def test_observer_item_ordered_sequence_len(self):
# configure the model
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a",
array_field,
default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
# build the observer
length = 0
def len_changed(new_length: Observer.ItemValue) -> None:
nonlocal length
length = new_length
oo = Observer.ObserverBuilder()
oo.source(model).ordered_sequence_from_array("a").map(
oo.x.transform(lambda x: x.upper())).len().action_fn(len_changed)
with contextlib.closing(oo.make_observable()) as o:
# check the observer functionality
# items will be ordered
self.assertEqual(3, length)
model.a.insert(1, "a-b")
self.assertEqual(4, length)
del model.a[0]
self.assertEqual(3, length)
def test_refcounts_after_record_and_apply(self) -> None:
# create the model
x_field = StructuredModel.define_field("x", StructuredModel.INT)
y_field = StructuredModel.define_field("y", StructuredModel.INT)
record = StructuredModel.define_record("R", [x_field, y_field])
array = StructuredModel.define_array(record)
schema = StructuredModel.define_record("A", [StructuredModel.define_field("a", array)])
model = StructuredModel.build_model(schema, value={"a": [{"x": 1, "y": 2}, {"x": 3, "y": 4}]})
# create recorder
r = Recorder.Recorder(model)
# change the model
model_copy = copy.deepcopy(model)
model.a[1].x = 33
del model.a[0]
model.a.insert(1, StructuredModel.build_model(record, value={"x": -1, "y": -2}))
# confirm changes
self.assertEqual(33, model.a[0].x)
self.assertEqual(-2, model.a[1].y)
# confirm copy
self.assertEqual(1, model_copy.a[0].x)
self.assertEqual(4, model_copy.a[1].y)
r.apply(model_copy)
self.assertEqual(33, model_copy.a[0].x)
self.assertEqual(-2, model_copy.a[1].y)
# check recorder refcount
r_ref = weakref.ref(r)
del r
self.assertIsNone(r_ref())
def test_observer_item_sequence_for_each(self):
# configure the model
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a",
array_field,
default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
# build the observer
values = list()
class Action(Observer.AbstractAction):
def __init__(self, item_value):
nonlocal values
values.append(item_value)
def close(self):
pass
oo = Observer.ObserverBuilder()
oo.source(model).sequence_from_array("a").for_each(oo.x.action(Action))
with contextlib.closing(
typing.cast(Observer.AbstractItemSequenceSource,
oo.make_observable())) as o:
# check the observer functionality
# items will be unordered
self.assertEqual(["a", "b", "c"], values)
model.a.insert(1, "a-b")
self.assertEqual(["a", "b", "c", "a-b"], values)
def test_observer_item_sequence_filter(self):
# configure the model
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a",
array_field,
default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
# build the observer
oo = Observer.ObserverBuilder()
predicate = lambda x: not x.startswith("a")
oo.source(model).ordered_sequence_from_array("a").filter(predicate)
with contextlib.closing(
typing.cast(Observer.AbstractItemSequenceSource,
oo.make_observable())) as o:
# check the observer functionality
self.assertEqual(["b", "c"], o.items) # a, b, c
model.a.insert(1, "a-b")
self.assertEqual(["b", "c"], o.items) # a, a-b, b, c
model.a.insert(0, "b-a")
self.assertEqual(["b-a", "b", "c"], o.items) # b-a, a, a-b, b, c
del model.a[1]
self.assertEqual(["b-a", "b", "c"], o.items) # b-a, a-b, b, c
del model.a[2]
self.assertEqual(["b-a", "c"], o.items) # b-a, a-b, c
def test_change_array_records_value_generates_model_changed(self) -> None:
x_field = StructuredModel.define_field("x", StructuredModel.INT)
y_field = StructuredModel.define_field("y", StructuredModel.INT)
record = StructuredModel.define_record("A", [x_field, y_field])
schema = StructuredModel.define_array(record)
model = StructuredModel.build_model(schema,
value=[{
"x": 1,
"y": 2
}, {
"x": 3,
"y": 4
}])
changed_ref = [0]
def property_changed() -> None:
changed_ref[0] += 1
with contextlib.closing(
model.model_changed_event.listen(property_changed)):
self.assertEqual(0, changed_ref[0])
model.insert_item(
1, StructuredModel.build_model(record, value={
"x": 5,
"y": 6
}))
self.assertEqual(1, changed_ref[0])
model.items[1].x = 55
self.assertEqual(2, changed_ref[0])
def test_refcounts(self) -> None:
# create the model
x_field = StructuredModel.define_field("x", StructuredModel.INT)
y_field = StructuredModel.define_field("y", StructuredModel.INT)
record = StructuredModel.define_record("R", [x_field, y_field])
array = StructuredModel.define_array(record)
schema = StructuredModel.define_record(
"A", [StructuredModel.define_field("a", array)])
model = StructuredModel.build_model(
schema, value={"a": [{
"x": 1,
"y": 2
}, {
"x": 3,
"y": 4
}]})
# change the model
model.a[1].x = 33
del model.a[0]
model.a.insert(
1, StructuredModel.build_model(record, value={
"x": -1,
"y": -2
}))
# check ref counts
model_ref = weakref.ref(model)
del model
self.assertIsNone(model_ref())
def test_get_record_array_property(self) -> None:
# test that a record gives access to a array value directly through a property on the record
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a", array_field)
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
self.assertIsInstance(model.a, collections.abc.Sequence)
def __init__(self):
