| # Copyright (c) 2017 Mark D. Hill and David A. Wood |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer; |
| # redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution; |
| # neither the name of the copyright holders nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| # Authors: Sean Wilson |
| |
| ''' |
| Contains the :class:`Loader` which is responsible for discovering and loading |
| tests. |
| |
| Loading typically follows the following stages. |
| |
| 1. Recurse down a given directory looking for tests which match a given regex. |
| |
| The default regex used will match any python file (ending in .py) that has |
| a name starting or ending in test(s). If there are any additional |
| components of the name they must be connected with '-' or '_'. Lastly, |
| file names that begin with '.' will be ignored. |
| |
| The following names would match: |
| |
| - `tests.py` |
| - `test.py` |
| - `test-this.py` |
| - `tests-that.py` |
| - `these-test.py` |
| |
| These would not match: |
| |
| - `.test.py` - 'hidden' files are ignored. |
| - `test` - Must end in '.py' |
| - `test-.py` - Needs a character after the hypen. |
| - `testthis.py` - Needs a hypen or underscore to separate 'test' and 'this' |
| |
| |
| 2. With all files discovered execute each file gathering its test items we |
| care about collecting. (`TestCase`, `TestSuite` and `Fixture` objects.) |
| |
| As a final note, :class:`TestCase` instances which are not put into |
| a :class:`TestSuite` by the test writer will be placed into |
| a :class:`TestSuite` named after the module. |
| |
| .. seealso:: :func:`load_file` |
| ''' |
| |
| import os |
| import re |
| import sys |
| import traceback |
| |
| import config |
| import log |
| import suite as suite_mod |
| import test as test_mod |
| import fixture as fixture_mod |
| import wrappers |
| import uid |
| |
| class DuplicateTestItemException(Exception): |
| ''' |
| Exception indicates multiple test items with the same UID |
| were discovered. |
| ''' |
| pass |
| |
| |
| # Match filenames that either begin or end with 'test' or tests and use |
| # - or _ to separate additional name components. |
| default_filepath_regex = re.compile( |
| r'(((.+[_])?tests?)|(tests?([-_].+)?))\.py$') |
| |
| def default_filepath_filter(filepath): |
| '''The default filter applied to filepaths to marks as test sources.''' |
| filepath = os.path.basename(filepath) |
| if default_filepath_regex.match(filepath): |
| # Make sure doesn't start with . |
| return not filepath.startswith('.') |
| return False |
| |
| def path_as_modulename(filepath): |
| '''Return the given filepath as a module name.''' |
| # Remove the file extention (.py) |
| return os.path.splitext(os.path.basename(filepath))[0] |
| |
| def path_as_suitename(filepath): |
| return os.path.split(os.path.dirname(os.path.abspath((filepath))))[-1] |
| |
| def _assert_files_in_same_dir(files): |
| if __debug__: |
| if files: |
| directory = os.path.dirname(files[0]) |
| for f in files: |
| assert os.path.dirname(f) == directory |
| |
| class Loader(object): |
| ''' |
| Class for discovering tests. |
| |
| Discovered :class:`TestCase` and :class:`TestSuite` objects are wrapped by |
| :class:`LoadedTest` and :class:`LoadedSuite` objects respectively. |
| These objects provided additional methods and metadata about the loaded |
| objects and are the internal representation used by testlib. |
| |
| To simply discover and load all tests using the default filter create an |
| instance and `load_root`. |
| |
| >>> import os |
| >>> tl = Loader() |
| >>> tl.load_root(os.getcwd()) |
| |
| .. note:: If tests are not contained in a TestSuite, they will |
| automatically be placed into one for the module. |
| |
| .. warn:: This class is extremely thread-unsafe. |
| It modifies the sys path and global config. |
| Use with care. |
| ''' |
| def __init__(self): |
| self.suites = [] |
| self.suite_uids = {} |
| self.filepath_filter = default_filepath_filter |
| |
| # filepath -> Successful | Failed to load |
| self._files = {} |
| |
| @property |
| def schedule(self): |
| return wrappers.LoadedLibrary(self.suites, fixture_mod.global_fixtures) |
| |
| def load_schedule_for_suites(self, *uids): |
| files = {uid.UID.uid_to_path(id_) for id_ in uids} |
| for file_ in files: |
| self.load_file(file_) |
| |
| return wrappers.LoadedLibrary( |
| [self.suite_uids[id_] for id_ in uids], |
| fixture_mod.global_fixtures) |
| |
