1 files changed, 78 insertions, 0 deletions
diff --git a/tests/time/test_add.py b/tests/time/test_add.py
new file mode 100644
index 0000000..7075ebe
--- /dev/null
+++ b/tests/time/test_add.py
@@ -0,0 +1,78 @@
+from __future__ import annotations
+
+from datetime import timedelta
+
+import pytest
+
+import pendulum
+
+
+def test_add_hours_positive():
+    assert pendulum.time(12, 34, 56).add(hours=1).hour == 13
+
+
+def test_add_hours_zero():
+    assert pendulum.time(12, 34, 56).add(hours=0).hour == 12
+
+
+def test_add_hours_negative():
+    assert pendulum.time(12, 34, 56).add(hours=-1).hour == 11
+
+
+def test_add_minutes_positive():
+    assert pendulum.time(12, 34, 56).add(minutes=1).minute == 35
+
+
+def test_add_minutes_zero():
+    assert pendulum.time(12, 34, 56).add(minutes=0).minute == 34
+
+
+def test_add_minutes_negative():
+    assert pendulum.time(12, 34, 56).add(minutes=-1).minute == 33
+
+
+def test_add_seconds_positive():
+    assert pendulum.time(12, 34, 56).add(seconds=1).second == 57
+
+
+def test_add_seconds_zero():
+    assert pendulum.time(12, 34, 56).add(seconds=0).second == 56
+
+
+def test_add_seconds_negative():
+    assert pendulum.time(12, 34, 56).add(seconds=-1).second == 55
+
+
+def test_add_timedelta():
+    delta = timedelta(seconds=45, microseconds=123456)
+    d = pendulum.time(3, 12, 15, 654321)
+
+    d = d.add_timedelta(delta)
+    assert d.minute == 13
+    assert d.second == 0
+    assert d.microsecond == 777777
+
+    d = pendulum.time(3, 12, 15, 654321)
+
+    d = d + delta
+    assert d.minute == 13
+    assert d.second == 0
+    assert d.microsecond == 777777
+
+
+def test_add_timedelta_with_days():
+    delta = timedelta(days=3, seconds=45, microseconds=123456)
+    d = pendulum.time(3, 12, 15, 654321)
+
+    with pytest.raises(TypeError):
+        d.add_timedelta(delta)
+
+
+def test_addition_invalid_type():
+    d = pendulum.time(3, 12, 15, 654321)
+
+    with pytest.raises(TypeError):
+        d + 3
+
+    with pytest.raises(TypeError):
+        3 + d