[execnet-dev] testing vim with execnet

[Adam]

Hi Holger,

holger krekel wrote:

> On Wed, Nov 18, 2009 at 12:55 +0100, Adam wrote:

> > However I can't access any of vim's python objects directly. I can only
> > let vim manipulate them (via vim.command) and exchange strings over
> > vim.current.buffer. e.g.:

> yes, true and nothing that could easily change i think. 

Ok. This surprised me as socketserver has access to these. 

> Maybe you could try to extract values via 'vim.eval'? 

vim.eval gives access to vim-script but not vim's python. This gave me
the right hint for the solution (see below).

> I haven't used the vim-python-plugin myself yet, btw.

I didn't assume that. I asked here because I thought it wasn't needed
(see two above).

> > unpickling strings exchanged over vim.current.buffer fails, too.
> 
> not sure what you mean - Strings should be sendable/receiveable. what
> exactly fails? 

I thought that pickle strings where too exotic for vim.current.buffer.
Now, I really have no clue, what fails.[1] Pickling over vim.eval does
works, however.[2] Thank you for the idea. Now I'll work on sugaring it.
Problem solved.

--Adam


[1] I'm either making a stupid mistake or something really funky is
    going on. If I type this into vim directly (without the vim.command
    everything works.

    Left for the interested. Irrelevant now as [2] works well:

    >>> def test_execnet_buffer_pickle(vim_gateway):
    >>>     import pickle
    >>>     channel = vim_gateway.remote_exec(r"""
    ...         import vim
    ...         vim.command('py import pickle')
    ...         vim.command('py import vim')
    ...         vim.command('py b = pickle.dumps([1, 2, 3])')
    ...         vim.command('py if b == "": b = "empty"')
    ...         vim.command('py vim.current.buffer[0] = b.split("\n")[0]')
    ...         vim.command('py if vim.current.buffer[0] == "": vim.current.buffer[0] = "broken"')
    >>>         channel.send(vim.current.buffer[0])""")
    >>>     buf = channel.receive()
    >>>     channel.close()
    >>>     assert buf != 'broken'    # fails
    >>>     #assert '\n'.join(buf) == pickle.dumps([1, 2, 3])    # '(lp0\nI1\naI2\naI3\na.'


[2] The solution:

    >>> def test_execnet_eval_pickle(vim_gateway):
    >>>     import pickle
    >>>     channel = vim_gateway.remote_exec(r"""
    ...         import vim
    ...         vim.command('py import pickle')
    ...         vim.command('py import vim')
    ...         vim.command('py b = pickle.dumps([1, 2, 3])')
    ...         vim.command('''py vim.command("let execnet='%s'" % b)''')
    ...         b = vim.eval("execnet")
    ...         channel.send(b)""")
    >>>     buf = channel.receive()
    >>>     channel.close()
    >>>     assert buf == pickle.dumps([1, 2, 3])    # passes
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