788 lines
27 KiB
Python
788 lines
27 KiB
Python
# Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http:#www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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DUT provides 3 major groups of features:
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* DUT port feature, provide basic open/close/read/write features
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* DUT tools, provide extra methods to control the device, like download and start app
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* DUT expect method, provide features for users to check DUT outputs
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The current design of DUT have 3 classes for one DUT: BaseDUT, DUTPort, DUTTool.
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* BaseDUT class:
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* defines methods DUT port and DUT tool need to overwrite
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* provide the expect methods and some other methods based on DUTPort
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* DUTPort class:
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* inherent from BaseDUT class
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* implements the port features by overwriting port methods defined in BaseDUT
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* DUTTool class:
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* inherent from one of the DUTPort class
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* implements the tools features by overwriting tool methods defined in BaseDUT
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* could add some new methods provided by the tool
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This module implements the BaseDUT class and one of the port class SerialDUT.
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User should implement their DUTTool classes.
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If they using different port then need to implement their DUTPort class as well.
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"""
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from __future__ import print_function
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import time
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import re
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import threading
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import copy
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import functools
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# python2 and python3 queue package name is different
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try:
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import Queue as _queue
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except ImportError:
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import queue as _queue
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import serial
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from serial.tools import list_ports
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import Utility
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class ExpectTimeout(ValueError):
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""" timeout for expect method """
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pass
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class UnsupportedExpectItem(ValueError):
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""" expect item not supported by the expect method """
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pass
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def _expect_lock(func):
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@functools.wraps(func)
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def handler(self, *args, **kwargs):
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with self.expect_lock:
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ret = func(self, *args, **kwargs)
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return ret
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return handler
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def _decode_data(data):
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""" for python3, if the data is bytes, then decode it to string """
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if isinstance(data, bytes):
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# convert bytes to string
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try:
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data = data.decode("utf-8", "ignore")
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except UnicodeDecodeError:
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data = data.decode("iso8859-1", )
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return data
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def _pattern_to_string(pattern):
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try:
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ret = "RegEx: " + pattern.pattern
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except AttributeError:
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ret = pattern
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return ret
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class _DataCache(_queue.Queue):
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"""
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Data cache based on Queue. Allow users to process data cache based on bytes instead of Queue."
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"""
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def __init__(self, maxsize=0):
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_queue.Queue.__init__(self, maxsize=maxsize)
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self.data_cache = str()
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def _move_from_queue_to_cache(self):
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"""
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move all of the available data in the queue to cache
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:return: True if moved any item from queue to data cache, else False
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"""
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ret = False
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while True:
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try:
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self.data_cache += _decode_data(self.get(0))
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ret = True
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except _queue.Empty:
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break
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return ret
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def get_data(self, timeout=0.0):
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"""
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get a copy of data from cache.
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:param timeout: timeout for waiting new queue item
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:return: copy of data cache
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"""
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# make sure timeout is non-negative
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if timeout < 0:
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timeout = 0
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ret = self._move_from_queue_to_cache()
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if not ret:
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# we only wait for new data if we can't provide a new data_cache
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try:
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data = self.get(timeout=timeout)
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self.data_cache += _decode_data(data)
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except _queue.Empty:
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# don't do anything when on update for cache
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pass
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return copy.deepcopy(self.data_cache)
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def flush(self, index=0xFFFFFFFF):
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"""
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flush data from cache.
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:param index: if < 0 then don't do flush, otherwise flush data before index
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:return: None
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"""
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# first add data in queue to cache
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self.get_data()
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if index > 0:
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self.data_cache = self.data_cache[index:]
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class _LogThread(threading.Thread, _queue.Queue):
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"""
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We found some SD card on Raspberry Pi could have very bad performance.
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It could take seconds to save small amount of data.
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If the DUT receives data and save it as log, then it stops receiving data until log is saved.
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This could lead to expect timeout.
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As an workaround to this issue, ``BaseDUT`` class will create a thread to save logs.
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Then data will be passed to ``expect`` as soon as received.
