MatchesStructure doesn't work with dicts

[Julian Edwards]

MatchesStructure is one of my favourite matchers! However, it doesn't work if the matchee is a dict, like this:

        params = {"this": 1, "that": 2, "tother":3}
        user.this = 1
        user.that = 2
        user.tother = 3
        self.assertThat(
            params,
            MatchesStructure.fromExample(
                user, "this", "that", "tother"))

If it detected that "params" was a dict and DTRT, that would be awesome.

[Jonathan Lange (jml)]

Good thought!

[Jonathan Lange (jml)]

Workarounds:

1. Helper function for dict -> object

class _Object(object):
    def __init__(self, data):
        for name, value in data:
            setattr(self, name, value)

def dict_to_object(data):
    return _Object(data)

self.assertThat(
    dict_to_object(params),
    MatchesStructure.fromExample(user, 'this', 'that', 'tother'))

2. Helper function for object -> dict

def getattrs(obj, *keys):
    d = {}
    for key in keys:
        d[key] = getattr(obj, key)
    return d

self.assertThat(params, Equals(dict_to_object(user, 'this', 'that', 'tother')))