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
|
import datetime
import pickle
import pytest
from pyrsistent import CheckedPVector, InvariantException, optional, CheckedValueTypeError, PVector
class Naturals(CheckedPVector):
__type__ = int
__invariant__ = lambda value: (value >= 0, 'Negative value')
def test_instantiate():
x = Naturals([1, 2, 3])
assert list(x) == [1, 2, 3]
assert isinstance(x, Naturals)
assert isinstance(x, PVector)
def test_append():
x = Naturals()
x2 = x.append(1)
assert list(x2) == [1]
assert isinstance(x2, Naturals)
def test_extend():
x = Naturals()
x2 = x.extend([1])
assert list(x2) == [1]
assert isinstance(x2, Naturals)
def test_set():
x = Naturals([1, 2])
x2 = x.set(1, 3)
assert list(x2) == [1, 3]
assert isinstance(x2, Naturals)
def test_invalid_type():
try:
Naturals([1, 2.0])
assert False
except CheckedValueTypeError as e:
assert e.expected_types == (int,)
assert e.actual_type is float
assert e.actual_value == 2.0
assert e.source_class is Naturals
x = Naturals([1, 2])
with pytest.raises(TypeError):
x.append(3.0)
with pytest.raises(TypeError):
x.extend([3, 4.0])
with pytest.raises(TypeError):
x.set(1, 2.0)
with pytest.raises(TypeError):
x.evolver()[1] = 2.0
def test_breaking_invariant():
try:
Naturals([1, -1])
assert False
except InvariantException as e:
assert e.invariant_errors == ('Negative value',)
x = Naturals([1, 2])
try:
x.append(-1)
assert False
except InvariantException as e:
assert e.invariant_errors == ('Negative value',)
try:
x.extend([-1])
assert False
except InvariantException as e:
assert e.invariant_errors == ('Negative value',)
try:
x.set(1, -1)
assert False
except InvariantException as e:
assert e.invariant_errors == ('Negative value',)
def test_create_base_case():
x = Naturals.create([1, 2, 3])
assert isinstance(x, Naturals)
assert x == Naturals([1, 2, 3])
def test_create_with_instance_of_checked_pvector_returns_the_argument():
x = Naturals([1, 2, 3])
assert Naturals.create(x) is x
class OptionalNaturals(CheckedPVector):
__type__ = optional(int)
__invariant__ = lambda value: (value is None or value >= 0, 'Negative value')
def test_multiple_allowed_types():
assert list(OptionalNaturals([1, None, 3])) == [1, None, 3]
class NaturalsVector(CheckedPVector):
__type__ = optional(Naturals)
def test_create_of_nested_structure():
assert NaturalsVector([Naturals([1, 2]), Naturals([3, 4]), None]) ==\
NaturalsVector.create([[1, 2], [3, 4], None])
def test_serialize_default_case():
v = CheckedPVector([1, 2, 3])
assert v.serialize() == [1, 2, 3]
class Dates(CheckedPVector):
__type__ = datetime.date
@staticmethod
def __serializer__(format, d):
return d.strftime(format)
def test_serialize_custom_serializer():
d = datetime.date
v = Dates([d(2015, 2, 2), d(2015, 2, 3)])
assert v.serialize(format='%Y-%m-%d') == ['2015-02-02', '2015-02-03']
def test_type_information_is_inherited():
class MultiDates(Dates):
__type__ = int
MultiDates([datetime.date(2015, 2, 4), 5])
with pytest.raises(TypeError):
MultiDates([5.0])
def test_invariants_are_inherited():
class LimitNaturals(Naturals):
__invariant__ = lambda value: (value < 10, 'Too big')
try:
LimitNaturals([10, -1])
assert False
except InvariantException as e:
assert e.invariant_errors == ('Too big', 'Negative value')
def test_invariant_must_be_callable():
with pytest.raises(TypeError):
class InvalidInvariant(CheckedPVector):
__invariant__ = 1
def test_type_spec_must_be_type():
with pytest.raises(TypeError):
class InvalidType(CheckedPVector):
__type__ = 1
def test_repr():
x = Naturals([1, 2])
assert str(x) == 'Naturals([1, 2])'
def test_evolver_returns_same_instance_when_no_updates():
x = Naturals([1, 2])
assert x.evolver().persistent() is x
def test_pickling():
x = Naturals([1, 2])
y = pickle.loads(pickle.dumps(x, -1))
assert x == y
assert isinstance(y, Naturals)
def test_multiple_optional_types():
class Numbers(CheckedPVector):
__type__ = optional(int, float)
numbers = Numbers([1, 2.5, None])
assert numbers.serialize() == [1, 2.5, None]
with pytest.raises(TypeError):
numbers.append('foo')
class NaturalsVectorStr(CheckedPVector):
__type__ = '__tests__.checked_vector_test.Naturals'
def test_check_with_string_specification():
naturals_list = [Naturals([1, 2]), Naturals([3, 4])]
nv = NaturalsVectorStr(naturals_list)
assert nv == naturals_list
def test_create_with_string_specification():
naturals_list = [[1, 2], [3, 4]]
nv = NaturalsVectorStr.create(naturals_list)
assert nv == naturals_list
def test_supports_weakref():
import weakref
weakref.ref(Naturals([]))
def test_create_with_generator_iterator():
# See issue #97
class Numbers(CheckedPVector):
__type__ = int
n = Numbers(i for i in [1, 2, 3])
assert n == Numbers([1, 2, 3])
|
