=testdata_ids)
+def test_can_unparse_country_datetime(unparsed, country, parsed):
+    assert Date.unparse_country_date(datetime.date(*parsed), country) == unparsed