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"""Running tests"""
import sys
import time
import warnings
from . import result
from .case import _SubTest
from .signals import registerResult
__unittest = True
class _WritelnDecorator(object):
"""Used to decorate file-like objects with a handy 'writeln' method"""
def __init__(self,stream):
self.stream = stream
def __getattr__(self, attr):
if attr in ('stream', '__getstate__'):
raise AttributeError(attr)
return getattr(self.stream,attr)
def writeln(self, arg=None):
if arg:
self.write(arg)
self.write('\n') # text-mode streams translate to \r\n if needed
class TextTestResult(result.TestResult):
"""A test result class that can print formatted text results to a stream.
Used by TextTestRunner.
"""
separator1 = '=' * 70
separator2 = '-' * 70
def __init__(self, stream, descriptions, verbosity, *, durations=None):
"""Construct a TextTestResult. Subclasses should accept **kwargs
to ensure compatibility as the interface changes."""
super(TextTestResult, self).__init__(stream, descriptions, verbosity)
self.stream = stream
self.showAll = verbosity > 1
self.dots = verbosity == 1
self.descriptions = descriptions
self._newline = True
self.durations = durations
def getDescription(self, test):
doc_first_line = test.shortDescription()
if self.descriptions and doc_first_line:
return '\n'.join((str(test), doc_first_line))
else:
return str(test)
def startTest(self, test):
super(TextTestResult, self).startTest(test)
if self.showAll:
self.stream.write(self.getDescription(test))
self.stream.write(" ... ")
self.stream.flush()
self._newline = False
def _write_status(self, test, status):
is_subtest = isinstance(test, _SubTest)
if is_subtest or self._newline:
if not self._newline:
self.stream.writeln()
if is_subtest:
self.stream.write(" ")
self.stream.write(self.getDescription(test))
self.stream.write(" ... ")
self.stream.writeln(status)
self.stream.flush()
self._newline = True
def addSubTest(self, test, subtest, err):
if err is not None:
if self.showAll:
if issubclass(err[0], subtest.failureException):
self._write_status(subtest, "FAIL")
else:
self._write_status(subtest, "ERROR")
elif self.dots:
if issubclass(err[0], subtest.failureException):
self.stream.write('F')
else:
self.stream.write('E')
self.stream.flush()
super(TextTestResult, self).addSubTest(test, subtest, err)
def addSuccess(self, test):
super(TextTestResult, self).addSuccess(test)
if self.showAll:
self._write_status(test, "ok")
elif self.dots:
self.stream.write('.')
self.stream.flush()
def addError(self, test, err):
super(TextTestResult, self).addError(test, err)
if self.showAll:
self._write_status(test, "ERROR")
elif self.dots:
self.stream.write('E')
self.stream.flush()
def addFailure(self, test, err):
super(TextTestResult, self).addFailure(test, err)
if self.showAll:
self._write_status(test, "FAIL")
elif self.dots:
self.stream.write('F')
self.stream.flush()
def addSkip(self, test, reason):
super(TextTestResult, self).addSkip(test, reason)
if self.showAll:
self._write_status(test, "skipped {0!r}".format(reason))
elif self.dots:
self.stream.write("s")
self.stream.flush()
def addExpectedFailure(self, test, err):
super(TextTestResult, self).addExpectedFailure(test, err)
if self.showAll:
self.stream.writeln("expected failure")
self.stream.flush()
elif self.dots:
self.stream.write("x")
self.stream.flush()
def addUnexpectedSuccess(self, test):
super(TextTestResult, self).addUnexpectedSuccess(test)
if self.showAll:
self.stream.writeln("unexpected success")
self.stream.flush()
elif self.dots:
self.stream.write("u")
self.stream.flush()
def printErrors(self):
if self.dots or self.showAll:
self.stream.writeln()
self.stream.flush()
self.printErrorList('ERROR', self.errors)
self.printErrorList('FAIL', self.failures)
unexpectedSuccesses = getattr(self, 'unexpectedSuccesses', ())
if unexpectedSuccesses:
self.stream.writeln(self.separator1)
for test in unexpectedSuccesses:
self.stream.writeln(f"UNEXPECTED SUCCESS: {self.getDescription(test)}")
self.stream.flush()
def printErrorList(self, flavour, errors):
for test, err in errors:
self.stream.writeln(self.separator1)
self.stream.writeln("%s: %s" % (flavour,self.getDescription(test)))
self.stream.writeln(self.separator2)
self.stream.writeln("%s" % err)
self.stream.flush()
class TextTestRunner(object):
"""A test runner class that displays results in textual form.
