def test_update_with_obj():
begin_update_count = 0
def begin_update(domain):
nonlocal begin_update_count
begin_update_count += 1
end_update_count = 0
def end_update(domain):
nonlocal end_update_count
end_update_count += 1
f = Curve()
# Add and remove observer using object
obj = T()
f.add_observer(obj, begin=begin_update, end=end_update)
f.begin_update(Interval(1, 3))
assert begin_update_count == 1
f.end_update(Interval(1, 3))
assert end_update_count == 1
f.remove_observer(obj)
f.begin_update(Interval(1, 3))
assert begin_update_count == 1
f.end_update(Interval(1, 3))
assert end_update_count == 1
def test_func_update():
begin_update_count = 0
begin_update_interval = None
def begin_update(domain):
nonlocal begin_update_count
nonlocal begin_update_interval
begin_update_count += 1
begin_update_interval = domain
end_update_count = 0
end_update_interval = None
def end_update(domain):
nonlocal end_update_count
nonlocal end_update_interval
end_update_count += 1
end_update_interval = domain
f = Curve()
t = f.add_observer(domain=(0, 2), begin=begin_update, end=end_update)
f.begin_update(Interval(1, 3))
assert begin_update_count == 1
assert end_update_count == 0
assert begin_update_interval.start == 1
assert begin_update_interval.end == 3
f.end_update(Interval(1, 3))
assert begin_update_count == 1
assert end_update_count == 1
assert end_update_interval.start == 1
assert end_update_interval.end == 3
f.begin_update(Interval(3, 4))
assert begin_update_count == 1
assert end_update_count == 1
f.end_update(Interval(3, 4))
assert begin_update_count == 1
assert end_update_count == 1
f.remove_observer(t)
f.begin_update(Interval(1, 3))
assert begin_update_count == 1
assert end_update_count == 1
f.end_update(Interval(1, 3))
assert begin_update_count == 1
assert end_update_count == 1