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# 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 find, given, strategies as st
from hypothesis.errors import InvalidArgument
from hypothesis.strategies._internal.core import defines_strategy
def test_does_not_error_on_initial_calculation():
st.floats(max_value=float("nan"))
st.sampled_from([])
st.lists(st.integers(), min_size=5, max_size=2)
st.floats(min_value=2.0, max_value=1.0)
def test_errors_each_time():
s = st.integers(max_value=1, min_value=3)
with pytest.raises(InvalidArgument):
s.example()
with pytest.raises(InvalidArgument):
s.example()
def test_errors_on_test_invocation():
@given(st.integers(max_value=1, min_value=3))
def test(x):
pass
with pytest.raises(InvalidArgument):
test()
def test_errors_on_find():
s = st.lists(st.integers(), min_size=5, max_size=2)
with pytest.raises(InvalidArgument):
find(s, lambda x: True)
def test_errors_on_example():
s = st.floats(min_value=2.0, max_value=1.0)
with pytest.raises(InvalidArgument):
s.example()
def test_does_not_recalculate_the_strategy():
calls = [0]
@defines_strategy()
def foo():
calls[0] += 1
return st.just(1)
f = foo()
assert calls == [0]
f.example()
assert calls == [1]
f.example()
assert calls == [1]
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