-
Notifications
You must be signed in to change notification settings - Fork 340
/
multicollection.py
160 lines (128 loc) · 5.03 KB
/
multicollection.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
from .diff import diff
from collections import OrderedDict
import copy
import functools
from mongomock.helpers import RE_TYPE
_COMPARE_EXCEPTIONS = 'exceptions'
class MultiCollection(object):
def __init__(self, conns):
super(MultiCollection, self).__init__()
self.conns = conns.copy()
self.do = Foreach(self.conns, compare=False)
self.compare = Foreach(self.conns, compare=True)
self.compare_ignore_order = Foreach(
self.conns, compare=True, ignore_order=True)
self.compare_exceptions = Foreach(self.conns, compare=_COMPARE_EXCEPTIONS)
class Foreach(object):
def __init__(self, objs, compare, ignore_order=False,
method_result_decorators=()):
self.___objs = objs
self.___compare = compare
self.___ignore_order = ignore_order
self.___decorators = list(method_result_decorators)
self.___sort_by = None
def __getattr__(self, method_name):
return ForeachMethod(
self.___objs,
self.___compare,
self.___ignore_order,
method_name,
self.___decorators,
self.___sort_by)
def sort_by(self, fun):
self.___sort_by = fun
return self
def __call__(self, *decorators):
return Foreach(
self.___objs,
self.___compare,
self.___ignore_order,
self.___decorators + list(decorators))
class ForeachMethod(object):
def __init__(self, objs, compare, ignore_order, method_name, decorators, sort_by):
self.___objs = objs
self.___compare = compare
self.___ignore_order = ignore_order
self.___method_name = method_name
self.___decorators = decorators
self.___sort_by = sort_by
def _call(self, obj, args, kwargs):
# copying the args and kwargs is important, because pymongo changes
# the dicts (fits them with the _id)
return self.___apply_decorators(
getattr(obj, self.___method_name)(*_deepcopy(args), **_deepcopy(kwargs)))
def _get_exception_type(self, obj, args, kwargs, name):
try:
self._call(obj, args, kwargs)
assert False, 'No exception raised for ' + name
except Exception as err:
return type(err)
def __call__(self, *args, **kwargs):
if self.___compare == _COMPARE_EXCEPTIONS:
results = dict(
(name, self._get_exception_type(obj, args, kwargs, name=name))
for name, obj in self.___objs.items()
)
else:
results = dict(
(name, self._call(obj, args, kwargs))
for name, obj in self.___objs.items()
)
if self.___compare:
_assert_no_diff(results, ignore_order=self.___ignore_order, sort_by=self.___sort_by)
return results
def ___apply_decorators(self, obj):
for d in self.___decorators:
obj = d(obj)
return obj
def _assert_no_diff(results, ignore_order, sort_by):
if _result_is_cursor(results) or _result_is_command_cursor(results):
# If we were given a sort function, use that.
if sort_by is not None:
value_processor = functools.partial(_expand_cursor, sort=ignore_order, by=sort_by)
else:
value_processor = functools.partial(_expand_cursor, sort=ignore_order)
else:
assert not ignore_order
value_processor = None
prev_name = prev_value = None
for index, (name, value) in enumerate(results.items()):
if value_processor is not None:
value = value_processor(value)
if index > 0:
d = diff(prev_value, value)
assert not d, _format_diff_message(prev_name, name, d)
prev_name = name
prev_value = value
def _result_is_cursor(results):
return any(type(result).__name__ == 'Cursor' for result in results.values())
def _result_is_command_cursor(results):
return any(type(result).__name__ == 'CommandCursor'
for result in results.values())
def by_id(document):
return str(document.get('_id', str(document)))
def _expand_cursor(cursor, sort, by=by_id):
returned = [result.copy() for result in cursor]
if sort:
returned.sort(key=by)
for result in returned:
result.pop('_id', None)
return returned
def _format_diff_message(a_name, b_name, diff_list):
msg = 'Unexpected Diff:'
for (path, a_value, b_value) in diff_list:
a_path = [a_name] + path
b_path = [b_name] + path
msg += '\n\t{} != {} ({} != {})'.format(
'.'.join(map(str, a_path)), '.'.join(
map(str, b_path)), a_value, b_value)
return msg
def _deepcopy(x):
"""Deepcopy, but ignore regex objects..."""
if isinstance(x, RE_TYPE):
return x
if isinstance(x, list) or isinstance(x, tuple):
return type(x)(_deepcopy(y) for y in x)
if isinstance(x, (dict, OrderedDict)):
return type(x)((_deepcopy(k), _deepcopy(v)) for k, v in x.items())
return copy.deepcopy(x)