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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):
def __init__(self, stream, descriptions, verbosity):
super().__init__(stream=stream, descriptions=descriptions,
verbosity=2 if verbosity else 0)
self.buffer = True
self.__suite = ET.Element('testsuite')
self.__suite.set('start', datetime.utcnow().isoformat(' '))
self.__e = None
self.__start_time = None
@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()
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', f'{time.perf_counter() - self.__start_time:0.6f}')
if capture:
if self._stdout_buffer is not None:
stdout = self._stdout_buffer.getvalue().rstrip()
ET.SubElement(e, 'system-out').text = stdout
if self._stderr_buffer is not None:
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)
@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 = f'{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)
def addExpectedFailure(self, test, err):
self._add_result(test, True, output=self.__makeErrorDict(*err))
super().addExpectedFailure(test, err)
def addFailure(self, test, err):
self._add_result(test, True, failure=self.__makeErrorDict(*err))
super().addFailure(test, err)
def addSkip(self, test, reason):
self._add_result(test, skipped=reason)
super().addSkip(test, reason)
def addSuccess(self, test):
self._add_result(test)
super().addSuccess(test)
def addUnexpectedSuccess(self, test):
self._add_result(test, outcome='UNEXPECTED_SUCCESS')
super().addUnexpectedSuccess(test)
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, buffer=False):
self.result = RegressionTestResult(stream, None, 0)
self.result.buffer = buffer
def run(self, test):
test(self.result)
return self.result
def get_test_runner_class(verbosity, buffer=False):
if verbosity:
return functools.partial(unittest.TextTestRunner,
resultclass=RegressionTestResult,
buffer=buffer,
verbosity=verbosity)
return functools.partial(QuietRegressionTestRunner, buffer=buffer)
def get_test_runner(stream, verbosity, capture_output=False):
return get_test_runner_class(verbosity, capture_output)(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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