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'''Test runner and result class for the regression test suite.
'''
import functools
import io
import sys
import time
import traceback
import unittest
import xml.etree.ElementTree as ET
from datetime import datetime
class RegressionTestResult(unittest.TextTestResult):
separator1 = '=' * 70 + '\n'
separator2 = '-' * 70 + '\n'
def __init__(self, stream, descriptions, verbosity):
super().__init__(stream=stream, descriptions=descriptions, verbosity=0)
self.buffer = True
self.__suite = ET.Element('testsuite')
self.__suite.set('start', datetime.utcnow().isoformat(' '))
self.__e = None
self.__start_time = None
self.__results = []
self.__verbose = bool(verbosity)
@classmethod
def __getId(cls, test):
try:
test_id = test.id
except AttributeError:
return str(test)
try:
return test_id()
except TypeError:
return str(test_id)
return repr(test)
def startTest(self, test):
super().startTest(test)
self.__e = e = ET.SubElement(self.__suite, 'testcase')
self.__start_time = time.perf_counter()
if self.__verbose:
self.stream.write('{} ... '.format(self.getDescription(test)))
self.stream.flush()
def _add_result(self, test, capture=False, **args):
e = self.__e
self.__e = None
if e is None:
return
e.set('name', args.pop('name', self.__getId(test)))
e.set('status', args.pop('status', 'run'))
e.set('result', args.pop('result', 'completed'))
if self.__start_time:
e.set('time', '{:0.6f}'.format(time.perf_counter() - self.__start_time))
if capture:
stdout = self._stdout_buffer.getvalue().rstrip()
ET.SubElement(e, 'system-out').text = stdout
stderr = self._stderr_buffer.getvalue().rstrip()
ET.SubElement(e, 'system-err').text = stderr
for k, v in args.items():
if not k or not v:
continue
e2 = ET.SubElement(e, k)
if hasattr(v, 'items'):
for k2, v2 in v.items():
if k2:
e2.set(k2, str(v2))
else:
e2.text = str(v2)
else:
e2.text = str(v)
def __write(self, c, word):
if self.__verbose:
self.stream.write('{}\n'.format(word))
@classmethod
def __makeErrorDict(cls, err_type, err_value, err_tb):
if isinstance(err_type, type):
if err_type.__module__ == 'builtins':
typename = err_type.__name__
else:
typename = '{}.{}'.format(err_type.__module__, err_type.__name__)
else:
typename = repr(err_type)
msg = traceback.format_exception(err_type, err_value, None)
tb = traceback.format_exception(err_type, err_value, err_tb)
return {
'type': typename,
'message': ''.join(msg),
'': ''.join(tb),
}
def addError(self, test, err):
self._add_result(test, True, error=self.__makeErrorDict(*err))
super().addError(test, err)
self.__write('E', 'ERROR')
def addExpectedFailure(self, test, err):
self._add_result(test, True, output=self.__makeErrorDict(*err))
super().addExpectedFailure(test, err)
self.__write('x', 'expected failure')
def addFailure(self, test, err):
self._add_result(test, True, failure=self.__makeErrorDict(*err))
super().addFailure(test, err)
self.__write('F', 'FAIL')
def addSkip(self, test, reason):
self._add_result(test, skipped=reason)
super().addSkip(test, reason)
self.__write('S', 'skipped {!r}'.format(reason))
def addSuccess(self, test):
self._add_result(test)
super().addSuccess(test)
self.__write('.', 'ok')
def addUnexpectedSuccess(self, test):
self._add_result(test, outcome='UNEXPECTED_SUCCESS')
super().addUnexpectedSuccess(test)
self.__write('u', 'unexpected success')
def printErrors(self):
if self.__verbose:
self.stream.write('\n')
self.printErrorList('ERROR', self.errors)
self.printErrorList('FAIL', self.failures)
def printErrorList(self, flavor, errors):
for test, err in errors:
self.stream.write(self.separator1)
self.stream.write('{}: {}\n'.format(flavor, self.getDescription(test)))
self.stream.write(self.separator2)
self.stream.write('{}\n'.format(err))
def get_xml_element(self):
e = self.__suite
e.set('tests', str(self.testsRun))
e.set('errors', str(len(self.errors)))
e.set('failures', str(len(self.failures)))
return e
class QuietRegressionTestRunner:
def __init__(self, stream):
self.result = RegressionTestResult(stream, None, 0)
def run(self, test):
test(self.result)
return self.result
def get_test_runner_class(verbosity):
if verbosity:
return functools.partial(unittest.TextTestRunner,
resultclass=RegressionTestResult,
buffer=True,
verbosity=verbosity)
return QuietRegressionTestRunner
def get_test_runner(stream, verbosity):
return get_test_runner_class(verbosity)(stream)
if __name__ == '__main__':
class TestTests(unittest.TestCase):
def test_pass(self):
pass
def test_pass_slow(self):
time.sleep(1.0)
def test_fail(self):
print('stdout', file=sys.stdout)
print('stderr', file=sys.stderr)
self.fail('failure message')
def test_error(self):
print('stdout', file=sys.stdout)
print('stderr', file=sys.stderr)
raise RuntimeError('error message')
suite = unittest.TestSuite()
suite.addTest(unittest.makeSuite(TestTests))
stream = io.StringIO()
runner_cls = get_test_runner_class(sum(a == '-v' for a in sys.argv))
runner = runner_cls(sys.stdout)
result = runner.run(suite)
print('Output:', stream.getvalue())
print('XML: ', end='')
for s in ET.tostringlist(result.get_xml_element()):
print(s.decode(), end='')
print()
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