1 files changed, 112 insertions, 0 deletions
diff --git a/tests/time/test_sub.py b/tests/time/test_sub.py
new file mode 100644
index 0000000..1a957ad
--- /dev/null
+++ b/tests/time/test_sub.py
@@ -0,0 +1,112 @@
+from __future__ import annotations
+
+from datetime import time
+from datetime import timedelta
+
+import pytest
+import pytz
+
+import pendulum
+
+from pendulum import Time
+from tests.conftest import assert_duration
+
+
+def test_sub_hours_positive():
+    assert Time(0, 0, 0).subtract(hours=1).hour == 23
+
+
+def test_sub_hours_zero():
+    assert Time(0, 0, 0).subtract(hours=0).hour == 0
+
+
+def test_sub_hours_negative():
+    assert Time(0, 0, 0).subtract(hours=-1).hour == 1
+
+
+def test_sub_minutes_positive():
+    assert Time(0, 0, 0).subtract(minutes=1).minute == 59
+
+
+def test_sub_minutes_zero():
+    assert Time(0, 0, 0).subtract(minutes=0).minute == 0
+
+
+def test_sub_minutes_negative():
+    assert Time(0, 0, 0).subtract(minutes=-1).minute == 1
+
+
+def test_sub_seconds_positive():
+    assert Time(0, 0, 0).subtract(seconds=1).second == 59
+
+
+def test_sub_seconds_zero():
+    assert Time(0, 0, 0).subtract(seconds=0).second == 0
+
+
+def test_sub_seconds_negative():
+    assert Time(0, 0, 0).subtract(seconds=-1).second == 1
+
+
+def test_subtract_timedelta():
+    delta = timedelta(seconds=16, microseconds=654321)
+    d = Time(3, 12, 15, 777777)
+
+    d = d.subtract_timedelta(delta)
+    assert d.minute == 11
+    assert d.second == 59
+    assert d.microsecond == 123456
+
+    d = Time(3, 12, 15, 777777)
+
+    d = d - delta
+    assert d.minute == 11
+    assert d.second == 59
+    assert d.microsecond == 123456
+
+
+def test_add_timedelta_with_days():
+    delta = timedelta(days=3, seconds=45, microseconds=123456)
+    d = Time(3, 12, 15, 654321)
+
+    with pytest.raises(TypeError):
+        d.subtract_timedelta(delta)
+
+
+def test_subtract_invalid_type():
+    d = Time(0, 0, 0)
+
+    with pytest.raises(TypeError):
+        d - "ab"
+
+    with pytest.raises(TypeError):
+        "ab" - d
+
+
+def test_subtract_time():
+    t = Time(12, 34, 56)
+    t1 = Time(1, 1, 1)
+    t2 = time(1, 1, 1)
+    t3 = time(1, 1, 1, tzinfo=pytz.timezone("Europe/Paris"))
+
+    diff = t - t1
+    assert isinstance(diff, pendulum.Duration)
+    assert_duration(diff, 0, hours=11, minutes=33, seconds=55)
+
+    diff = t1 - t
+    assert isinstance(diff, pendulum.Duration)
+    assert_duration(diff, 0, hours=-11, minutes=-33, seconds=-55)
+
+    diff = t - t2
+    assert isinstance(diff, pendulum.Duration)
+    assert_duration(diff, 0, hours=11, minutes=33, seconds=55)
+
+    diff = t2 - t
+    assert isinstance(diff, pendulum.Duration)
+    assert_duration(diff, 0, hours=-11, minutes=-33, seconds=-55)
+
+    with pytest.raises(TypeError):
+        t - t3
+
+    with pytest.raises(TypeError):
+        t3 - t