Add tests for `bot.utils.time`.

2 files changed, 52 insertions, 0 deletions

diff --git a/tests/helpers.py b/tests/helpers.py
index 2908294f7..25059fa3a 100644
--- a/tests/helpers.py
+++ b/tests/helpers.py
@@ -7,6 +7,10 @@ __all__ = ('AsyncMock', 'async_test')
 
 
 # TODO: Remove me on 3.8
+# Allows you to mock a coroutine. Since the default `__call__` of `MagicMock`
+# is not a coroutine, trying to mock a coroutine with it will result in errors
+# as the default `__call__` is not awaitable. Use this class for monkeypatching
+# coroutines instead.
 class AsyncMock(MagicMock):
     async def __call__(self, *args, **kwargs):
         return super(AsyncMock, self).__call__(*args, **kwargs)
diff --git a/tests/utils/test_time.py b/tests/utils/test_time.py
new file mode 100644
index 000000000..3d7423a1d
--- /dev/null
+++ b/tests/utils/test_time.py
@@ -0,0 +1,48 @@
+import asyncio
+from datetime import datetime, timezone
+from unittest.mock import patch
+
+import pytest
+from dateutil.relativedelta import relativedelta
+
+from bot.utils import time
+from tests.helpers import AsyncMock
+
+
[email protected](
+    ('delta', 'precision', 'max_units', 'expected'),
+    (
+        (relativedelta(days=2), 'seconds', 1, '2 days'),
+        (relativedelta(days=2, hours=2), 'seconds', 2, '2 days and 2 hours'),
+        (relativedelta(days=2, hours=2), 'seconds', 1, '2 days'),
+        (relativedelta(days=2, hours=2), 'days', 2, '2 days'),
+    )
+)
+def test_humanize_delta(
+        delta: relativedelta,
+        precision: str,
+        max_units: int,
+        expected: str
+):
+    assert time.humanize_delta(delta, precision, max_units) == expected
+
+
[email protected](
+    ('stamp', 'expected'),
+    (
+        ('Sun, 15 Sep 2019 12:00:00 GMT', datetime(2019, 9, 15, 12, 0, 0, tzinfo=timezone.utc)),
+    )
+)
+def test_parse_rfc1123(stamp: str, expected: str):
+    assert time.parse_rfc1123(stamp) == expected
+
+
+@patch('asyncio.sleep', new_callable=AsyncMock)
+def test_wait_until(sleep_patch):
+    start = datetime(2019, 1, 1, 0, 0)
+    then = datetime(2019, 1, 1, 0, 10)
+
+    # No return value
+    assert asyncio.run(time.wait_until(then, start)) is None
+
+    sleep_patch.assert_called_once_with(10 * 60)