def test_extra_referrer_error(self, caplog: pytest.LogCaptureFixture) -> None:
d = Document()
dm = bdm.DocumentModuleManager(d)
mod = FakeMod()
assert 'FakeMod' not in sys.modules
dm.add(mod)
assert 'FakeMod' in sys.modules
assert len(dm) == 1
# add an extra referrer for Document.destroy to complain about
extra.append(mod)
import gc
# get_referrers behavior changed in Python 3.7, see https://github.com/bokeh/bokeh/issues/8221
assert len(gc.get_referrers(mod)) in (3,4)
with caplog.at_level(logging.ERROR):
dm.destroy()
assert "Module %r has extra unexpected referrers! This could indicate a serious memory leak. Extra referrers:" % mod in caplog.text
assert len(caplog.records) == 1
assert 'FakeMod' not in sys.modules
assert len(dm) ==0
def test_basic(self) -> None:
d = Document()
dm = bdm.DocumentModuleManager(d)
assert len(dm) == 0
# module manager should only hold a weak ref
assert len(gc.get_referrers(d)) == 0
def test_add_twice_error(self) -> None:
d = Document()
dm = bdm.DocumentModuleManager(d)
mod = FakeMod()
assert 'FakeMod' not in sys.modules
dm.add(mod)
with pytest.raises(RuntimeError):
dm.add(mod)
del sys.modules["FakeMod"]
def test_add(self) -> None:
d = Document()
dm = bdm.DocumentModuleManager(d)
mod = FakeMod()
assert 'FakeMod' not in sys.modules
dm.add(mod)
assert 'FakeMod' in sys.modules
assert len(dm) == 1
del sys.modules["FakeMod"]
