1 files changed, 61 insertions, 0 deletions
diff --git a/tests/datetime/test_replace.py b/tests/datetime/test_replace.py
new file mode 100644
index 0000000..694ef7b
--- /dev/null
+++ b/tests/datetime/test_replace.py
@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+import pendulum
+
+from tests.conftest import assert_datetime
+
+
+def test_replace_tzinfo_dst_off():
+    utc = pendulum.datetime(2016, 3, 27, 0, 30)  # 30 min before DST turning on
+    in_paris = utc.in_tz("Europe/Paris")
+
+    assert_datetime(in_paris, 2016, 3, 27, 1, 30, 0)
+
+    in_paris = in_paris.replace(second=1)
+
+    assert_datetime(in_paris, 2016, 3, 27, 1, 30, 1)
+    assert not in_paris.is_dst()
+    assert in_paris.offset == 3600
+    assert in_paris.timezone_name == "Europe/Paris"
+
+
+def test_replace_tzinfo_dst_transitioning_on():
+    utc = pendulum.datetime(2016, 3, 27, 1, 30)  # In middle of turning on
+    in_paris = utc.in_tz("Europe/Paris")
+
+    assert_datetime(in_paris, 2016, 3, 27, 3, 30, 0)
+
+    in_paris = in_paris.replace(second=1)
+
+    assert_datetime(in_paris, 2016, 3, 27, 3, 30, 1)
+    assert in_paris.is_dst()
+    assert in_paris.offset == 7200
+    assert in_paris.timezone_name == "Europe/Paris"
+
+
+def test_replace_tzinfo_dst_on():
+    utc = pendulum.datetime(2016, 10, 30, 0, 30)  # 30 min before DST turning off
+    in_paris = utc.in_tz("Europe/Paris")
+
+    assert_datetime(in_paris, 2016, 10, 30, 2, 30, 0)
+
+    in_paris = in_paris.replace(second=1)
+
+    assert_datetime(in_paris, 2016, 10, 30, 2, 30, 1)
+    assert in_paris.is_dst()
+    assert in_paris.offset == 7200
+    assert in_paris.timezone_name == "Europe/Paris"
+
+
+def test_replace_tzinfo_dst_transitioning_off():
+    utc = pendulum.datetime(2016, 10, 30, 1, 30)  # In the middle of turning off
+    in_paris = utc.in_tz("Europe/Paris")
+
+    assert_datetime(in_paris, 2016, 10, 30, 2, 30, 0)
+
+    in_paris = in_paris.replace(second=1)
+
+    assert_datetime(in_paris, 2016, 10, 30, 2, 30, 1)
+    assert not in_paris.is_dst()
+    assert in_paris.offset == 3600
+    assert in_paris.timezone_name == "Europe/Paris"