1 files changed, 73 insertions, 0 deletions
diff --git a/tests/test_utils.py b/tests/test_utils.py
new file mode 100644
index 00000000..87c8c186
--- /dev/null
+++ b/tests/test_utils.py
@@ -0,0 +1,73 @@
+from datetime import datetime, timedelta, timezone
+
+from tests import SiteTest
+from pysite.utils.time import is_expired, parse_duration
+
+
+class DurationParsingTests(SiteTest):
+    """Tests the `parse_duration` method provided by `pysite.utils.time`."""
+
+    SIMPLE_DURATION_STRINGS = (
+        ('42s', timedelta(seconds=42)),
+        ('12m', timedelta(minutes=12)),
+        ('20h', timedelta(hours=20)),
+        ('7d', timedelta(days=7)),
+        ('2w', timedelta(weeks=2))
+    )
+    COMBINED_DURATION_STRINGS = (
+        ('12m30s', timedelta(minutes=12, seconds=30)),
+        ('20h5m', timedelta(hours=20, minutes=5)),
+        ('7d10h12s', timedelta(days=7, hours=10, seconds=12))
+    )
+
+    def test_simple_duration_string_parsing(self):
+        for duration_string, added_delta in self.SIMPLE_DURATION_STRINGS:
+            timezone_aware_now = datetime.now(timezone.utc)
+            self.assertAlmostEqual(
+                parse_duration(duration_string).timestamp(),
+                (timezone_aware_now + added_delta).timestamp(),
+                places=-1  # Being off by < 10 seconds is acceptable
+            )
+
+    def test_combined_duration_string_parsing(self):
+        for duration_string, added_delta in self.COMBINED_DURATION_STRINGS:
+            timezone_aware_now = datetime.now(timezone.utc)
+            self.assertAlmostEqual(
+                parse_duration(duration_string).timestamp(),
+                (timezone_aware_now + added_delta).timestamp(),
+                places=-1  # Being off by < 10 seconds is acceptable
+            )
+
+    def test_empty_duration_raises_valueerror(self):
+        with self.assertRaises(ValueError):
+            parse_duration('')
+
+    def test_unknown_char_raises_valueerror(self):
+        with self.assertRaises(ValueError):
+            parse_duration('12l')
+
+    def test_valid_unit_without_digits_raises_valueerror(self):
+        with self.assertRaises(ValueError):
+            parse_duration('s')
+
+
+class ExpiryTests(SiteTest):
+    """Tests the `is_expired` method provided by `pysite.utils.time`."""
+
+    EXPIRY_DELTAS = (
+        timedelta(seconds=30),
+        timedelta(minutes=12),
+        timedelta(hours=20),
+        timedelta(days=5),
+        timedelta(weeks=7)
+    )
+
+    def test_datetimes_in_the_past_are_expired(self):
+        for delta in self.EXPIRY_DELTAS:
+            date = datetime.now(timezone.utc) - delta
+            self.assertTrue(is_expired(date))
+
+    def test_datetimes_in_the_future_are_not_expired(self):
+        for delta in self.EXPIRY_DELTAS:
+            date = datetime.now(timezone.utc) + delta
+            self.assertFalse(is_expired(date))