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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
tests	[ DIR ]	drwxr-xr-x
__init__.py	1.19 KB	-rw-r--r--
comparison.py	39.14 KB	-rw-r--r--
compat.py	224 B	-rw-r--r--
components.py	1.31 KB	-rw-r--r--
datetime.py	24.42 KB	-rw-r--r--
django.py	2.88 KB	-rw-r--r--
logcapture.py	10.75 KB	-rw-r--r--
mock.py	1.21 KB	-rw-r--r--
outputcapture.py	4.69 KB	-rw-r--r--
popen.py	9.89 KB	-rw-r--r--
replace.py	12.15 KB	-rw-r--r--
resolve.py	2.05 KB	-rw-r--r--
rmtree.py	2.52 KB	-rw-r--r--
shouldraise.py	3.58 KB	-rw-r--r--
shouldwarn.py	2.21 KB	-rw-r--r--
sybil.py	2.28 KB	-rw-r--r--
tempdirectory.py	12.89 KB	-rw-r--r--
twisted.py	4.8 KB	-rw-r--r--
utils.py	2.74 KB	-rw-r--r--
version.txt	6 B	-rw-r--r--

Code Editor : outputcapture.py

import os
import sys
from io import StringIO
from tempfile import TemporaryFile

from testfixtures.comparison import compare

class OutputCapture(object):
    """
    A context manager for capturing output to the
    :any:`sys.stdout` and :any:`sys.stderr` streams.

:param separate: If ``True``, ``stdout`` and ``stderr`` will be captured
                     separately and their expected values must be passed to
                     :meth:`~OutputCapture.compare`.

:param fd: If ``True``, the underlying file descriptors will be captured,
               rather than just the attributes on :mod:`sys`. This allows
               you to capture things like subprocesses that write directly
               to the file descriptors, but is more invasive, so only use it
               when you need it.

:param strip_whitespace:
        When ``True``, which is the default, leading and training whitespace
        is trimmed from both the expected and actual values when comparing.

.. note:: If ``separate`` is passed as ``True``,
              :attr:`OutputCapture.captured` will be an empty string.
    """

original_stdout = None
    original_stderr = None

def __init__(self, separate: bool = False, fd: bool = False, strip_whitespace: bool = True):
        self.separate = separate
        self.fd = fd
        self.strip_whitespace = strip_whitespace

def __enter__(self):
        if self.fd:
            self.output = TemporaryFile()
            self.stdout = TemporaryFile()
            self.stderr = TemporaryFile()
        else:
            self.output = StringIO()
            self.stdout = StringIO()
            self.stderr = StringIO()
        self.enable()
        return self

def __exit__(self, *args):
        self.disable()

def disable(self):
        "Disable the output capture if it is enabled."
        if self.fd:
            for original, current in (
                (self.original_stdout, sys.stdout),
                (self.original_stderr, sys.stderr),
            ):
                os.dup2(original, current.fileno())
                os.close(original)

else:
            sys.stdout = self.original_stdout
            sys.stderr = self.original_stderr

def enable(self):
        "Enable the output capture if it is disabled."
        if self.original_stdout is None:
            if self.fd:
                self.original_stdout = os.dup(sys.stdout.fileno())
                self.original_stderr = os.dup(sys.stderr.fileno())
            else:
                self.original_stdout = sys.stdout
                self.original_stderr = sys.stderr
        if self.separate:
            if self.fd:
                os.dup2(self.stdout.fileno(), sys.stdout.fileno())
                os.dup2(self.stderr.fileno(), sys.stderr.fileno())
            else:
                sys.stdout = self.stdout
                sys.stderr = self.stderr
        else:
            if self.fd:
                os.dup2(self.output.fileno(), sys.stdout.fileno())
                os.dup2(self.output.fileno(), sys.stderr.fileno())
            else:
                sys.stdout = sys.stderr = self.output

def _read(self, stream):
        if self.fd:
            stream.seek(0)
            return stream.read().decode()
        else:
            return stream.getvalue()

@property
    def captured(self) -> str:
        "A property containing any output that has been captured so far."
        return self._read(self.output)

def compare(self, expected: str = '', stdout: str = '', stderr: str = ''):
        """
        Compare the captured output to that expected. If the output is
        not the same, an :class:`AssertionError` will be raised.

:param expected: A string containing the expected combined output
                         of ``stdout`` and ``stderr``.

:param stdout: A string containing the expected output to ``stdout``.

:param stderr: A string containing the expected output to ``stderr``.
        """
        expected_mapping = {}
        actual_mapping = {}
        for prefix, _expected, captured in (
                ('captured', expected, self.captured),
                ('stdout', stdout, self._read(self.stdout)),
                ('stderr', stderr, self._read(self.stderr)),
        ):
            if self.strip_whitespace:
                _expected = _expected.strip()
                captured = captured.strip()
            if _expected != captured:
                expected_mapping[prefix] = _expected
                actual_mapping[prefix] = captured
        if len(expected_mapping) == 1:
            compare(expected=tuple(expected_mapping.values())[0],
                    actual=tuple(actual_mapping.values())[0])
        compare(expected=expected_mapping, actual=actual_mapping)

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Code Editor : outputcapture.py