Repository navigation
Expand file tree
/
Copy pathtest_type_annotations.py
More file actions
214 lines (193 loc) · 6.23 KB
/
Copy pathtest_type_annotations.py
File metadata and controls
214 lines (193 loc) · 6.23 KB
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
import textwrap
import unittest
from test.support import run_code
class TypeAnnotationTests(unittest.TestCase):
def test_lazy_create_annotations(self):
# type objects lazy create their __annotations__ dict on demand.
# the annotations dict is stored in type.__dict__.
# a freshly created type shouldn't have an annotations dict yet.
foo = type("Foo", (), {})
for i in range(3):
self.assertFalse("__annotations__" in foo.__dict__)
d = foo.__annotations__
self.assertTrue("__annotations__" in foo.__dict__)
self.assertEqual(foo.__annotations__, d)
self.assertEqual(foo.__dict__['__annotations__'], d)
del foo.__annotations__
def test_setting_annotations(self):
foo = type("Foo", (), {})
for i in range(3):
self.assertFalse("__annotations__" in foo.__dict__)
d = {'a': int}
foo.__annotations__ = d
self.assertTrue("__annotations__" in foo.__dict__)
self.assertEqual(foo.__annotations__, d)
self.assertEqual(foo.__dict__['__annotations__'], d)
del foo.__annotations__
def test_annotations_getset_raises(self):
# builtin types don't have __annotations__ (yet!)
with self.assertRaises(AttributeError):
print(float.__annotations__)
with self.assertRaises(TypeError):
float.__annotations__ = {}
with self.assertRaises(TypeError):
del float.__annotations__
# double delete
foo = type("Foo", (), {})
foo.__annotations__ = {}
del foo.__annotations__
with self.assertRaises(AttributeError):
del foo.__annotations__
def test_annotations_are_created_correctly(self):
class C:
a:int=3
b:str=4
self.assertTrue("__annotations__" in C.__dict__)
del C.__annotations__
self.assertFalse("__annotations__" in C.__dict__)
def test_descriptor_still_works(self):
class C:
def __init__(self, name=None, bases=None, d=None):
self.my_annotations = None
@property
def __annotations__(self):
if not hasattr(self, 'my_annotations'):
self.my_annotations = {}
if not isinstance(self.my_annotations, dict):
self.my_annotations = {}
return self.my_annotations
@__annotations__.setter
def __annotations__(self, value):
if not isinstance(value, dict):
raise ValueError("can only set __annotations__ to a dict")
self.my_annotations = value
@__annotations__.deleter
def __annotations__(self):
if getattr(self, 'my_annotations', False) is None:
raise AttributeError('__annotations__')
self.my_annotations = None
c = C()
self.assertEqual(c.__annotations__, {})
d = {'a':'int'}
c.__annotations__ = d
self.assertEqual(c.__annotations__, d)
with self.assertRaises(ValueError):
c.__annotations__ = 123
del c.__annotations__
with self.assertRaises(AttributeError):
del c.__annotations__
self.assertEqual(c.__annotations__, {})
class D(metaclass=C):
pass
self.assertEqual(D.__annotations__, {})
d = {'a':'int'}
D.__annotations__ = d
self.assertEqual(D.__annotations__, d)
with self.assertRaises(ValueError):
D.__annotations__ = 123
del D.__annotations__
with self.assertRaises(AttributeError):
del D.__annotations__
self.assertEqual(D.__annotations__, {})
class TestSetupAnnotations(unittest.TestCase):
def check(self, code: str):
code = textwrap.dedent(code)
for scope in ("module", "class"):
with self.subTest(scope=scope):
if scope == "class":
code = f"class C:\n{textwrap.indent(code, ' ')}"
ns = run_code(code)
if scope == "class":
annotations = ns["C"].__annotations__
else:
annotations = ns["__annotations__"]
self.assertEqual(annotations, {"x": int})
def test_top_level(self):
self.check("x: int = 1")
def test_blocks(self):
self.check("if True:\n x: int = 1")
self.check("""
while True:
x: int = 1
break
""")
self.check("""
while False:
pass
else:
x: int = 1
""")
self.check("""
for i in range(1):
x: int = 1
""")
self.check("""
for i in range(1):
pass
else:
x: int = 1
""")
def test_try(self):
self.check("""
try:
x: int = 1
except:
pass
""")
self.check("""
try:
pass
except:
pass
else:
x: int = 1
""")
self.check("""
try:
pass
except:
pass
finally:
x: int = 1
""")
self.check("""
try:
1/0
except:
x: int = 1
""")
def test_try_star(self):
self.check("""
try:
x: int = 1
except* Exception:
pass
""")
self.check("""
try:
pass
except* Exception:
pass
else:
x: int = 1
""")
self.check("""
try:
pass
except* Exception:
pass
finally:
x: int = 1
""")
self.check("""
try:
1/0
except* Exception:
x: int = 1
""")
def test_match(self):
self.check("""
match 0:
case 0:
x: int = 1
""")