def assertDetailedTraceback(self, captureVars=False, cleanFailure=False):
        """
        Assert that L{printDetailedTraceback} produces and prints a detailed
        traceback.

        The detailed traceback consists of a header::

          *--- Failure #20 ---

        The body contains the stacktrace::

          /twisted/trial/_synctest.py:1180: _run(...)
          /twisted/python/util.py:1076: runWithWarningsSuppressed(...)
          --- <exception caught here> ---
          /twisted/test/test_failure.py:39: getDivisionFailure(...)

        If C{captureVars} is enabled the body also includes a list of
        globals and locals::

           [ Locals ]
             exampleLocalVar : 'xyz'
             ...
           ( Globals )
             ...

        Or when C{captureVars} is disabled::

           [Capture of Locals and Globals disabled (use captureVars=True)]

        When C{cleanFailure} is enabled references to other objects are removed
        and replaced with strings.

        And finally the footer with the L{Failure}'s value::

          exceptions.ZeroDivisionError: float division
          *--- End of Failure #20 ---

        @param captureVars: Enables L{Failure.captureVars}.
        @type captureVars: C{bool}
        @param cleanFailure: Enables L{Failure.cleanFailure}.
        @type cleanFailure: C{bool}
        """
        if captureVars:
            exampleLocalVar = 'xyz'
            # Silence the linter as this variable is checked via
            # the traceback.
            exampleLocalVar

        f = getDivisionFailure(captureVars=captureVars)
        out = NativeStringIO()
        if cleanFailure:
            f.cleanFailure()
        f.printDetailedTraceback(out)

        tb = out.getvalue()
        start = "*--- Failure #%d%s---\n" % (f.count,
            (f.pickled and ' (pickled) ') or ' ')
        end = "%s: %s\n*--- End of Failure #%s ---\n" % (reflect.qual(f.type),
            reflect.safe_str(f.value), f.count)
        self.assertTracebackFormat(tb, start, end)

        # Variables are printed on lines with 2 leading spaces.
        linesWithVars = [line for line in tb.splitlines()
                             if line.startswith('  ')]

        if captureVars:
            self.assertNotEqual([], linesWithVars)
            if cleanFailure:
                line = '  exampleLocalVar : "\'xyz\'"'
            else:
                line = "  exampleLocalVar : 'xyz'"
            self.assertIn(line, linesWithVars)
        else:
            self.assertEqual([], linesWithVars)
            self.assertIn(' [Capture of Locals and Globals disabled (use '
                'captureVars=True)]\n', tb)

        Assert that L{printDetailedTraceback} produces and prints a detailed
        traceback.

        The detailed traceback consists of a header::

          *--- Failure #20 ---

        The body contains the stacktrace::

          /twisted/trial/_synctest.py:1180: _run(...)
          /twisted/python/util.py:1076: runWithWarningsSuppressed(...)
          --- <exception caught here> ---
          /twisted/test/test_failure.py:39: getDivisionFailure(...)

        If C{captureVars} is enabled the body also includes a list of
        globals and locals::

           [ Locals ]
             exampleLocalVar : 'xyz'
             ...
           ( Globals )
             ...

        Or when C{captureVars} is disabled::

           [Capture of Locals and Globals disabled (use captureVars=True)]

        When C{cleanFailure} is enabled references to other objects are removed
        and replaced with strings.

        And finally the footer with the L{Failure}'s value::

          exceptions.ZeroDivisionError: float division
          *--- End of Failure #20 ---

        @param captureVars: Enables L{Failure.captureVars}.
        @type captureVars: C{bool}
        @param cleanFailure: Enables L{Failure.cleanFailure}.
        @type cleanFailure: C{bool}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/test/test_failure.py