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- """
- mbed SDK
- Copyright (c) 2011-2013 ARM Limited
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
- """
-
- class DevNullTest():
-
- def check_readline(self, selftest, text):
- """ Reads line from serial port and checks if text was part of read string
- """
- result = False
- c = selftest.mbed.serial_readline()
- if c and text in c:
- result = True
- return result
-
- def test(self, selftest):
- result = True
- # Test should print some text and later stop printing
- # 'MBED: re-routing stdout to /null'
- res = self.check_readline(selftest, "re-routing stdout to /null")
- if not res:
- # We haven't read preamble line
- result = False
- else:
- # Check if there are printed characters
- str = ''
- for i in range(3):
- c = selftest.mbed.serial_read(32)
- if c is None:
- return selftest.RESULT_IO_SERIAL
- else:
- str += c
- if len(str) > 0:
- result = False
- break
- selftest.notify("Received %d bytes: %s"% (len(str), str))
- return selftest.RESULT_SUCCESS if result else selftest.RESULT_FAILURE
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