source: tests/config.txt @ 1367:8b005de437e6

MISSING: tests for nearly everything that has to do with the config file (i.e.
                 no permissions, external changes, etc)
                 tests for some parts of Configuration's dict interface (iter* etc)


Basics:

        >>> app.cfg                             # doctest: +ELLIPSIS
        <Configuration ...>
        >>> app.cfg['blog_title']
        iu'My Zine Blog'


Are those changes written to the config file correctly?
        
        >>> app.cfg.change_single('pings_enabled', False)
        >>> [line for line in open(app.cfg.filename) if 'pings_enabled' in line][0]
        'pings_enabled = False\n'


Basic transaction test. Also tests that default values are not written to the
config file.

        >>> t = app.cfg.edit()
        >>> t['pings_enabled'] = True
        >>> t['blog_title']
        iu'My Zine Blog'
        >>> t['blog_title'] = 'Another Blog Title'
        >>> t.commit()
        >>> len([line for line in open(app.cfg.filename) if 'pings_enabled' in line])
        0
        >>> app.cfg['blog_title']
        u'Another Blog Title'


Test revert_to_default

        >>> t = app.cfg.edit()
        >>> t.revert_to_default('blog_title')
        >>> t['blog_title']
        iu'My Zine Blog'
        >>> t.commit()
        >>> app.cfg['blog_title']
        iu'My Zine Blog'


Transactions can only be committed once:
        
        >>> t.commit()
        Traceback (most recent call last):
        ...
        ValueError: This transaction was already committed.


Somewhat bigger transaction. Tests update(), set_from_string() and if changes
are really only written to the config when the transaction is committed.

        >>> big_t = app.cfg.edit()
        >>> big_t.update({'zine/blog_tagline': '...and the test goes on',
        ...               'language': 'de'})
        >>> big_t['blog_tagline']
        u'...and the test goes on'
        >>> app.cfg['blog_tagline']
        iu'just another Zine blog'
        >>> app.cfg['language']
        u'en'
        >>> big_t.set_from_string('zine/posts_per_page', '42')
        >>> big_t.commit()


Was the transaction commited correctly?

        >>> app.cfg['zine/language']
        u'de'
        >>> app.cfg['blog_tagline']
        u'...and the test goes on'
        >>> app.cfg['posts_per_page']
        42


Handling of inexisting keys

        >>> app.cfg.change_single('inexisting_key', 23)
        Traceback (most recent call last):
        ...
        KeyError: 'inexisting_key'
        >>> app.cfg['inexisting_key']
        Traceback (most recent call last):
        ...
        KeyError: 'inexisting_key'


__contains__

        >>> 'zine/blog_title' in app.cfg
        True
        >>> 'foobar' in app.cfg
        False


Reset the config so future tests get the same initial values
        
        >>> reset = app.cfg.edit()
        >>> reset.revert_to_default('zine/blog_tagline')
        >>> reset.revert_to_default('posts_per_page')
        >>> reset.revert_to_default('language')
        >>> reset.commit()