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# coding=utf-8
#
# This file is part of Hypothesis, which may be found at
# https://github.com/HypothesisWorks/hypothesis-python
#
# Most of this work is copyright (C) 2013-2016 David R. MacIver
# (david@drmaciver.com), but it contains contributions by others. See
# CONTRIBUTING.rst for a full list of people who may hold copyright, and
# consult the git log if you need to determine who owns an individual
# contribution.
#
# 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 http://mozilla.org/MPL/2.0/.
#
# END HEADER
from __future__ import division, print_function, absolute_import
import pytest
from hypothesis import strategies as st
from hypothesis import find, given, reporting
from hypothesis.errors import InvalidArgument
from tests.common.utils import raises, capture_out
@given(st.integers(), st.data())
def test_conditional_draw(x, data):
y = data.draw(st.integers(min_value=x))
assert y >= x
def test_prints_on_failure():
@given(st.data())
def test(data):
x = data.draw(st.lists(st.integers(), min_size=1))
y = data.draw(st.sampled_from(x))
assert y in x
x.remove(y)
assert y not in x
with raises(AssertionError):
with capture_out() as out:
with reporting.with_reporter(reporting.default):
test()
result = out.getvalue()
assert 'Draw 1: [0, 0]' in result
assert 'Draw 2: 0' in result
def test_given_twice_is_same():
@given(st.data(), st.data())
def test(data1, data2):
data1.draw(st.integers())
data2.draw(st.integers())
assert False
with raises(AssertionError):
with capture_out() as out:
with reporting.with_reporter(reporting.default):
test()
result = out.getvalue()
assert 'Draw 1: 0' in result
assert 'Draw 2: 0' in result
def test_errors_when_used_in_find():
with raises(InvalidArgument):
find(st.data(), lambda x: x.draw(st.booleans()))
@pytest.mark.parametrize('f', [
'filter', 'map', 'flatmap',
])
def test_errors_when_normal_strategy_functions_are_used(f):
with raises(InvalidArgument):
getattr(st.data(), f)(lambda x: 1)
def test_errors_when_asked_for_example():
with raises(InvalidArgument):
st.data().example()
def test_nice_repr():
assert repr(st.data()) == 'data()'
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