=================================== FAILURES ===================================
_________________________ TestLink.test_depositor_link _________________________

self = <cli_tests.TestLink testMethod=test_depositor_link>

    def test_depositor_link(self):
>       result = runner.invoke(cli.link, ["test_depositor.py", "--outputs", "['bar2.txt']"])

cli_tests.py:41: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <click.testing.CliRunner object at 0x7f2c833a6cc0>
cli = <click.core.Command object at 0x7f2c82e7a5f8>
args = ['test_depositor.py', '--outputs', "['bar2.txt']"], input = None
env = None, catch_exceptions = True, color = False, extra = {}
exc_info = (<class 'SystemExit'>, SystemExit(0,), <traceback object at 0x7f2c82e1eb08>)
out = <_io.BytesIO object at 0x7f2c82e0a5c8>, exception = None, exit_code = 0

    def invoke(self, cli, args=None, input=None, env=None,
               catch_exceptions=True, color=False, **extra):
        """Invokes a command in an isolated environment.  The arguments are
            forwarded directly to the command line script, the `extra` keyword
            arguments are passed to the :meth:`~clickpkg.Command.main` function of
            the command.
    
            This returns a :class:`Result` object.
    
            .. versionadded:: 3.0
               The ``catch_exceptions`` parameter was added.
    
            .. versionchanged:: 3.0
               The result object now has an `exc_info` attribute with the
               traceback if available.
    
            .. versionadded:: 4.0
               The ``color`` parameter was added.
    
            :param cli: the command to invoke
            :param args: the arguments to invoke
            :param input: the input data for `sys.stdin`.
            :param env: the environment overrides.
            :param catch_exceptions: Whether to catch any other exceptions than
                                     ``SystemExit``.
            :param extra: the keyword arguments to pass to :meth:`main`.
            :param color: whether the output should contain color codes. The
                          application can still override this explicitly.
            """
        exc_info = None
        with self.isolation(input=input, env=env, color=color) as out:
            exception = None
            exit_code = 0
    
            try:
                cli.main(args=args or (),
                         prog_name=self.get_default_prog_name(cli), **extra)
            except SystemExit as e:
                if e.code != 0:
                    exception = e
    
                exc_info = sys.exc_info()
    
                exit_code = e.code
                if not isinstance(exit_code, int):
                    sys.stdout.write(str(exit_code))
                    sys.stdout.write('\n')
                    exit_code = 1
            except Exception as e:
                if not catch_exceptions:
                    raise
                exception = e
                exit_code = -1
                exc_info = sys.exc_info()
            finally:
                sys.stdout.flush()
>               output = out.getvalue()
E               ValueError: I/O operation on closed file.

../../../miniconda3/envs/datablocks-dev/lib/python3.6/site-packages/click/testing.py:299: ValueError
========================== 1 failed in 37.10 seconds ===========================