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"""
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def __init__(self):
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threading.Thread.__init__(self, name="LogThread")
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_queue.Queue.__init__(self, maxsize=0)
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self.setDaemon(True)
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self.flush_lock = threading.Lock()
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def save_log(self, filename, data):
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"""
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:param filename: log file name
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:param data: log data. Must be ``bytes``.
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"""
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self.put({"filename": filename, "data": data})
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def flush_data(self):
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with self.flush_lock:
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data_cache = dict()
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while True:
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# move all data from queue to data cache
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try:
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log = self.get_nowait()
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try:
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data_cache[log["filename"]] += log["data"]
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except KeyError:
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data_cache[log["filename"]] = log["data"]
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except _queue.Empty:
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break
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# flush data
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for filename in data_cache:
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with open(filename, "ab+") as f:
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f.write(data_cache[filename])
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def run(self):
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while True:
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time.sleep(1)
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self.flush_data()
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class RecvThread(threading.Thread):
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CHECK_FUNCTIONS = []
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""" DUT subclass can define a few check functions to process received data. """
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def __init__(self, read, dut):
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super(RecvThread, self).__init__()
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self.exit_event = threading.Event()
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self.setDaemon(True)
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self.read = read
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self.dut = dut
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self.data_cache = dut.data_cache
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self.recorded_data = dut.recorded_data
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self.record_data_lock = dut.record_data_lock
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self._line_cache = str()
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def _line_completion(self, data):
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"""
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Usually check functions requires to check for one complete line.
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This method will do line completion for the first line, and strip incomplete last line.
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"""
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ret = self._line_cache
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decoded_data = _decode_data(data)
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# cache incomplete line to later process
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lines = decoded_data.splitlines(True)
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last_line = lines[-1]
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if last_line[-1] != "\n":
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if len(lines) == 1:
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# only one line and the line is not finished, then append this to cache
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self._line_cache += lines[-1]
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ret = str()
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else:
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# more than one line and not finished, replace line cache
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self._line_cache = lines[-1]
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ret += "".join(lines[:-1])
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else:
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# line finishes, flush cache
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self._line_cache = str()
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ret += decoded_data
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return ret
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def run(self):
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while not self.exit_event.isSet():
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raw_data = self.read(1000)
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if raw_data:
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with self.record_data_lock:
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self.data_cache.put(raw_data)
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for capture_id in self.recorded_data:
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self.recorded_data[capture_id].put(raw_data)
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# we need to do line completion before call check functions
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comp_data = self._line_completion(raw_data)
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for check_function in self.CHECK_FUNCTIONS:
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check_function(self, comp_data)
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def exit(self):
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self.exit_event.set()
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self.join()
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class BaseDUT(object):
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"""
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:param name: application defined name for port
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:param port: comport name, used to create DUT port
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:param log_file: log file name
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:param app: test app instance
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:param kwargs: extra args for DUT to create ports
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"""
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DEFAULT_EXPECT_TIMEOUT = 10
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MAX_EXPECT_FAILURES_TO_SAVED = 10
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RECV_THREAD_CLS = RecvThread
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""" DUT subclass can specify RECV_THREAD_CLS to do add some extra stuff when receive data.
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For example, DUT can implement exception detect & analysis logic in receive thread subclass. """
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LOG_THREAD = _LogThread()
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LOG_THREAD.start()
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def __init__(self, name, port, log_file, app, **kwargs):
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self.expect_lock = threading.Lock()
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self.name = name
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self.port = port
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self.log_file = log_file
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self.app = app
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self.data_cache = _DataCache()
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# the main process of recorded data are done in receive thread
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# but receive thread could be closed in DUT lifetime (tool methods)
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# so we keep it in BaseDUT, as their life cycle are same
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self.recorded_data = dict()
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self.record_data_lock = threading.RLock()
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self.receive_thread = None
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self.expect_failures = []
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self._port_open()
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self.start_receive()
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def __str__(self):
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return "DUT({}: {})".format(self.name, str(self.port))
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def _save_expect_failure(self, pattern, data, start_time):
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"""
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Save expect failure. If the test fails, then it will print the expect failures.
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In some cases, user will handle expect exceptions.