It prints out the names of tests as they are run, errors as they
occur, and a summary of the results at the end of the test run.
"""
resultclass = TextTestResult
def __init__(self, stream=None, descriptions=True, verbosity=1,
failfast=False, buffer=False, resultclass=None, warnings=None,
*, tb_locals=False, durations=None):
"""Construct a TextTestRunner.
Subclasses should accept **kwargs to ensure compatibility as the
interface changes.
"""
if stream is None:
stream = sys.stderr
self.stream = _WritelnDecorator(stream)
self.descriptions = descriptions
self.verbosity = verbosity
self.failfast = failfast
self.buffer = buffer
self.tb_locals = tb_locals
self.durations = durations
self.warnings = warnings
if resultclass is not None:
self.resultclass = resultclass
def _makeResult(self):
try:
return self.resultclass(self.stream, self.descriptions,
self.verbosity, durations=self.durations)
except TypeError:
# didn't accept the durations argument
return self.resultclass(self.stream, self.descriptions,
self.verbosity)
def _printDurations(self, result):
if not result.collectedDurations:
return
ls = sorted(result.collectedDurations, key=lambda x: x[1],
reverse=True)
if self.durations > 0:
ls = ls[:self.durations]
self.stream.writeln("Slowest test durations")
if hasattr(result, 'separator2'):
self.stream.writeln(result.separator2)
hidden = False
for test, elapsed in ls:
if self.verbosity < 2 and elapsed < 0.001:
hidden = True
continue
self.stream.writeln("%-10s %s" % ("%.3fs" % elapsed, test))
if hidden:
self.stream.writeln("\n(durations < 0.001s were hidden; "
"use -v to show these durations)")
else:
self.stream.writeln("")
def run(self, test):
"Run the given test case or test suite."
result = self._makeResult()
registerResult(result)
result.failfast = self.failfast
result.buffer = self.buffer
result.tb_locals = self.tb_locals
with warnings.catch_warnings():
if self.warnings:
# if self.warnings is set, use it to filter all the warnings
warnings.simplefilter(self.warnings)
startTime = time.perf_counter()
startTestRun = getattr(result, 'startTestRun', None)
if startTestRun is not None:
startTestRun()
try:
test(result)
finally:
stopTestRun = getattr(result, 'stopTestRun', None)
if stopTestRun is not None:
stopTestRun()
stopTime = time.perf_counter()
timeTaken = stopTime - startTime
result.printErrors()
if self.durations is not None:
self._printDurations(result)
if hasattr(result, 'separator2'):
self.stream.writeln(result.separator2)
run = result.testsRun
self.stream.writeln("Ran %d test%s in %.3fs" %
(run, run != 1 and "s" or "", timeTaken))
self.stream.writeln()
expectedFails = unexpectedSuccesses = skipped = 0
try:
results = map(len, (result.expectedFailures,
result.unexpectedSuccesses,
result.skipped))
except AttributeError:
pass
else:
expectedFails, unexpectedSuccesses, skipped = results
infos = []
if not result.wasSuccessful():
self.stream.write("FAILED")
failed, errored = len(result.failures), len(result.errors)
if failed:
infos.append("failures=%d" % failed)
if errored:
infos.append("errors=%d" % errored)
elif run == 0 and not skipped:
self.stream.write("NO TESTS RAN")
else:
self.stream.write("OK")
if skipped:
infos.append("skipped=%d" % skipped)
if expectedFails:
infos.append("expected failures=%d" % expectedFails)
if unexpectedSuccesses:
infos.append("unexpected successes=%d" % unexpectedSuccesses)
if infos:
self.stream.writeln(" (%s)" % (", ".join(infos),))
else:
self.stream.write("\n")
self.stream.flush()
return result