related to SF 3093882, raise an exception when open() is called twice, also add unit test for this

git-svn-id: http://svn.code.sf.net/p/pyserial/code/trunk/pyserial@392 f19166aa-fa4f-0410-85c2-fa1106f25c8a

1 files changed, 7 insertions, 0 deletions

diff --git a/test/test_advanced.py b/test/test_advanced.py
index 6c45006..0d85e2a 100644
--- a/test/test_advanced.py
+++ b/test/test_advanced.py
@@ -67,6 +67,13 @@ class Test_ChangeAttributes(unittest.TestCase):
             self.failUnlessEqual(self.s.port, 1)
             self.failUnlessEqual(self.s.portstr, serial.device(1))
 
+    def test_DoubleOpen(self):
+        self.s.port = PORT
+        self.s.open()
+        # calling open for a second time is an error
+        self.failUnlessRaises(serial.SerialException, self.s.open)
+
+
     def test_BaudrateSetting(self):
         self.s.port = PORT
         self.s.open()