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import pytest
from _pytest.stash import Stash
from _pytest.stash import StashKey
def test_stash() -> None:
stash = Stash()
assert len(stash) == 0
assert not stash
key1 = StashKey[str]()
key2 = StashKey[int]()
# Basic functionality - single key.
assert key1 not in stash
stash[key1] = "hello"
assert key1 in stash
assert stash[key1] == "hello"
assert stash.get(key1, None) == "hello"
stash[key1] = "world"
assert stash[key1] == "world"
# Has correct type (no mypy error).
stash[key1] + "string"
assert len(stash) == 1
assert stash
# No interaction with another key.
assert key2 not in stash
assert stash.get(key2, None) is None
with pytest.raises(KeyError):
stash[key2]
with pytest.raises(KeyError):
del stash[key2]
stash[key2] = 1
assert stash[key2] == 1
# Has correct type (no mypy error).
stash[key2] + 20
del stash[key1]
with pytest.raises(KeyError):
del stash[key1]
with pytest.raises(KeyError):
stash[key1]
# setdefault
stash[key1] = "existing"
assert stash.setdefault(key1, "default") == "existing"
assert stash[key1] == "existing"
key_setdefault = StashKey[bytes]()
assert stash.setdefault(key_setdefault, b"default") == b"default"
assert stash[key_setdefault] == b"default"
assert len(stash) == 3
assert stash
# Can't accidentally add attributes to stash object itself.
with pytest.raises(AttributeError):
stash.foo = "nope" # type: ignore[attr-defined]
# No interaction with another stash.
stash2 = Stash()
key3 = StashKey[int]()
assert key2 not in stash2
stash2[key2] = 100
stash2[key3] = 200
assert stash2[key2] + stash2[key3] == 300
assert stash[key2] == 1
assert key3 not in stash