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
|
# This file is part of Hypothesis, which may be found at
# https://github.com/HypothesisWorks/hypothesis/
#
# Copyright the Hypothesis Authors.
# Individual contributors are listed in AUTHORS.rst and the git log.
#
# This Source Code Form is subject to the terms of the Mozilla Public License,
# v. 2.0. If a copy of the MPL was not distributed with this file, You can
# obtain one at https://mozilla.org/MPL/2.0/.
import pytest
from hypothesis import assume, given, reject, settings
from hypothesis.errors import InvalidArgument, Unsatisfiable
from hypothesis.strategies import booleans, integers, nothing
from tests.common.utils import fails_with
def test_raises_unsatisfiable_if_all_false_in_finite_set():
@given(booleans())
def test_assume_false(x):
reject()
with pytest.raises(Unsatisfiable):
test_assume_false()
def test_does_not_raise_unsatisfiable_if_some_false_in_finite_set():
@given(booleans())
def test_assume_x(x):
assume(x)
test_assume_x()
def test_raises_unsatisfiable_if_passed_explicit_nothing():
@given(x=nothing())
def test_never_runs(x):
raise Exception("Can't ever execute this")
with pytest.raises(
Unsatisfiable,
match=r"Cannot generate examples from empty strategy: x=nothing\(\)",
):
test_never_runs()
def test_error_if_has_no_hints():
@given(a=...)
def inner(a):
pass
with pytest.raises(InvalidArgument):
inner()
def test_error_if_infer_all_and_has_no_hints():
@given(...)
def inner(a):
pass
with pytest.raises(InvalidArgument):
inner()
def test_error_if_infer_is_posarg():
@given(..., ...)
def inner(ex1: int, ex2: int):
pass
with pytest.raises(InvalidArgument):
inner()
def test_error_if_infer_is_posarg_mixed_with_kwarg():
@given(..., ex2=...)
def inner(ex1: int, ex2: int):
pass
with pytest.raises(InvalidArgument):
inner()
def test_given_twice_is_an_error():
@settings(deadline=None)
@given(booleans())
@given(integers())
def inner(a, b):
pass
with pytest.raises(InvalidArgument):
inner()
@fails_with(InvalidArgument)
def test_given_is_not_a_class_decorator():
@given(integers())
class test_given_is_not_a_class_decorator:
def __init__(self, i):
pass
def test_specific_error_for_coroutine_functions():
@settings(database=None)
@given(booleans())
async def foo(x):
pass
with pytest.raises(
InvalidArgument,
match="Hypothesis doesn't know how to run async test functions",
):
foo()
|
