tmk_core/tool/mbed/mbed-sdk/workspace_tools/host_tests/dev_null_auto.py

   1 """
   2 mbed SDK
   3 Copyright (c) 2011-2013 ARM Limited
   4
   5 Licensed under the Apache License, Version 2.0 (the "License");
   6 you may not use this file except in compliance with the License.
   7 You may obtain a copy of the License at
   8
   9     http://www.apache.org/licenses/LICENSE-2.0
  10
  11 Unless required by applicable law or agreed to in writing, software
  12 distributed under the License is distributed on an "AS IS" BASIS,
  13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 See the License for the specific language governing permissions and
  15 limitations under the License.
  16 """
  17
  18 class DevNullTest():
  19
  20     def check_readline(self, selftest, text):
  21         """ Reads line from serial port and checks if text was part of read string
  22         """
  23         result = False
  24         c = selftest.mbed.serial_readline()
  25         if c and text in c:
  26             result = True
  27         return result
  28
  29     def test(self, selftest):
  30         result = True
  31         # Test should print some text and later stop printing
  32         # 'MBED: re-routing stdout to /null'
  33         res = self.check_readline(selftest, "re-routing stdout to /null")
  34         if not res:
  35             # We haven't read preamble line
  36             result = False
  37         else:
  38             # Check if there are printed characters
  39             str = ''
  40             for i in range(3):
  41                 c = selftest.mbed.serial_read(32)
  42                 if c is None:
  43                     return selftest.RESULT_IO_SERIAL
  44                 else:
  45                     str += c
  46                 if len(str) > 0:
  47                     result = False
  48                     break
  49             selftest.notify("Received %d bytes: %s"% (len(str), str))
  50         return selftest.RESULT_SUCCESS if result else selftest.RESULT_FAILURE