Test regressions for the task extension

* tests for testing regression of 19ad64a
* fix edge case for test running within 3 minutes of the start of the hour

tests/test_ext_tasks.py

@@ -0,0 +1,77 @@
+# -*- coding: utf-8 -*-
+
+"""
+
+Tests for discord.ext.tasks
+
+"""
+
+import asyncio
+import datetime
+
+import pytest
+
+from discord import utils
+from discord.ext import tasks
+
+
+@pytest.mark.asyncio
+async def test_explicit_initial_runs_tomorrow_single():
+    now = utils.utcnow()
+
+    if not ((0, 4) < (now.hour, now.minute) < (23, 59)):
+        await asyncio.sleep(5 * 60)  # sleep for 5 minutes
+
+    now = utils.utcnow()
+
+    has_run = False
+
+    async def inner():
+        nonlocal has_run
+        has_run = True
+
+    time = utils.utcnow() - datetime.timedelta(minutes=1)
+
+    # a loop that should have an initial run tomorrow
+    loop = tasks.loop(time=datetime.time(hour=time.hour, minute=time.minute))(inner)
+
+    loop.start()
+    await asyncio.sleep(1)
+
+    try:
+        assert not has_run
+    finally:
+        loop.cancel()
+
+
+@pytest.mark.asyncio
+async def test_explicit_initial_runs_tomorrow_multi():
+    now = utils.utcnow()
+
+    if not ((0, 4) < (now.hour, now.minute) < (23, 59)):
+        await asyncio.sleep(5 * 60)  # sleep for 5 minutes
+
+    now = utils.utcnow()
+
+    # multiple times that are in the past for today
+    times = []
+    for _ in range(3):
+        now -= datetime.timedelta(minutes=1)
+        times.append(datetime.time(hour=now.hour, minute=now.minute))
+
+    has_run = False
+
+    async def inner():
+        nonlocal has_run
+        has_run = True
+
+    # a loop that should have an initial run tomorrow
+    loop = tasks.loop(time=times)(inner)
+
+    loop.start()
+    await asyncio.sleep(1)
+
+    try:
+        assert not has_run
+    finally:
+        loop.cancel()