Due to some weird race conditions the temporary directories were not
getting torn down for four of the tests. I failed to figure out why, and
I found that using TestHelper to manage the temporary directory somehow
fixes this.
When unix tools make use of an external editor, they typically check the
environment variable VISUAL and fall back to EDITOR. This commit adds the
additional check for VISUAL to the existing EDITOR check (where VISUAL is
preferred over EDITOR).
External Python packages interfacing beets may want to use an in-memory
beets library instance for testing beets-related code.
The `TestHelper` class is very helpful for this purpose.
Previously `TestHelper` was located in the `test/` directory.
Now it is part of `beets` itself (`beets.test.helper.TestHelper`) and
can be easily imported.
This was a vestige from when we used to need the unittest2 library for pre-2.7
compatibility. Now that we require Python 2.7, we aren't using that library
and this indirection wasn't doing any good.
This reverts commit 9c41c39913.
That commit used byte strings for the `if __name__ == '__main__'` pattern,
which was necessary when we were doing unicode_literals. But it is wrong on
Python 3, and now that we're liberated from unicode_literals, we need to go
back to native strings for this comparison.
interactive_open() takes a target and an optional command, if it does not
receive a command then it uses open_anything().
It parses command and lexes it with shlex.split(), revieling the client
from that task.
"config -e" command uses it, and gives a better error message in case of
problem. "play" plugin uses it as well, as side-effect being that the
command is now interactive, as requested in issue #1321.
Fix issue #1321.
Include import of __future__ features division, absolute_imports and
print_function everywhere. Don't add unicode_literals yet for it is
harder to convert.
Goal is smoothing the transition to python 3.
