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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
from dataclasses import dataclass
from enum import Enum
from typing import Optional, List, Union
import pytest
from dacite import (
from_dict,
Config,
ForwardReferenceError,
UnexpectedDataError,
StrictUnionMatchError,
)
def test_from_dict_with_type_hooks():
@dataclass
class X:
s: str
result = from_dict(X, {"s": "TEST"}, Config(type_hooks={str: str.lower}))
assert result == X(s="test")
def test_from_dict_with_type_hooks_and_optional():
@dataclass
class X:
s: Optional[str]
result = from_dict(X, {"s": "TEST"}, Config(type_hooks={str: str.lower}))
assert result == X(s="test")
def test_from_dict_with_type_hooks_and_optional_null_value():
@dataclass
class X:
s: Optional[str]
result = from_dict(X, {"s": None}, Config(type_hooks={str: str.lower}))
assert result == X(s=None)
def test_from_dict_with_type_hooks_and_union():
@dataclass
class X:
s: Union[str, int]
result = from_dict(X, {"s": "TEST"}, Config(type_hooks={str: str.lower}))
assert result == X(s="test")
def test_from_dict_with_cast():
@dataclass
class X:
s: str
result = from_dict(X, {"s": 1}, Config(cast=[str]))
assert result == X(s="1")
def test_from_dict_with_base_class_cast():
class E(Enum):
A = "a"
@dataclass
class X:
e: E
result = from_dict(X, {"e": "a"}, Config(cast=[Enum]))
assert result == X(e=E.A)
def test_from_dict_with_base_class_cast_and_optional():
class E(Enum):
A = "a"
@dataclass
class X:
e: Optional[E]
result = from_dict(X, {"e": "a"}, Config(cast=[Enum]))
assert result == X(e=E.A)
def test_from_dict_with_cast_and_generic_collection():
@dataclass
class X:
s: List[int]
result = from_dict(X, {"s": (1,)}, Config(cast=[List]))
assert result == X(s=[1])
def test_from_dict_with_type_hooks_and_generic_sequence():
@dataclass
class X:
c: List[str]
result = from_dict(X, {"c": ["TEST"]}, config=Config(type_hooks={str: str.lower}))
assert result == X(c=["test"])
def test_from_dict_with_type_hook_exception():
@dataclass
class X:
i: int
def raise_error(_):
raise KeyError()
with pytest.raises(KeyError):
from_dict(X, {"i": 1}, config=Config(type_hooks={int: raise_error}))
def test_from_dict_with_forward_reference():
@dataclass
class X:
y: "Y"
@dataclass
class Y:
s: str
data = from_dict(X, {"y": {"s": "text"}}, Config(forward_references={"Y": Y}))
assert data == X(Y("text"))
def test_from_dict_with_missing_forward_reference():
@dataclass
class X:
y: "Y"
@dataclass
class Y:
s: str
with pytest.raises(ForwardReferenceError) as exception_info:
from_dict(X, {"y": {"s": "text"}})
assert str(exception_info.value) == "can not resolve forward reference: name 'Y' is not defined"
assert exception_info._excinfo[1].__suppress_context__
def test_form_dict_with_disabled_type_checking():
@dataclass
class X:
i: int
result = from_dict(X, {"i": "test"}, config=Config(check_types=False))
# noinspection PyTypeChecker
assert result == X(i="test")
def test_form_dict_with_disabled_type_checking_and_union():
@dataclass
class X:
i: Union[int, float]
result = from_dict(X, {"i": "test"}, config=Config(check_types=False))
# noinspection PyTypeChecker
assert result == X(i="test")
def test_from_dict_with_strict():
@dataclass
class X:
s: str
with pytest.raises(UnexpectedDataError) as exception_info:
from_dict(X, {"s": "test", "i": 1}, Config(strict=True))
assert str(exception_info.value) == 'can not match "i" to any data class field'
def test_from_dict_with_strict_unions_match_and_ambiguous_match():
@dataclass
class X:
i: int
@dataclass
class Y:
i: int
@dataclass
class Z:
u: Union[X, Y]
data = {
"u": {"i": 1},
}
with pytest.raises(StrictUnionMatchError) as exception_info:
from_dict(Z, data, Config(strict_unions_match=True))
assert str(exception_info.value) == 'can not choose between possible Union matches for field "u": X, Y'
def test_from_dict_with_strict_unions_match_and_single_match():
@dataclass
class X:
f: str
@dataclass
class Y:
f: int
@dataclass
class Z:
u: Union[X, Y]
data = {
"u": {"f": 1},
}
result = from_dict(Z, data, Config(strict_unions_match=True))
assert result == Z(u=Y(f=1))
|
