Fix overflow in unpacking timestamp to datetime (#452)

1 files changed, 11 insertions, 0 deletions

diff --git a/test/test_timestamp.py b/test/test_timestamp.py
index edc488a..6a29be7 100644
--- a/test/test_timestamp.py
+++ b/test/test_timestamp.py
@@ -129,3 +129,14 @@ def test_pack_datetime():
     assert x
     assert x[0] == dt
     assert msgpack.unpackb(packed) is None
+
+
+@pytest.mark.skipif(sys.version_info[0] == 2, reason="datetime support is PY3+ only")
+def test_issue451():
+    # https://github.com/msgpack/msgpack-python/issues/451
+    dt = datetime.datetime(2100, 1, 1, 1, 1, tzinfo=_utc)
+    packed = msgpack.packb(dt, datetime=True)
+    assert packed == b"\xd6\xff\xf4\x86eL"
+
+    unpacked = msgpack.unpackb(packed, timestamp=3)
+    assert dt == unpacked