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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 functools
from collections import namedtuple
import pytest
from hypothesis.errors import InvalidArgument
from hypothesis.internal.conjecture.data import ConjectureData
from hypothesis.strategies import booleans, integers, just, none, tuples
from tests.common.debug import assert_no_examples
def test_or_errors_when_given_non_strategy():
bools = tuples(booleans())
with pytest.raises(ValueError):
bools | "foo"
SomeNamedTuple = namedtuple("SomeNamedTuple", ("a", "b"))
def last(xs):
t = None
for x in xs:
t = x
return t
def test_just_strategy_uses_repr():
class WeirdRepr:
def __repr__(self):
return "ABCDEFG"
assert repr(just(WeirdRepr())) == f"just({WeirdRepr()!r})"
def test_just_strategy_does_not_draw():
data = ConjectureData.for_buffer(b"")
s = just("hello")
assert s.do_draw(data) == "hello"
def test_none_strategy_does_not_draw():
data = ConjectureData.for_buffer(b"")
s = none()
assert s.do_draw(data) is None
def test_can_map():
s = integers().map(pack=lambda t: "foo")
assert s.example() == "foo"
def test_example_raises_unsatisfiable_when_too_filtered():
assert_no_examples(integers().filter(lambda x: False))
def nameless_const(x):
def f(u, v):
return u
return functools.partial(f, x)
def test_can_map_nameless():
f = nameless_const(2)
assert repr(f) in repr(integers().map(f))
def test_can_flatmap_nameless():
f = nameless_const(just(3))
assert repr(f) in repr(integers().flatmap(f))
def test_flatmap_with_invalid_expand():
with pytest.raises(InvalidArgument):
just(100).flatmap(lambda n: "a").example()
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