self._event_loop = None # this will be injected by declarative UI engine
# create a structured model by building a schema and then using the schema to create a structured model object.
mode_title_field = StructuredModel.define_field(
"title", StructuredModel.STRING)
mode_balance_field = StructuredModel.define_field("balance",
StructuredModel.INT,
default=0)
mode_schema = StructuredModel.define_record(
"Mode", [mode_title_field, mode_balance_field])
mode_index_field = StructuredModel.define_field("mode_index",
StructuredModel.INT,
default=1)
modes_field = StructuredModel.define_field(
"modes", StructuredModel.define_array(mode_schema))
schema = StructuredModel.define_record("Configuration",
[mode_index_field, modes_field])
# import pprint
# print(pprint.pformat(schema))
self.model = StructuredModel.build_model(schema)
# the title model is used for adding new modes. it is not part of the structured model.
self.title_model = Model.PropertyModel()
# the mode titles model is a property containing a list of mode titles. it is not part of the structured
# model, but needs to be rebuilt when the list of modes in the model changes. add a listener for items
# inserted/removed events and rebuild the mode titles model when those events are fired.
self.mode_titles_model = Model.PropertyModel(
[mode.title for mode in self.model.modes])
def modes_changed(k, v, i):
if k == "modes":
self.mode_titles_model.value = [
mode.title for mode in self.model.modes
]
self.__modes_item_inserted_listener = self.model.item_inserted_event.listen(
modes_changed)
self.__modes_item_removed_listener = self.model.item_removed_event.listen(
modes_changed)
# add some initial modes
self.model.modes.append(
StructuredModel.build_model(mode_schema, value={"title": "One"}))
self.model.modes.append(
StructuredModel.build_model(mode_schema, value={"title": "Two"}))
def test_setting_value_in_array_raises_exception(self) -> None:
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a",
array_field,
default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
with self.assertRaises(IndexError):
model.a[0] = "A"
def test_get_record_array_model(self) -> None:
# test that a record gives access to a array model through a property on the record with _model suffix
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a",
array_field,
default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
self.assertIsInstance(model.a_model, StructuredModel.ArrayModel)
def test_str_array_defaults(self) -> None:
# test that an array of simple fields (str) can be initialized with default values
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a",
array_field,
default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
self.assertSequenceEqual(["a", "b", "c"], model.a)
def test_record_with_array_defaults(self) -> None:
# test that a record with an array field can be initialized with default values
array_field = StructuredModel.define_field(
"a", StructuredModel.define_array(StructuredModel.INT))
record = StructuredModel.define_record("R", [array_field])
record_field = StructuredModel.define_field("r",
record,
default={"a": [3, 4, 5]})
schema = StructuredModel.define_record("Z", [record_field])
model = StructuredModel.build_model(schema)
self.assertEqual(3, len(model.r.a))
self.assertEqual(4, model.r.a[1])
self.assertEqual(5, model.r.a[2])
def test_refcounts(self) -> None:
# create the model
x_field = StructuredModel.define_field("x", StructuredModel.INT)
y_field = StructuredModel.define_field("y", StructuredModel.INT)
record = StructuredModel.define_record("R", [x_field, y_field])
array = StructuredModel.define_array(record)
schema = StructuredModel.define_record("A", [StructuredModel.define_field("a", array)])
model = StructuredModel.build_model(schema, value={"a": [{"x": 1, "y": 2}, {"x": 3, "y": 4}]})
# create recorder
r = Recorder.Recorder(model)
# check recorder refcount
r_ref = weakref.ref(r)
del r
self.assertIsNone(r_ref())
def test_change_array_basic_value_generates_model_changed(self) -> None:
schema = StructuredModel.define_array(StructuredModel.STRING)
model = StructuredModel.build_model(schema, value=["a", "b", "c"])
changed_ref = [0]
def property_changed() -> None:
changed_ref[0] += 1
with contextlib.closing(
model.model_changed_event.listen(property_changed)):
self.assertEqual(0, changed_ref[0])
model.insert_item(1, "aa")
self.assertEqual(1, changed_ref[0])
model.remove_item(1)
self.assertEqual(2, changed_ref[0])
def test_observer_item_array(self):
# configure the model
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a", array_field, default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
