1 files changed, 67 insertions, 0 deletions
diff --git a/test/test_rs485.py b/test/test_rs485.py
new file mode 100644
index 0000000..e918f67
--- /dev/null
+++ b/test/test_rs485.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+#
+# This file is part of pySerial - Cross platform serial port support for Python
+# (C) 2015 Chris Liechti <cliechti@gmx.net>
+#
+# SPDX-License-Identifier:    BSD-3-Clause
+"""\
+Test RS485 related functionality.
+"""
+
+import unittest
+import serial
+import serial.rs485
+
+# on which port should the tests be performed:
+PORT = 'loop://'
+
+
+class Test_RS485_settings(unittest.TestCase):
+    """Test RS485 related functionality"""
+
+    def setUp(self):
+        # create a closed serial port
+        self.s = serial.serial_for_url(PORT, do_not_open=True)
+
+    def tearDown(self):
+        self.s.close()
+
+    def test_enable_RS485(self):
+        # XXX open() port - but will result in fail for most HW...
+        #~ self.s.open()
+        self.assertEqual(self.s._rs485_mode, None, 'RS485 is disabled by default')
+        self.assertEqual(self.s.rs485_mode, None, 'RS485 is disabled by default')
+        self.s.rs485_mode = serial.rs485.RS485Settings()
+        self.assertTrue(self.s._rs485_mode is not None, 'RS485 is enabled')
+        self.assertTrue(self.s.rs485_mode is not None, 'RS485 is enabled')
+        self.s.rs485_mode = None
+        self.assertEqual(self.s._rs485_mode, None, 'RS485 is disabled again')
+        self.assertEqual(self.s.rs485_mode, None, 'RS485 is disabled again')
+
+
+class Test_RS485_class(unittest.TestCase):
+    """Test RS485 class"""
+
+    def setUp(self):
+        if not isinstance(serial.serial_for_url(PORT), serial.Serial):
+            raise unittest.SkipTest("RS485 test only compatible with real serial port")
+        self.s = serial.rs485.RS485(PORT, timeout=1)
+
+    def tearDown(self):
+        self.s.close()
+
+    def test_RS485_class(self):
+        self.s.rs485_mode = serial.rs485.RS485Settings()
+        self.s.write(b'hello')
+        self.assertEqual(self.s.read(5), b'hello')
+
+
+if __name__ == '__main__':
+    import sys
+    sys.stdout.write(__doc__)
+    if len(sys.argv) > 1:
+        PORT = sys.argv[1]
+    sys.stdout.write("Testing port: {!r}\n".format(PORT))
+    sys.argv[1:] = ['-v']
+    # When this module is executed from the command-line, it runs all its tests
+    unittest.main()