1 files changed, 28 insertions, 0 deletions

diff --git a/glucometerutils/drivers/tests/test_td42xx.py b/glucometerutils/drivers/tests/test_td42xx.py
new file mode 100644
index 0000000..556d296
--- /dev/null
+++ b/glucometerutils/drivers/tests/test_td42xx.py
@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+#
+# SPDX-FileCopyrightText: © 2019 The glucometerutils Authors
+# SPDX-License-Identifier: MIT
+"""Tests for the TD-42xx driver."""
+
+# pylint: disable=protected-access,missing-docstring
+
+import datetime
+
+from absl.testing import parameterized
+
+from glucometerutils.drivers import td42xx
+
+
+class TestTD4277Nexus(parameterized.TestCase):
+    @parameterized.parameters(
+        (b"\x21\x24\x0e\x15", datetime.datetime(2018, 1, 1, 21, 14)),
+        (b"\x21\x26\x0e\x15", datetime.datetime(2019, 1, 1, 21, 14)),
+        (b"\x04\x27\x25\x0d", datetime.datetime(2019, 8, 4, 13, 37)),
+    )
+    def test_parse_datetime(self, message, date):
+        self.assertEqual(td42xx._parse_datetime(message), date)
+
+    def test_making_message(self):
+        self.assertEqual(
+            td42xx._make_packet(0x22, 0), b"\x51\x22\x00\x00\x00\x00\xa3\x16"
+        )