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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 strategies as st
from hypothesis.internal.conjecture.data import ConjectureData
from hypothesis.strategies._internal.lazy import LazyStrategy
def test_labels_are_cached():
x = st.integers()
assert x.label is x.label
def test_labels_are_distinct():
assert st.integers().label != st.text().label
@st.composite
def foo(draw):
return draw(st.none())
@st.composite
def bar(draw):
return draw(st.none())
def test_different_composites_have_different_labels():
assert foo().label != bar().label
def test_one_of_label_is_distinct():
a = st.integers()
b = st.booleans()
assert st.one_of(a, b).label != st.one_of(b, a).label
def test_lists_label_by_element():
assert st.lists(st.integers()).label != st.lists(st.booleans()).label
def test_label_of_deferred_strategy_is_well_defined():
recursive = st.deferred(lambda: st.lists(recursive))
recursive.label
@pytest.mark.parametrize(
"strategy",
[
lambda: [st.none()],
lambda: [st.integers()],
lambda: [st.lists(st.floats())],
lambda: [st.none(), st.integers(), st.lists(st.floats())],
],
)
def test_sampled_from_label_with_strategies_does_not_change(strategy):
s1 = st.sampled_from(strategy())
s2 = st.sampled_from(strategy())
assert s1.label == s2.label
def test_label_of_enormous_sampled_range():
# this should not take forever.
st.sampled_from(range(2**30)).label
@pytest.mark.parametrize(
"strategy",
[
lambda: st.deferred(lambda: st.integers()),
lambda: LazyStrategy(st.integers, (), {}),
],
)
def test_draw_uses_wrapped_label(strategy):
cd = ConjectureData.for_choices([0])
strategy = strategy()
cd.draw(strategy)
cd.freeze()
assert len(cd.spans) == 2
assert cd.spans[1].label == st.integers().label
def test_deferred_label():
strategy = st.deferred(lambda: st.integers())
assert strategy.label != st.integers().label
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