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
|
# 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 given, settings
from hypothesis.internal.conjecture.utils import integer_range
from hypothesis.strategies import integers
from hypothesis.strategies._internal.strategies import SearchStrategy
from tests.common.debug import minimal
class interval(SearchStrategy):
def __init__(self, lower, upper, center=None):
self.lower = lower
self.upper = upper
self.center = center
def do_draw(self, data):
return integer_range(data, self.lower, self.upper, center=self.center)
@pytest.mark.parametrize(
"lower_center_upper",
[(0, 5, 10), (-10, 10, 10), (0, 1, 1), (1, 1, 2), (-10, 0, 10), (-10, 5, 10)],
ids=repr,
)
def test_intervals_shrink_to_center(lower_center_upper):
lower, center, upper = lower_center_upper
s = interval(lower, upper, center)
assert minimal(s, lambda x: True) == center
if lower < center:
assert minimal(s, lambda x: x < center) == center - 1
if center < upper:
assert minimal(s, lambda x: x > center) == center + 1
assert minimal(s, lambda x: x != center) == center + 1
def test_bounded_integers_distribution_of_bit_width_issue_1387_regression():
values = []
@settings(database=None, max_examples=1000)
@given(integers(0, 1e100))
def test(x):
if 2 <= x <= int(1e100) - 2: # skip forced-endpoints
values.append(x)
test()
# We draw from a shaped distribution up to 128bit ~7/8 of the time, and
# uniformly the rest. So we should get some very large but not too many.
huge = sum(x > 1e97 for x in values)
assert huge != 0 or len(values) < 800
assert huge <= 0.3 * len(values) # expected ~1/8
|
