forked from pytest-dev/pytest
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathtest_error_diffs.py
274 lines (264 loc) · 7.76 KB
/
test_error_diffs.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
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
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
"""
Tests and examples for correct "+/-" usage in error diffs.
See https://github.com/pytest-dev/pytest/issues/3333 for details.
"""
import pytest
from _pytest.pytester import Pytester
TESTCASES = [
pytest.param(
"""
def test_this():
result = [1, 4, 3]
expected = [1, 2, 3]
assert result == expected
""",
"""
> assert result == expected
E assert [1, 4, 3] == [1, 2, 3]
E At index 1 diff: 4 != 2
E Full diff:
E - [1, 2, 3]
E ? ^
E + [1, 4, 3]
E ? ^
""",
id="Compare lists, one item differs",
),
pytest.param(
"""
def test_this():
result = [1, 2, 3]
expected = [1, 2]
assert result == expected
""",
"""
> assert result == expected
E assert [1, 2, 3] == [1, 2]
E Left contains one more item: 3
E Full diff:
E - [1, 2]
E + [1, 2, 3]
E ? +++
""",
id="Compare lists, one extra item",
),
pytest.param(
"""
def test_this():
result = [1, 3]
expected = [1, 2, 3]
assert result == expected
""",
"""
> assert result == expected
E assert [1, 3] == [1, 2, 3]
E At index 1 diff: 3 != 2
E Right contains one more item: 3
E Full diff:
E - [1, 2, 3]
E ? ---
E + [1, 3]
""",
id="Compare lists, one item missing",
),
pytest.param(
"""
def test_this():
result = (1, 4, 3)
expected = (1, 2, 3)
assert result == expected
""",
"""
> assert result == expected
E assert (1, 4, 3) == (1, 2, 3)
E At index 1 diff: 4 != 2
E Full diff:
E - (1, 2, 3)
E ? ^
E + (1, 4, 3)
E ? ^
""",
id="Compare tuples",
),
pytest.param(
"""
def test_this():
result = {1, 3, 4}
expected = {1, 2, 3}
assert result == expected
""",
"""
> assert result == expected
E assert {1, 3, 4} == {1, 2, 3}
E Extra items in the left set:
E 4
E Extra items in the right set:
E 2
E Full diff:
E - {1, 2, 3}
E ? ^ ^
E + {1, 3, 4}
E ? ^ ^
""",
id="Compare sets",
),
pytest.param(
"""
def test_this():
result = {1: 'spam', 3: 'eggs'}
expected = {1: 'spam', 2: 'eggs'}
assert result == expected
""",
"""
> assert result == expected
E AssertionError: assert {1: 'spam', 3: 'eggs'} == {1: 'spam', 2: 'eggs'}
E Common items:
E {1: 'spam'}
E Left contains 1 more item:
E {3: 'eggs'}
E Right contains 1 more item:
E {2: 'eggs'}
E Full diff:
E - {1: 'spam', 2: 'eggs'}
E ? ^
E + {1: 'spam', 3: 'eggs'}
E ? ^
""",
id="Compare dicts with differing keys",
),
pytest.param(
"""
def test_this():
result = {1: 'spam', 2: 'eggs'}
expected = {1: 'spam', 2: 'bacon'}
assert result == expected
""",
"""
> assert result == expected
E AssertionError: assert {1: 'spam', 2: 'eggs'} == {1: 'spam', 2: 'bacon'}
E Common items:
E {1: 'spam'}
E Differing items:
E {2: 'eggs'} != {2: 'bacon'}
E Full diff:
E - {1: 'spam', 2: 'bacon'}
E ? ^^^^^
E + {1: 'spam', 2: 'eggs'}
E ? ^^^^
""",
id="Compare dicts with differing values",
),
pytest.param(
"""
def test_this():
result = {1: 'spam', 2: 'eggs'}
expected = {1: 'spam', 3: 'bacon'}
assert result == expected
""",
"""
> assert result == expected
E AssertionError: assert {1: 'spam', 2: 'eggs'} == {1: 'spam', 3: 'bacon'}
E Common items:
E {1: 'spam'}
E Left contains 1 more item:
E {2: 'eggs'}
E Right contains 1 more item:
E {3: 'bacon'}
E Full diff:
E - {1: 'spam', 3: 'bacon'}
E ? ^ ^^^^^
E + {1: 'spam', 2: 'eggs'}
E ? ^ ^^^^
""",
id="Compare dicts with differing items",
),
pytest.param(
"""
def test_this():
result = "spmaeggs"
expected = "spameggs"
assert result == expected
""",
"""
> assert result == expected
E AssertionError: assert 'spmaeggs' == 'spameggs'
E - spameggs
E ? -
E + spmaeggs
E ? +
""",
id="Compare strings",
),
pytest.param(
"""
def test_this():
result = "spam bacon eggs"
assert "bacon" not in result
""",
"""
> assert "bacon" not in result
E AssertionError: assert 'bacon' not in 'spam bacon eggs'
E 'bacon' is contained here:
E spam bacon eggs
E ? +++++
""",
id='Test "not in" string',
),
pytest.param(
"""
from dataclasses import dataclass
@dataclass
class A:
a: int
b: str
def test_this():
result = A(1, 'spam')
expected = A(2, 'spam')
assert result == expected
""",
"""
> assert result == expected
E AssertionError: assert A(a=1, b='spam') == A(a=2, b='spam')
E Matching attributes:
E ['b']
E Differing attributes:
E ['a']
E Drill down into differing attribute a:
E a: 1 != 2
""",
id="Compare data classes",
),
pytest.param(
"""
import attr
@attr.s(auto_attribs=True)
class A:
a: int
b: str
def test_this():
result = A(1, 'spam')
expected = A(1, 'eggs')
assert result == expected
""",
"""
> assert result == expected
E AssertionError: assert A(a=1, b='spam') == A(a=1, b='eggs')
E Matching attributes:
E ['a']
E Differing attributes:
E ['b']
E Drill down into differing attribute b:
E b: 'spam' != 'eggs'
E - eggs
E + spam
""",
id="Compare attrs classes",
),
]
@pytest.mark.parametrize("code, expected", TESTCASES)
def test_error_diff(code: str, expected: str, pytester: Pytester) -> None:
expected_lines = [line.lstrip() for line in expected.splitlines()]
p = pytester.makepyfile(code)
result = pytester.runpytest(p, "-vv")
result.stdout.fnmatch_lines(expected_lines)
assert result.ret == 1