Move get_datetime into own file.

Add test cases to cover get_datetime usage and edge cases.

dakiny_bot/election_utils.py

@@ -0,0 +1,29 @@
+"""Broken out util functions to avoid importing sql during testing."""
+
+import calendar
+from datetime import UTC, datetime
+
+
+def get_datetime(month_day: str) -> datetime:
+    """
+    Takes in a string month and day and returns a datetime object of that Month/Day this year.
+
+    Args:
+        month_day (str): Month/Day in that format.
+
+    Returns:
+        datetime: Datetime representation of Month/Day.
+    """
+    today = datetime.now(tz=UTC).date()
+    year = today.year
+    month = int(month_day.split("/")[0])
+    day = int(month_day.split("/")[1])
+
+    # ensure that year rolls over if current month is December and the next month is less than 12.
+    if today.month == calendar.DECEMBER and month < calendar.OCTOBER:
+        year += 1
+
+    if today.month == calendar.JANUARY and month > calendar.MARCH:
+        year -= 1
+
+    return datetime(year, month, day, tzinfo=UTC)