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The expect failures could be false alarm, and test case might generate a lot of such failures.
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Therefore, we don't print the failure immediately and limit the max size of failure list.
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"""
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self.expect_failures.insert(0, {"pattern": pattern, "data": data,
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"start": start_time, "end": time.time()})
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self.expect_failures = self.expect_failures[:self.MAX_EXPECT_FAILURES_TO_SAVED]
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def _save_dut_log(self, data):
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"""
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Save DUT log into file using another thread.
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This is a workaround for some devices takes long time for file system operations.
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See descriptions in ``_LogThread`` for details.
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"""
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self.LOG_THREAD.save_log(self.log_file, data)
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# define for methods need to be overwritten by Port
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@classmethod
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def list_available_ports(cls):
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"""
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list all available ports.
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subclass (port) must overwrite this method.
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:return: list of available comports
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"""
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pass
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def _port_open(self):
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"""
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open the port.
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subclass (port) must overwrite this method.
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:return: None
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"""
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pass
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def _port_read(self, size=1):
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"""
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read form port. This method should not blocking for long time, otherwise receive thread can not exit.
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subclass (port) must overwrite this method.
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:param size: max size to read.
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:return: read data.
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"""
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pass
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def _port_write(self, data):
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"""
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write to port.
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subclass (port) must overwrite this method.
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:param data: data to write
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:return: None
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"""
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pass
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def _port_close(self):
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"""
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close port.
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subclass (port) must overwrite this method.
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:return: None
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"""
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pass
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# methods that need to be overwritten by Tool
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@classmethod
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def confirm_dut(cls, port, app, **kwargs):
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"""
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confirm if it's a DUT, usually used by auto detecting DUT in by Env config.
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subclass (tool) must overwrite this method.
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:param port: comport
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:param app: app instance
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:return: True or False
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"""
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pass
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def start_app(self):
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"""
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usually after we got DUT, we need to do some extra works to let App start.
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For example, we need to reset->download->reset to let IDF application start on DUT.
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subclass (tool) must overwrite this method.
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:return: None
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"""
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pass
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# methods that features raw port methods
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def start_receive(self):
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"""
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Start thread to receive data.
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:return: None
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"""
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self.receive_thread = self.RECV_THREAD_CLS(self._port_read, self)
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self.receive_thread.start()
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def stop_receive(self):
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"""
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stop the receiving thread for the port
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:return: None
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"""
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if self.receive_thread:
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self.receive_thread.exit()
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self.LOG_THREAD.flush_data()
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self.receive_thread = None
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def close(self):
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"""
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permanently close the port
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"""
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self.stop_receive()
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self._port_close()
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@staticmethod
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def u_to_bytearray(data):
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"""
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if data is not bytearray then it tries to convert it
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:param data: data which needs to be checked and maybe transformed
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"""
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if isinstance(data, type(u'')):
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try:
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data = data.encode('utf-8')
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except Exception as e:
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print(u'Cannot encode {} of type {}'.format(data, type(data)))
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raise e
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return data
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def write(self, data, eol="\r\n", flush=True):
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"""
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:param data: data
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:param eol: end of line pattern.
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:param flush: if need to flush received data cache before write data.
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usually we need to flush data before write,
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make sure processing outputs generated by wrote.
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:return: None
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"""
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# do flush before write
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if flush:
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self.data_cache.flush()
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# do write if cache
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if data is not None:
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self._port_write(self.u_to_bytearray(data) + self.u_to_bytearray(eol) if eol else self.u_to_bytearray(data))
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@_expect_lock
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def read(self, size=0xFFFFFFFF):
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"""
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read(size=0xFFFFFFFF)
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read raw data. NOT suggested to use this method.
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Only use it if expect method doesn't meet your requirement.
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:param size: read size. default read all data
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:return: read data
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"""
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data = self.data_cache.get_data(0)[:size]
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self.data_cache.flush(size)
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return data
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def start_capture_raw_data(self, capture_id="default"):
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"""
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Sometime application want to get DUT raw data and use ``expect`` method at the same time.
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Capture methods provides a way to get raw data without affecting ``expect`` or ``read`` method.
