serialutil: add tests for Timeout class
diff --git a/test/test_timeout_class.py b/test/test_timeout_class.py
new file mode 100644
index 0000000..37c38b1
--- /dev/null
+++ b/test/test_timeout_class.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+#
+# This file is part of pySerial - Cross platform serial port support for Python
+# (C) 2016 Chris Liechti <cliechti@gmx.net>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+"""
+Test Timeout helper class.
+"""
+import sys
+import unittest
+import time
+from serial import serialutil
+
+
+class TestTimeoutClass(unittest.TestCase):
+ """Test the Timeout class"""
+
+ def test_simple_timeout(self):
+ """Test simple timeout"""
+ t = serialutil.Timeout(2)
+ self.assertFalse(t.expired())
+ self.assertTrue(t.time_left() > 0)
+ time.sleep(2.1)
+ self.assertTrue(t.expired())
+ self.assertEqual(t.time_left(), 0)
+
+ def test_non_blocking(self):
+ """Test nonblocking case (0)"""
+ t = serialutil.Timeout(0)
+ self.assertTrue(t.is_non_blocking)
+ self.assertFalse(t.is_infinite)
+ self.assertTrue(t.expired())
+
+ def test_blocking(self):
+ """Test no timeout (None)"""
+ t = serialutil.Timeout(None)
+ self.assertFalse(t.is_non_blocking)
+ self.assertTrue(t.is_infinite)
+ #~ self.assertFalse(t.expired())
+
+ def test_changing_clock(self):
+ """Test recovery from chaning clock"""
+ class T(serialutil.Timeout):
+ def TIME(self):
+ return test_time
+ test_time = 1000
+ t = T(10)
+ self.assertEqual(t.target_time, 1010)
+ self.assertFalse(t.expired())
+ self.assertTrue(t.time_left() > 0)
+ test_time = 100 # clock jumps way back
+ self.assertTrue(t.time_left() > 0)
+ self.assertTrue(t.time_left() <= 10)
+ self.assertEqual(t.target_time, 110)
+ test_time = 10000 # jump way forward
+ self.assertEqual(t.time_left(), 0) # if will expire immediately
+
+
+if __name__ == '__main__':
+ sys.stdout.write(__doc__)
+ if len(sys.argv) > 1:
+ PORT = sys.argv[1]
+ sys.argv[1:] = ['-v']
+ # When this module is executed from the command-line, it runs all its tests
+ unittest.main()