# build the observer
oo = Observer.ObserverBuilder()
oo.source(model).array("a")
with contextlib.closing(oo.make_observable()) as o:
# check the observer functionality
self.assertEqual(["a", "b", "c"], o.item)
model.a.insert(1, "a-b")
self.assertEqual(["a", "a-b", "b", "c"], o.item)
del model.a[2]
self.assertEqual(["a", "a-b", "c"], o.item)
def test_observer_item_sequence_index(self):
# configure the model
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a", array_field, default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
# build the observer
oo = Observer.ObserverBuilder()
oo.source(model).ordered_sequence_from_array("a").map(oo.x.transform(lambda x: x.upper())).index(0)
with contextlib.closing(oo.make_observable()) as o:
# check the observer functionality
# items will be ordered
self.assertEqual("A", o.item)
model.a.insert(1, "a-b")
self.assertEqual("A", o.item)
del model.a[0]
self.assertEqual("A-B", o.item)
def test_observer_item_array_sequence(self):
# configure the model
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a", array_field, default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
# build the observer
oo = Observer.ObserverBuilder()
oo.source(model).sequence_from_array("a")
with contextlib.closing(typing.cast(Observer.AbstractItemSequenceSource, oo.make_observable())) as o:
# check the observer functionality
# items will be unordered
self.assertEqual(["a", "b", "c"], o.items)
model.a.insert(1, "a-b")
self.assertEqual(["a", "b", "c", "a-b"], o.items)
del model.a[0]
self.assertEqual(["b", "c", "a-b"], o.items)
def test_array_of_records_defaults(self) -> None:
# test that an array of record fields can be initialized with default values
x_field = StructuredModel.define_field("x", StructuredModel.INT)
y_field = StructuredModel.define_field("y", StructuredModel.INT)
record = StructuredModel.define_record("A", [x_field, y_field])
array_field = StructuredModel.define_array(record)
str_field = StructuredModel.define_field("a",
array_field,
default=[{
"x": 1,
"y": 2
}, {
"x": 3,
"y": 4
}])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
self.assertEqual(2, len(model.a))
self.assertEqual(1, model.a[0].x)
self.assertEqual(4, model.a[1].y)
def test_removing_item_in_array_field_of_record_using_del_fires_item_removed_event(
self):
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a",
array_field,
default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
was_item_removed_ref = [False]
def handle_item_removed(key, value, before_index):
self.assertEqual("a", key)
self.assertEqual("b", value)
self.assertEqual(1, before_index)
was_item_removed_ref[0] = True
with contextlib.closing(
model.item_removed_event.listen(handle_item_removed)):
self.assertFalse(was_item_removed_ref[0])
del model.a[1]
self.assertTrue(was_item_removed_ref[0])
def test_inserting_item_in_array_field_of_record_using_insert_fires_item_inserted_event(
self) -> None:
array_field = StructuredModel.define_array(StructuredModel.STRING)
str_field = StructuredModel.define_field("a",
array_field,
default=["a", "b", "c"])
schema = StructuredModel.define_record("R", [str_field])
model = StructuredModel.build_model(schema)
was_item_inserted_ref = [False]
def handle_item_inserted(key: str, value: typing.Any,
before_index: int) -> None:
self.assertEqual("a", key)
self.assertEqual("bb", value)
self.assertEqual(1, before_index)
was_item_inserted_ref[0] = True
with contextlib.closing(
model.item_inserted_event.listen(handle_item_inserted)):
self.assertFalse(was_item_inserted_ref[0])
model.a.insert(1, "bb")
self.assertTrue(was_item_inserted_ref[0])
def test_copy_array_produces_copy(self) -> None:
x_field = StructuredModel.define_field("x", StructuredModel.INT)
y_field = StructuredModel.define_field("y", StructuredModel.INT)
record = StructuredModel.define_record("A", [x_field, y_field])
schema = StructuredModel.define_array(record)
model = StructuredModel.build_model(schema,
value=[{
"x": 1,
"y": 2
}, {
"x": 3,
"y": 4
}])
model_copy = copy.deepcopy(model)
self.assertEqual(len(model.items), len(model_copy.items))
self.assertEqual(model.items[1].x, model_copy.items[1].x)
self.assertEqual(model.items[1].y, model_copy.items[1].y)
model.items[1].x = 5
self.assertNotEqual(model.items[1].x, model_copy.items[1].x)
self.assertEqual(model.items[1].y, model_copy.items[1].y)
model.copy_from(model_copy)
self.assertEqual(len(model.items), len(model_copy.items))
self.assertEqual(model.items[1].x, model_copy.items[1].x)
self.assertEqual(model.items[1].y, model_copy.items[1].y)