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If you call ``start_capture_raw_data`` with same capture id again, it will restart capture on this ID.
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:param capture_id: ID of capture. You can use different IDs to do different captures at the same time.
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"""
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with self.record_data_lock:
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try:
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# if start capture on existed ID, we do flush data and restart capture
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self.recorded_data[capture_id].flush()
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except KeyError:
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# otherwise, create new data cache
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self.recorded_data[capture_id] = _DataCache()
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def stop_capture_raw_data(self, capture_id="default"):
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"""
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Stop capture and get raw data.
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This method should be used after ``start_capture_raw_data`` on the same capture ID.
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:param capture_id: ID of capture.
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:return: captured raw data between start capture and stop capture.
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"""
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with self.record_data_lock:
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try:
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ret = self.recorded_data[capture_id].get_data()
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self.recorded_data.pop(capture_id)
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except KeyError as e:
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e.message = "capture_id does not exist. " \
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"You should call start_capture_raw_data with same ID " \
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"before calling stop_capture_raw_data"
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raise e
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return ret
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|
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# expect related methods
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@staticmethod
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def _expect_str(data, pattern):
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"""
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protected method. check if string is matched in data cache.
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:param data: data to process
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:param pattern: string
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:return: pattern if match succeed otherwise None
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"""
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index = data.find(pattern)
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if index != -1:
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ret = pattern
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index += len(pattern)
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else:
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ret = None
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return ret, index
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|
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@staticmethod
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def _expect_re(data, pattern):
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"""
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protected method. check if re pattern is matched in data cache
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:param data: data to process
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:param pattern: compiled RegEx pattern
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:return: match groups if match succeed otherwise None
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"""
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ret = None
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if isinstance(pattern.pattern, type(u'')):
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pattern = re.compile(BaseDUT.u_to_bytearray(pattern.pattern))
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if isinstance(data, type(u'')):
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data = BaseDUT.u_to_bytearray(data)
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match = pattern.search(data)
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if match:
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ret = tuple(None if x is None else x.decode() for x in match.groups())
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index = match.end()
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else:
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index = -1
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return ret, index
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|
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EXPECT_METHOD = [
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[type(re.compile("")), "_expect_re"],
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[type(b''), "_expect_str"], # Python 2 & 3 hook to work without 'from builtins import str' from future
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[type(u''), "_expect_str"],
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]
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def _get_expect_method(self, pattern):
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"""
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protected method. get expect method according to pattern type.
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:param pattern: expect pattern, string or compiled RegEx
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:return: ``_expect_str`` or ``_expect_re``
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|
"""
|
|
for expect_method in self.EXPECT_METHOD:
|
|
if isinstance(pattern, expect_method[0]):
|
|
method = expect_method[1]
|
|
break
|
|
else:
|
|
raise UnsupportedExpectItem()
|
|
return self.__getattribute__(method)
|
|
|
|
@_expect_lock
|
|
def expect(self, pattern, timeout=DEFAULT_EXPECT_TIMEOUT):
|
|
"""
|
|
expect(pattern, timeout=DEFAULT_EXPECT_TIMEOUT)
|
|
expect received data on DUT match the pattern. will raise exception when expect timeout.
|
|
|
|
:raise ExpectTimeout: failed to find the pattern before timeout
|
|
:raise UnsupportedExpectItem: pattern is not string or compiled RegEx
|
|
|
|
:param pattern: string or compiled RegEx(string pattern)
|
|
:param timeout: timeout for expect
|
|
:return: string if pattern is string; matched groups if pattern is RegEx
|
|
"""
|
|
method = self._get_expect_method(pattern)
|
|
|
|
# non-blocking get data for first time
|
|
data = self.data_cache.get_data(0)
|
|
start_time = time.time()
|
|
while True:
|
|
ret, index = method(data, pattern)
|
|
if ret is not None:
|
|
self.data_cache.flush(index)
|
|
break
|
|
time_remaining = start_time + timeout - time.time()
|
|
if time_remaining < 0:
|
|
break
|
|
# wait for new data from cache
|
|
data = self.data_cache.get_data(time_remaining)
|
|
|
|
if ret is None:
|
|
pattern = _pattern_to_string(pattern)
|
|
self._save_expect_failure(pattern, data, start_time)
|
|
raise ExpectTimeout(self.name + ": " + pattern)
|
|
return ret
|
|
|
|
def _expect_multi(self, expect_all, expect_item_list, timeout):
|
|
"""
|
|
protected method. internal logical for expect multi.
