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How to use _match_string method in lisa

Best Python code snippet using lisa_python

expectations_parser.py

Source:expectations_parser.py

1# Copyright 2017 The Chromium Authors. All rights reserved.2# Use of this source code is governed by a BSD-style license that can be3# found in the LICENSE file.4import re5class ParseError(Exception):6  pass7class Expectation(object):8  def __init__(self, reason, test, conditions, results):9    """Constructor for expectations.10    Args:11      reason: String that indicates the reason for disabling.12      test: String indicating which test is being disabled.13      conditions: List of tags indicating which conditions to disable for.14          Conditions are combined using logical and. Example: ['Mac', 'Debug']15      results: List of outcomes for test. Example: ['Skip', 'Pass']16    """17    assert isinstance(reason, basestring) or reason is None18    self._reason = reason19    assert isinstance(test, basestring)20    self._test = test21    assert isinstance(conditions, list)22    self._conditions = conditions23    assert isinstance(results, list)24    self._results = results25  def __eq__(self, other):26    return (self.reason == other.reason and27            self.test == other.test and28            self.conditions == other.conditions and29            self.results == other.results)30  @property31  def reason(self):32    return self._reason33  @property34  def test(self):35    return self._test36  @property37  def conditions(self):38    return self._conditions39  @property40  def results(self):41    return self._results42class TestExpectationParser(object):43  """Parse expectations data in TA/DA format.44  This parser covers the 'tagged' test lists format in:45      bit.ly/chromium-test-list-format46  Takes raw expectations data as a string read from the TA/DA expectation file47  in the format:48    # This is an example expectation file.49    #50    # tags: Mac Mac10.10 Mac10.1151    # tags: Win Win852    crbug.com/123 [ Win ] benchmark/story [ Skip ]53    ...54  """55  TAG_TOKEN = '# tags:'56  _MATCH_STRING = r'^(?:(crbug.com/\d+) )?'  # The bug field (optional).57  _MATCH_STRING += r'(?:\[ (.+) \] )?' # The label field (optional).58  _MATCH_STRING += r'(\S+) ' # The test path field.59  _MATCH_STRING += r'\[ ([^\[.]+) \]'  # The expectation field.60  _MATCH_STRING += r'(\s+#.*)?$' # End comment (optional).61  MATCHER = re.compile(_MATCH_STRING)62  def __init__(self, raw_data):63    self._tags = []64    self._expectations = []65    self._ParseRawExpectationData(raw_data)66  def _ParseRawExpectationData(self, raw_data):67    for count, line in list(enumerate(raw_data.splitlines(), start=1)):68      # Handle metadata and comments.69      if line.startswith(self.TAG_TOKEN):70        for word in line[len(self.TAG_TOKEN):].split():71          # Expectations must be after all tags are declared.72          if self._expectations:73            raise ParseError('Tag found after first expectation.')74          self._tags.append(word)75      elif line.startswith('#') or not line:76        continue  # Ignore, it is just a comment or empty.77      else:78        self._expectations.append(79            self._ParseExpectationLine(count, line, self._tags))80  def _ParseExpectationLine(self, line_number, line, tags):81    match = self.MATCHER.match(line)82    if not match:83      raise ParseError(84          'Expectation has invalid syntax on line %d: %s'85          % (line_number, line))86    # Unused group is optional trailing comment.87    reason, raw_conditions, test, results, _ = match.groups()88    conditions = [c for c in raw_conditions.split()] if raw_conditions else []89    for c in conditions:90      if c not in tags:91        raise ParseError(92            'Condition %s not found in expectations tag data. Line %d'93            % (c, line_number))94    return Expectation(reason, test, conditions, [r for r in results.split()])95  @property96  def expectations(self):97    return self._expectations98  @property99  def tags(self):...

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