| def _verify_no_duplicate_suites(self, new_suites): |
| new_suite_uids = self.suite_uids.copy() |
| for suite in new_suites: |
| if suite.uid in new_suite_uids: |
| raise DuplicateTestItemException( |
| "More than one suite with UID '%s' was defined" %\ |
| suite.uid) |
| new_suite_uids[suite.uid] = suite |
| |
| def _verify_no_duplicate_tests_in_suites(self, new_suites): |
| for suite in new_suites: |
| test_uids = set() |
| for test in suite: |
| if test.uid in test_uids: |
| raise DuplicateTestItemException( |
| "More than one test with UID '%s' was defined" |
| " in suite '%s'" |
| % (test.uid, suite.uid)) |
| test_uids.add(test.uid) |
| |
| def load_root(self, root): |
| ''' |
| Load files from the given root directory which match |
| `self.filepath_filter`. |
| ''' |
| if __debug__: |
| self._loaded_a_file = True |
| |
| for directory in self._discover_files(root): |
| if directory: |
| _assert_files_in_same_dir(directory) |
| for f in directory: |
| self.load_file(f) |
| |
| def load_dir(self, directory): |
| for dir_ in self._discover_files(directory): |
| _assert_files_in_same_dir(dir_) |
| for f in dir_: |
| self.load_file(f) |
| |
| def load_file(self, path): |
| path = os.path.abspath(path) |
| |
| if path in self._files: |
| if not self._files[path]: |
| raise Exception('Attempted to load a file which already' |
| ' failed to load') |
| else: |
| log.test_log.debug('Tried to reload: %s' % path) |
| return |
| |
| # Create a custom dictionary for the loaded module. |
| newdict = { |
| '__builtins__':__builtins__, |
| '__name__': path_as_modulename(path), |
| '__file__': path, |
| } |
| |
| # Add the file's containing directory to the system path. So it can do |
| # relative imports naturally. |
| old_path = sys.path[:] |
| sys.path.insert(0, os.path.dirname(path)) |
| cwd = os.getcwd() |
| os.chdir(os.path.dirname(path)) |
| config.config.file_under_load = path |
| |
| new_tests = test_mod.TestCase.collector.create() |
| new_suites = suite_mod.TestSuite.collector.create() |
| new_fixtures = fixture_mod.Fixture.collector.create() |
| |
| def cleanup(): |
| config.config.file_under_load = None |
| sys.path[:] = old_path |
| os.chdir(cwd) |
| test_mod.TestCase.collector.remove(new_tests) |
| suite_mod.TestSuite.collector.remove(new_suites) |
| fixture_mod.Fixture.collector.remove(new_fixtures) |
| |
| try: |
| execfile(path, newdict, newdict) |
| except Exception as e: |
| log.test_log.debug(traceback.format_exc()) |
| log.test_log.warn( |
| 'Exception thrown while loading "%s"\n' |
| 'Ignoring all tests in this file.' |
| % (path)) |
| cleanup() |
| return |
| |
| # Create a module test suite for those not contained in a suite. |
| orphan_tests = set(new_tests) |
| for suite in new_suites: |
| for test in suite: |
| # Remove the test if it wasn't already removed. |
| # (Suites may contain copies of tests.) |
| if test in orphan_tests: |
| orphan_tests.remove(test) |
| if orphan_tests: |
| orphan_tests = sorted(orphan_tests, key=new_tests.index) |
| # FIXME Use the config based default to group all uncollected |
| # tests. |
| # NOTE: This is automatically collected (we still have the |
| # collector active.) |
| suite_mod.TestSuite(tests=orphan_tests, |
| name=path_as_suitename(path)) |
| |
| try: |
| loaded_suites = [wrappers.LoadedSuite(suite, path) |
| for suite in new_suites] |
| |
| self._verify_no_duplicate_suites(loaded_suites) |
| self._verify_no_duplicate_tests_in_suites(loaded_suites) |
| except Exception as e: |
| log.test_log.warn('%s\n' |
| 'Exception thrown while loading "%s"\n' |
| 'Ignoring all tests in this file.' |
| % (traceback.format_exc(), path)) |
| else: |
| log.test_log.info('Discovered %d tests and %d suites in %s' |
| '' % (len(new_tests), len(loaded_suites), path)) |
| |
| self.suites.extend(loaded_suites) |
| self.suite_uids.update({suite.uid: suite |
| for suite in loaded_suites}) |
| cleanup() |
| |
| def _discover_files(self, root): |
| ''' |
| Recurse down from the given root directory returning a list of |
| directories which contain a list of files matching |
| `self.filepath_filter`. |
| ''' |
| # Will probably want to order this traversal. |
| for root, dirnames, filenames in os.walk(root): |
| dirnames.sort() |
| if filenames: |
| filenames.sort() |
| filepaths = [os.path.join(root, filename) \ |
| for filename in filenames] |
| filepaths = filter(self.filepath_filter, filepaths) |
| if filepaths: |
| yield filepaths |
