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
|
# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from typing import Any
import libcst as cst
from libcst import parse_expression
from libcst._nodes.tests.base import CSTNodeTest
from libcst.metadata import CodeRange
from libcst.testing.utils import data_provider
class DictCompTest(CSTNodeTest):
@data_provider(
[
# simple DictComp
{
"node": cst.DictComp(
cst.Name("k"),
cst.Name("v"),
cst.CompFor(target=cst.Name("a"), iter=cst.Name("b")),
),
"code": "{k: v for a in b}",
"parser": parse_expression,
"expected_position": CodeRange((1, 0), (1, 17)),
},
# non-trivial keys & values in DictComp
{
"node": cst.DictComp(
cst.BinaryOperation(cst.Name("k1"), cst.Add(), cst.Name("k2")),
cst.BinaryOperation(cst.Name("v1"), cst.Add(), cst.Name("v2")),
cst.CompFor(target=cst.Name("a"), iter=cst.Name("b")),
),
"code": "{k1 + k2: v1 + v2 for a in b}",
"parser": parse_expression,
"expected_position": CodeRange((1, 0), (1, 29)),
},
# custom whitespace around colon
{
"node": cst.DictComp(
cst.Name("k"),
cst.Name("v"),
cst.CompFor(target=cst.Name("a"), iter=cst.Name("b")),
whitespace_before_colon=cst.SimpleWhitespace("\t"),
whitespace_after_colon=cst.SimpleWhitespace("\t\t"),
),
"code": "{k\t:\t\tv for a in b}",
"parser": parse_expression,
"expected_position": CodeRange((1, 0), (1, 19)),
},
# custom whitespace inside braces
{
"node": cst.DictComp(
cst.Name("k"),
cst.Name("v"),
cst.CompFor(target=cst.Name("a"), iter=cst.Name("b")),
lbrace=cst.LeftCurlyBrace(
whitespace_after=cst.SimpleWhitespace("\t")
),
rbrace=cst.RightCurlyBrace(
whitespace_before=cst.SimpleWhitespace("\t\t")
),
),
"code": "{\tk: v for a in b\t\t}",
"parser": parse_expression,
"expected_position": CodeRange((1, 0), (1, 20)),
},
# parenthesis
{
"node": cst.DictComp(
cst.Name("k"),
cst.Name("v"),
cst.CompFor(target=cst.Name("a"), iter=cst.Name("b")),
lpar=[cst.LeftParen()],
rpar=[cst.RightParen()],
),
"code": "({k: v for a in b})",
"parser": parse_expression,
"expected_position": CodeRange((1, 1), (1, 18)),
},
# missing spaces around DictComp is always okay
{
"node": cst.DictComp(
cst.Name("a"),
cst.Name("b"),
cst.CompFor(
target=cst.Name("c"),
iter=cst.DictComp(
cst.Name("d"),
cst.Name("e"),
cst.CompFor(target=cst.Name("f"), iter=cst.Name("g")),
),
ifs=[
cst.CompIf(
cst.Name("h"),
whitespace_before=cst.SimpleWhitespace(""),
)
],
whitespace_after_in=cst.SimpleWhitespace(""),
),
),
"code": "{a: b for c in{d: e for f in g}if h}",
"parser": parse_expression,
"expected_position": CodeRange((1, 0), (1, 36)),
},
# no whitespace before `for` clause
{
"node": cst.DictComp(
cst.Name("k"),
cst.Name("v", lpar=[cst.LeftParen()], rpar=[cst.RightParen()]),
cst.CompFor(
target=cst.Name("a"),
iter=cst.Name("b"),
whitespace_before=cst.SimpleWhitespace(""),
),
),
"code": "{k: (v)for a in b}",
"parser": parse_expression,
"expected_position": CodeRange((1, 0), (1, 18)),
},
]
)
def test_valid(self, **kwargs: Any) -> None:
self.validate_node(**kwargs)
@data_provider(
[
# unbalanced DictComp
{
"get_node": lambda: cst.DictComp(
cst.Name("k"),
cst.Name("v"),
cst.CompFor(target=cst.Name("a"), iter=cst.Name("b")),
lpar=[cst.LeftParen()],
),
"expected_re": "left paren without right paren",
},
# invalid whitespace before for/async
{
"get_node": lambda: cst.DictComp(
cst.Name("k"),
cst.Name("v"),
cst.CompFor(
target=cst.Name("a"),
iter=cst.Name("b"),
whitespace_before=cst.SimpleWhitespace(""),
),
),
"expected_re": "Must have at least one space before 'for' keyword.",
},
{
"get_node": lambda: cst.DictComp(
cst.Name("k"),
cst.Name("v"),
cst.CompFor(
target=cst.Name("a"),
iter=cst.Name("b"),
asynchronous=cst.Asynchronous(),
whitespace_before=cst.SimpleWhitespace(""),
),
),
"expected_re": "Must have at least one space before 'async' keyword.",
},
]
)
def test_invalid(self, **kwargs: Any) -> None:
self.assert_invalid(**kwargs)
|