|
|
|
|
:param expect_all: True or False, expect all items in the list or any in the list
|
|
:param expect_item_list: expect item list
|
|
:param timeout: timeout
|
|
:return: None
|
|
"""
|
|
def process_expected_item(item_raw):
|
|
# convert item raw data to standard dict
|
|
item = {
|
|
"pattern": item_raw[0] if isinstance(item_raw, tuple) else item_raw,
|
|
"method": self._get_expect_method(item_raw[0] if isinstance(item_raw, tuple)
|
|
else item_raw),
|
|
"callback": item_raw[1] if isinstance(item_raw, tuple) else None,
|
|
"index": -1,
|
|
"ret": None,
|
|
}
|
|
return item
|
|
|
|
expect_items = [process_expected_item(x) for x in expect_item_list]
|
|
|
|
# non-blocking get data for first time
|
|
data = self.data_cache.get_data(0)
|
|
|
|
start_time = time.time()
|
|
matched_expect_items = list()
|
|
while True:
|
|
for expect_item in expect_items:
|
|
if expect_item not in matched_expect_items:
|
|
# exclude those already matched
|
|
expect_item["ret"], expect_item["index"] = \
|
|
expect_item["method"](data, expect_item["pattern"])
|
|
if expect_item["ret"] is not None:
|
|
# match succeed for one item
|
|
matched_expect_items.append(expect_item)
|
|
|
|
# if expect all, then all items need to be matched,
|
|
# else only one item need to matched
|
|
if expect_all:
|
|
match_succeed = len(matched_expect_items) == len(expect_items)
|
|
else:
|
|
match_succeed = True if matched_expect_items else False
|
|
|
|
time_remaining = start_time + timeout - time.time()
|
|
if time_remaining < 0 or match_succeed:
|
|
break
|
|
else:
|
|
data = self.data_cache.get_data(time_remaining)
|
|
|
|
if match_succeed:
|
|
# sort matched items according to order of appearance in the input data,
|
|
# so that the callbacks are invoked in correct order
|
|
matched_expect_items = sorted(matched_expect_items, key=lambda it: it["index"])
|
|
# invoke callbacks and flush matched data cache
|
|
slice_index = -1
|
|
for expect_item in matched_expect_items:
|
|
# trigger callback
|
|
if expect_item["callback"]:
|
|
expect_item["callback"](expect_item["ret"])
|
|
slice_index = max(slice_index, expect_item["index"])
|
|
# flush already matched data
|
|
self.data_cache.flush(slice_index)
|
|
else:
|
|
pattern = str([_pattern_to_string(x["pattern"]) for x in expect_items])
|
|
self._save_expect_failure(pattern, data, start_time)
|
|
raise ExpectTimeout(self.name + ": " + pattern)
|
|
|
|
@_expect_lock
|
|
def expect_any(self, *expect_items, **timeout):
|
|
"""
|
|
expect_any(*expect_items, timeout=DEFAULT_TIMEOUT)
|
|
expect any of the patterns.
|
|
will call callback (if provided) if pattern match succeed and then return.
|
|
will pass match result to the callback.
|
|
|
|
:raise ExpectTimeout: failed to match any one of the expect items before timeout
|
|
:raise UnsupportedExpectItem: pattern in expect_item is not string or compiled RegEx
|
|
|
|
:arg expect_items: one or more expect items.
