Fixing unit tests

tests/test_connection_class.py

@@ -231,11 +231,9 @@ def test_read_string(self):
         # Assert that the server received the correct command
         self.assert_command_id(requests[0], constants.ADSCOMMAND_READ)
 
-        # The string buffer is 1024 bytes long, this will be filled with \x0F
-        # and null terminated with \x00 by our test server. The \x00 will get
-        # chopped off during parsing to python string type
-        expected_result = "\x0F" * 1023
-        self.assertEqual(result, expected_result)
+        # We are reading only a single character, which the test-server defaults at 0
+        expected_result = "\x00"
+        self.assertEqual(expected_result, result)
 
     def test_write_uint(self):
         value = 100