Refactor create_pages.py and write tests

tests/test_parse.py

@@ -0,0 +1,68 @@
+from datetime import datetime
+
+import tzlocal
+
+from discord_reminder_bot.parse import ParsedTime, parse_time
+
+
+def test_parse_time() -> None:
+    """Test the parse_time function."""
+    parsed_time: ParsedTime = parse_time("18 January 2040")
+    assert parsed_time.err is False
+    assert not parsed_time.err_msg
+    assert parsed_time.date_to_parse == "18 January 2040"
+    assert parsed_time.parsed_time
+    assert parsed_time.parsed_time.strftime("%Y-%m-%d %H:%M:%S") == "2040-01-18 00:00:00"
+
+    parsed_time: ParsedTime = parse_time("18 January 2040 12:00")
+    assert parsed_time.err is False
+    assert not parsed_time.err_msg
+    assert parsed_time.date_to_parse == "18 January 2040 12:00"
+    assert parsed_time.parsed_time
+    assert parsed_time.parsed_time.strftime("%Y-%m-%d %H:%M:%S") == "2040-01-18 12:00:00"
+
+    parsed_time: ParsedTime = parse_time("18 January 2040 12:00:00")
+    assert parsed_time.err is False
+    assert not parsed_time.err_msg
+    assert parsed_time.date_to_parse == "18 January 2040 12:00:00"
+    assert parsed_time.parsed_time
+    assert parsed_time.parsed_time.strftime("%Y-%m-%d %H:%M:%S") == "2040-01-18 12:00:00"
+
+    parsed_time: ParsedTime = parse_time("18 January 2040 12:00:00 UTC")
+    assert parsed_time.err is False
+    assert not parsed_time.err_msg
+    assert parsed_time.date_to_parse == "18 January 2040 12:00:00 UTC"
+    assert parsed_time.parsed_time
+    assert parsed_time.parsed_time.strftime("%Y-%m-%d %H:%M:%S") == "2040-01-18 13:00:00"
+
+    parsed_time: ParsedTime = parse_time("18 January 2040 12:00:00 Europe/Stockholm")
+    assert parsed_time.err is True
+    assert parsed_time.err_msg == "Could not parse the date."
+    assert parsed_time.date_to_parse == "18 January 2040 12:00:00 Europe/Stockholm"
+    assert parsed_time.parsed_time is None
+
+
+def test_ParsedTime() -> None:  # noqa: N802
+    """Test the ParsedTime class."""
+    parsed_time: ParsedTime = ParsedTime(
+        err=False,
+        err_msg="",
+        date_to_parse="18 January 2040",
+        parsed_time=datetime(2040, 1, 18, 0, 0, 0, tzinfo=tzlocal.get_localzone()),
+    )
+    assert parsed_time.err is False
+    assert not parsed_time.err_msg
+    assert parsed_time.date_to_parse == "18 January 2040"
+    assert parsed_time.parsed_time
+    assert parsed_time.parsed_time.strftime("%Y-%m-%d %H:%M:%S") == "2040-01-18 00:00:00"
+
+    parsed_time: ParsedTime = ParsedTime(
+        err=True,
+        err_msg="Could not parse the date.",
+        date_to_parse="18 January 2040 12:00:00 Europe/Stockholm",
+        parsed_time=None,
+    )
+    assert parsed_time.err is True
+    assert parsed_time.err_msg == "Could not parse the date."
+    assert parsed_time.date_to_parse == "18 January 2040 12:00:00 Europe/Stockholm"
+    assert parsed_time.parsed_time is None