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import gc
import sys
from typing import Callable, Type
import pytest
IMPLEMENTATION = getattr(sys, "implementation") # to suppress mypy error
def test_ctor(case_insensitive_str_class: Type[str]) -> None:
s = case_insensitive_str_class()
assert "" == s
def test_ctor_str(case_insensitive_str_class: Type[str]) -> None:
s = case_insensitive_str_class("aBcD")
assert "aBcD" == s
def test_ctor_istr(case_insensitive_str_class: Type[str]) -> None:
s = case_insensitive_str_class("A")
s2 = case_insensitive_str_class(s)
assert "A" == s
assert s == s2
def test_ctor_buffer(case_insensitive_str_class: Type[str]) -> None:
s = case_insensitive_str_class(b"aBc")
assert "b'aBc'" == s
def test_ctor_repr(case_insensitive_str_class: Type[str]) -> None:
s = case_insensitive_str_class(None)
assert "None" == s
def test_str(case_insensitive_str_class: Type[str]) -> None:
s = case_insensitive_str_class("aBcD")
s1 = str(s)
assert s1 == "aBcD"
assert type(s1) is str
def test_eq(case_insensitive_str_class: Type[str]) -> None:
s1 = "Abc"
s2 = case_insensitive_str_class(s1)
assert s1 == s2
@pytest.fixture
def create_istrs(case_insensitive_str_class: Type[str]) -> Callable[[], None]:
"""Make a callable populating memory with a few ``istr`` objects."""
def _create_strs() -> None:
case_insensitive_str_class("foobarbaz")
istr2 = case_insensitive_str_class()
case_insensitive_str_class(istr2)
return _create_strs
@pytest.mark.skipif(
IMPLEMENTATION.name != "cpython",
reason="PyPy has different GC implementation",
)
def test_leak(create_istrs: Callable[[], None]) -> None:
gc.collect()
cnt = len(gc.get_objects())
for _ in range(10000):
create_istrs()
gc.collect()
cnt2 = len(gc.get_objects())
assert abs(cnt - cnt2) < 10 # on PyPy these numbers are not equal
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