Move settings to a function and add tests

tests/test_misc.py

@@ -0,0 +1,77 @@
+from __future__ import annotations
+
+from datetime import UTC, datetime, timedelta
+from typing import TYPE_CHECKING
+
+from apscheduler.schedulers.background import BackgroundScheduler
+from apscheduler.triggers.date import DateTrigger
+
+from discord_reminder_bot.misc import calc_time, calculate, get_human_time
+
+if TYPE_CHECKING:
+    from apscheduler.job import Job
+
+
+def test_calc_time() -> None:
+    """Test the calc_time function with various datetime inputs."""
+    test_datetime: datetime = datetime(2023, 10, 1, 12, 0, 0, tzinfo=UTC)
+    expected_timestamp: str = f"<t:{int(test_datetime.timestamp())}:R>"
+    assert calc_time(test_datetime) == expected_timestamp
+
+    now: datetime = datetime.now(tz=UTC)
+    expected_timestamp_now: str = f"<t:{int(now.timestamp())}:R>"
+    assert calc_time(now) == expected_timestamp_now
+
+    past_datetime: datetime = datetime(2000, 1, 1, 0, 0, 0, tzinfo=UTC)
+    expected_timestamp_past: str = f"<t:{int(past_datetime.timestamp())}:R>"
+    assert calc_time(past_datetime) == expected_timestamp_past
+
+    future_datetime: datetime = datetime(2100, 1, 1, 0, 0, 0, tzinfo=UTC)
+    expected_timestamp_future: str = f"<t:{int(future_datetime.timestamp())}:R>"
+    assert calc_time(future_datetime) == expected_timestamp_future
+
+
+def test_get_human_time() -> None:
+    """Test the get_human_time function with various timedelta inputs."""
+    test_timedelta = timedelta(days=1, hours=2, minutes=3, seconds=4)
+    expected_output = "1d2h3m4s"
+    assert get_human_time(test_timedelta) == expected_output
+
+    test_timedelta = timedelta(hours=5, minutes=6, seconds=7)
+    expected_output = "5h6m7s"
+    assert get_human_time(test_timedelta) == expected_output
+
+    test_timedelta = timedelta(minutes=8, seconds=9)
+    expected_output = "8m9s"
+    assert get_human_time(test_timedelta) == expected_output
+
+    test_timedelta = timedelta(seconds=10)
+    expected_output = "10s"
+    assert get_human_time(test_timedelta) == expected_output
+
+    test_timedelta = timedelta(days=0, hours=0, minutes=0, seconds=0)
+    expected_output = ""
+    assert get_human_time(test_timedelta) == expected_output
+
+
+def test_calculate() -> None:
+    """Test the calculate function with various job inputs."""
+    scheduler = BackgroundScheduler()
+    scheduler.start()
+
+    # Create a job with a DateTrigger
+    run_date = datetime(2270, 10, 1, 12, 0, 0, tzinfo=UTC)
+    job: Job = scheduler.add_job(lambda: None, trigger=DateTrigger(run_date=run_date), id="test_job", name="Test Job")
+
+    expected_output = "<t:9490737600:R>"
+    assert calculate(job) == expected_output
+
+    # Modify the job to have a next_run_time
+    job.modify(next_run_time=run_date)
+    assert calculate(job) == expected_output
+
+    # Paused job should still return the same output
+    job.pause()
+    assert calculate(job) == expected_output
+
+    scheduler.shutdown()