[IPython-dev] What is the best way to write unit test for Magics Classes?

Aquil H. Abdullah aquil.abdullah@gmail....
Sun Mar 31 21:39:48 CDT 2013

Hello All,

I am working on an application that uses IPython for a user interface.
Basically, I need to interact with the results of a long running process.
 I've decided to use the InteracteShellEmbed class along with a Magics
subclass to make things a little bit easier for the users.

I like to write unit tests as I develop my code, but it isn't quite clear
to me how to unit tests classes that inherit from Magics and are decorated
by line_magic or needs_local_scope.

For example, let's say I have the following code:

class AppMagics(Magics):
    Application magics to do stuff
    def peek_a_boo(self, line, local_ns=None):
        In [Peek 2]: x = 10

        In [Peek 3]: %peek_a_boo x
        Out[Peek 3]: 420
        var = local_ns.get(line)
        cool_stuff = 42 * int(var)
        return col_stuff

In this instance I can use a a doc-test, however after reading the Dev:
Testing page on github ,
https://github.com/ipython/ipython/wiki/Dev%3A-Testing.  It looks like I'll
have to make some modifications which I don't quite understand.

Can anyone provide me with some resources for a newb to figure out how to
right unit tests for Magics?

Aquil H. Abdullah
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