|
|
string, compiled RegEx pattern or (string or RegEx(string pattern), callback)
|
|
:keyword timeout: timeout for expect
|
|
:return: None
|
|
"""
|
|
# to be compatible with python2
|
|
# in python3 we can write f(self, *expect_items, timeout=DEFAULT_TIMEOUT)
|
|
if "timeout" not in timeout:
|
|
timeout["timeout"] = self.DEFAULT_EXPECT_TIMEOUT
|
|
return self._expect_multi(False, expect_items, **timeout)
|
|
|
|
@_expect_lock
|
|
def expect_all(self, *expect_items, **timeout):
|
|
"""
|
|
expect_all(*expect_items, timeout=DEFAULT_TIMEOUT)
|
|
expect all of the patterns.
|
|
will call callback (if provided) if all pattern match succeed and then return.
|
|
will pass match result to the callback.
|
|
|
|
:raise ExpectTimeout: failed to match all of the expect items before timeout
|
|
:raise UnsupportedExpectItem: pattern in expect_item is not string or compiled RegEx
|
|
|
|
:arg expect_items: one or more expect items.
|
|
string, compiled RegEx pattern or (string or RegEx(string pattern), callback)
|
|
:keyword timeout: timeout for expect
|
|
:return: None
|
|
"""
|
|
# to be compatible with python2
|
|
# in python3 we can write f(self, *expect_items, timeout=DEFAULT_TIMEOUT)
|
|
if "timeout" not in timeout:
|
|
timeout["timeout"] = self.DEFAULT_EXPECT_TIMEOUT
|
|
return self._expect_multi(True, expect_items, **timeout)
|
|
|
|
@staticmethod
|
|
def _format_ts(ts):
|
|
return "{}:{}".format(time.strftime("%m-%d %H:%M:%S", time.localtime(ts)), str(ts % 1)[2:5])
|
|
|
|
def print_debug_info(self):
|
|
"""
|
|
Print debug info of current DUT. Currently we will print debug info for expect failures.
|
|
"""
|
|
Utility.console_log("DUT debug info for DUT: {}:".format(self.name), color="orange")
|
|
|
|
for failure in self.expect_failures:
|
|
Utility.console_log(u"\t[pattern]: {}\r\n\t[data]: {}\r\n\t[time]: {} - {}\r\n"
|
|
.format(failure["pattern"], failure["data"],
|
|
self._format_ts(failure["start"]), self._format_ts(failure["end"])),
|
|
color="orange")
|
|
|
|
|
|
class SerialDUT(BaseDUT):
|
|
""" serial with logging received data feature """
|
|
|
|
DEFAULT_UART_CONFIG = {
|
|
"baudrate": 115200,
|
|
"bytesize": serial.EIGHTBITS,
|
|
"parity": serial.PARITY_NONE,
|
|
"stopbits": serial.STOPBITS_ONE,
|
|
"timeout": 0.05,
|
|
"xonxoff": False,
|
|
"rtscts": False,
|
|
}
|
|
|
|
def __init__(self, name, port, log_file, app, **kwargs):
|
|
self.port_inst = None
|
|
self.serial_configs = self.DEFAULT_UART_CONFIG.copy()
|
|
self.serial_configs.update(kwargs)
|
|
super(SerialDUT, self).__init__(name, port, log_file, app, **kwargs)
|
|
|
|
def _format_data(self, data):
|
|
"""
|
|
format data for logging. do decode and add timestamp.
|
|
|
|
:param data: raw data from read
|
|
:return: formatted data (str)
|
|
"""
|
|
timestamp = "[{}]".format(self._format_ts(time.time()))
|
|
formatted_data = timestamp.encode() + b"\r\n" + data + b"\r\n"
|
|
return formatted_data
|
|
|
|
def _port_open(self):
|
|
self.port_inst = serial.Serial(self.port, **self.serial_configs)
|
|
|
|
def _port_close(self):
|
|
self.port_inst.close()
|
|
|
|
def _port_read(self, size=1):
|
|
data = self.port_inst.read(size)
|
|
if data:
|
|
self._save_dut_log(self._format_data(data))
|
|
return data
|
|
|
|
def _port_write(self, data):
|
|
if isinstance(data, str):
|
|
data = data.encode()
|
|
self.port_inst.write(data)
|
|
|
|
@classmethod
|
|
def list_available_ports(cls):
|
|
return [x.device for x in list_ports.comports()]
|