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# -*- coding: utf-8 -*-
# Dioptas - GUI program for fast processing of 2D X-ray diffraction data
# Principal author: Clemens Prescher (clemens.prescher@gmail.com)
# Copyright (C) 2014-2019 GSECARS, University of Chicago, USA
# Copyright (C) 2015-2018 Institute for Geology and Mineralogy, University of Cologne, Germany
# Copyright (C) 2019-2020 DESY, Hamburg, Germany
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import gc
from xypattern.util.signal import Signal, WeakRefList
def test_weakreflist_with_objects():
weak_ref_list = WeakRefList()
class A(str):
pass
a = A()
weak_ref_list.append(a)
assert len(weak_ref_list) == 1
assert weak_ref_list[0]() == a
del a
gc.collect()
assert len(weak_ref_list) == 0
def test_weakreflist_with_bound_methods():
weak_ref_list = WeakRefList()
class A:
def method(self):
return "lala"
a = A()
weak_ref_list.append(a.method)
assert len(weak_ref_list) == 1
assert weak_ref_list[0]()() == "lala"
del a
gc.collect()
assert len(weak_ref_list) == 0
def test_weakreflist_with_insertion():
weak_ref_list = WeakRefList()
class A:
def method(self):
return "lala"
a = A()
weak_ref_list.insert(0, a.method)
assert len(weak_ref_list) == 1
assert weak_ref_list[0]()() == "lala"
del a
gc.collect()
assert len(weak_ref_list) == 0
def test_signal_with_sole_functions():
signal = Signal()
memory = []
def f():
memory.append(1)
signal.connect(f)
signal.emit()
assert memory == [1]
signal.disconnect(f)
signal.emit()
assert memory == [1]
def test_signal_with_bound_methods():
signal = Signal()
memory = []
class A:
def method(self):
memory.append(1)
a = A()
signal.connect(a.method)
signal.emit()
assert memory == [1]
signal.disconnect(a.method)
signal.emit()
assert memory == [1]
def test_signal_with_signal():
signal = Signal()
memory = []
signal2 = Signal()
def f():
memory.append(1)
signal.connect(f)
signal2.connect(signal)
signal2.emit()
assert memory == [1]
def test_signal_with_priority():
signal = Signal()
memory = []
def f():
memory.append(1)
def g():
memory.append(2)
signal.connect(f)
signal.connect(g, priority=True)
signal.emit()
assert memory == [2, 1]
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