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"""Test result object"""

import io

import sys

import traceback

from . import util

from functools import wraps

__unittest = True

def failfast(method):

@wraps(method)

def inner(self, *args, **kw):

if getattr(self, 'failfast', False):

self.stop()

return method(self, *args, **kw)

return inner

STDOUT_LINE = '\nStdout:\n%s'

STDERR_LINE = '\nStderr:\n%s'

class TestResult(object):

"""Holder for test result information.

Test results are automatically managed by the TestCase and TestSuite

classes, and do not need to be explicitly manipulated by writers of tests.

Each instance holds the total number of tests run, and collections of

failures and errors that occurred among those test runs. The collections

contain tuples of (testcase, exceptioninfo), where exceptioninfo is the

formatted traceback of the error that occurred.

"""

_previousTestClass = None

_testRunEntered = False

_moduleSetUpFailed = False

def __init__(self, stream=None, descriptions=None, verbosity=None):

self.failfast = False

self.failures = []

self.errors = []

self.testsRun = 0

self.skipped = []

self.expectedFailures = []

self.unexpectedSuccesses = []

self.shouldStop = False

self.buffer = False

self.tb_locals = False

self._stdout_buffer = None

self._stderr_buffer = None

self._original_stdout = sys.stdout

self._original_stderr = sys.stderr

self._mirrorOutput = False

def printErrors(self):

"Called by TestRunner after test run"

def startTest(self, test):

"Called when the given test is about to be run"

self.testsRun += 1

self._mirrorOutput = False

self._setupStdout()

def _setupStdout(self):

if self.buffer:

if self._stderr_buffer is None:

self._stderr_buffer = io.StringIO()

self._stdout_buffer = io.StringIO()

sys.stdout = self._stdout_buffer

sys.stderr = self._stderr_buffer

def startTestRun(self):

"""Called once before any tests are executed.

See startTest for a method called before each test.

"""

def stopTest(self, test):

"""Called when the given test has been run"""

self._restoreStdout()

self._mirrorOutput = False

def _restoreStdout(self):

if self.buffer:

if self._mirrorOutput:

output = sys.stdout.getvalue()

error = sys.stderr.getvalue()

if output:

if not output.endswith('\n'):

output += '\n'

self._original_stdout.write(STDOUT_LINE % output)

if error:

if not error.endswith('\n'):

error += '\n'

self._original_stderr.write(STDERR_LINE % error)

sys.stdout = self._original_stdout

sys.stderr = self._original_stderr

self._stdout_buffer.seek(0)

self._stdout_buffer.truncate()

self._stderr_buffer.seek(0)

self._stderr_buffer.truncate()

def stopTestRun(self):

"""Called once after all tests are executed.

See stopTest for a method called after each test.

"""

@failfast

def addError(self, test, err):

"""Called when an error has occurred. 'err' is a tuple of values as

returned by sys.exc_info().

"""

self.errors.append((test, self._exc_info_to_string(err, test)))

self._mirrorOutput = True

@failfast

def addFailure(self, test, err):

"""Called when an error has occurred. 'err' is a tuple of values as

returned by sys.exc_info()."""

self.failures.append((test, self._exc_info_to_string(err, test)))

self._mirrorOutput = True

def addSubTest(self, test, subtest, err):

"""Called at the end of a subtest.

'err' is None if the subtest ended successfully, otherwise it's a

tuple of values as returned by sys.exc_info().

"""

# By default, we don't do anything with successful subtests, but

# more sophisticated test results might want to record them.

if err is not None:

if getattr(self, 'failfast', False):

self.stop()

if issubclass(err[0], test.failureException):

errors = self.failures

else:

errors = self.errors

errors.append((subtest, self._exc_info_to_string(err, test)))

self._mirrorOutput = True

def addSuccess(self, test):

"Called when a test has completed successfully"

pass

def addSkip(self, test, reason):

"""Called when a test is skipped."""

self.skipped.append((test, reason))

def addExpectedFailure(self, test, err):

"""Called when an expected failure/error occurred."""

self.expectedFailures.append(

(test, self._exc_info_to_string(err, test)))

@failfast

def addUnexpectedSuccess(self, test):

"""Called when a test was expected to fail, but succeed."""

self.unexpectedSuccesses.append(test)

def wasSuccessful(self):

"""Tells whether or not this result was a success."""

# The hasattr check is for test_result's OldResult test. That

# way this method works on objects that lack the attribute.

# (where would such result intances come from? old stored pickles?)

return ((len(self.failures) == len(self.errors) == 0) and

(not hasattr(self, 'unexpectedSuccesses') or

len(self.unexpectedSuccesses) == 0))

def stop(self):

"""Indicates that the tests should be aborted."""

self.shouldStop = True

def _exc_info_to_string(self, err, test):

"""Converts a sys.exc_info()-style tuple of values into a string."""

exctype, value, tb = err

# Skip test runner traceback levels

while tb and self._is_relevant_tb_level(tb):

tb = tb.tb_next

if exctype is test.failureException:

# Skip assert*() traceback levels

length = self._count_relevant_tb_levels(tb)

else:

length = None

tb_e = traceback.TracebackException(

exctype, value, tb, limit=length, capture_locals=self.tb_locals)

msgLines = list(tb_e.format())

if self.buffer:

output = sys.stdout.getvalue()

error = sys.stderr.getvalue()

if output:

if not output.endswith('\n'):

output += '\n'

msgLines.append(STDOUT_LINE % output)

if error:

if not error.endswith('\n'):

error += '\n'

msgLines.append(STDERR_LINE % error)

return ''.join(msgLines)

def _is_relevant_tb_level(self, tb):

return '__unittest' in tb.tb_frame.f_globals

def _count_relevant_tb_levels(self, tb):

length = 0

while tb and not self._is_relevant_tb_level(tb):

length += 1

tb = tb.tb_next

return length

def __repr__(self):

return ("<%s run=%i errors=%i failures=%i>" %

(util.strclass(self.__class__), self.testsRun, len(self.errors),

len(self.failures)))

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