def test_parse_square_bracket(self):
text = "[foo, bar]"
parser = traits_listener.ListenerParser(text=text)
listener_group = parser.listener
# then
common_traits = dict(
metadata_name="",
metadata_defined=True,
is_any_trait=False,
dispatch="",
notify=True,
is_list_handler=False,
type=traits_listener.ANY_LISTENER,
next=None,
)
expected_items = [
traits_listener.ListenerItem(
name="foo",
**common_traits,
),
traits_listener.ListenerItem(
name="bar",
**common_traits,
)
]
self.assertEqual(len(listener_group.items), len(expected_items))
for actual, expected in zip(listener_group.items, expected_items):
self.assertEqual(actual, expected)
def test_parse_question_mark_only(self):
text = "?"
with self.assertRaises(TraitError) as exception_context:
traits_listener.ListenerParser(text=text)
self.assertIn("Expected non-empty name",
str(exception_context.exception))
def test_parse_comma_separated_text(self):
text = "child1, child2, child3"
parser = traits_listener.ListenerParser(text=text)
listener_group = parser.listener
common_traits = dict(
metadata_name="",
metadata_defined=True,
is_any_trait=False,
dispatch="",
notify=True,
is_list_handler=False,
type=traits_listener.ANY_LISTENER,
next=None,
)
expected_items = [
traits_listener.ListenerItem(
name="child1",
**common_traits,
),
traits_listener.ListenerItem(
name="child2",
**common_traits,
),
traits_listener.ListenerItem(
name="child3",
**common_traits,
),
]
self.assertEqual(len(listener_group.items), len(expected_items))
for actual, expected in zip(listener_group.items, expected_items):
self.assertEqual(actual, expected)
def test_listener_parser_trait_of_trait_of_trait_mixed(self):
text = "parent.child1:child2"
parser = traits_listener.ListenerParser(text=text)
# then
common_traits = dict(
metadata_name="",
metadata_defined=True,
is_any_trait=False,
dispatch="",
is_list_handler=False,
type=traits_listener.ANY_LISTENER,
)
expected_child2 = traits_listener.ListenerItem(name="child2",
notify=True,
next=None,
**common_traits)
expected_child1 = traits_listener.ListenerItem(
name="child1",
notify=False, # ':' indicates no notifications
next=expected_child2,
**common_traits)
expected_parent = traits_listener.ListenerItem(name="parent",
notify=True,
next=expected_child1,
**common_traits)
self.assertEqual(parser.listener, expected_parent)
def test_parse_text_with_question_mark(self):
text = "foo?.bar?"
parser = traits_listener.ListenerParser(text=text)
# parent
listener = parser.listener
self.assertEqual(listener.name, "foo?")
# child
listener = listener.next
self.assertEqual(listener.name, "bar?")
def test_listener_parser_single_string(self):
text = "some_trait_name"
parser = traits_listener.ListenerParser(text=text)
expected = traits_listener.ListenerItem(
name="some_trait_name",
metadata_name="",
metadata_defined=True,
is_any_trait=False,
dispatch="",
notify=True,
is_list_handler=False,
type=traits_listener.ANY_LISTENER,
next=None,
)
self.assertEqual(parser.listener, expected)
def test_parse_is_list_handler(self):
text = "foo[]"
parser = traits_listener.ListenerParser(text=text)
expected = traits_listener.ListenerItem(
name="foo",
metadata_name="",
metadata_defined=True,
is_any_trait=False,
dispatch="",
notify=True,
is_list_handler=True, # the effect of '[]'
type=traits_listener.ANY_LISTENER,
next=None,
)
self.assertEqual(parser.listener, expected)
def test_parse_nested_exclude_empty_metadata_name(self):
text = "foo-"
parser = traits_listener.ListenerParser(text=text)
expected = traits_listener.ListenerItem(
name="foo*",
metadata_name="",
metadata_defined=False, # the effect of '-'
is_any_trait=False,
dispatch="",
notify=True,
is_list_handler=False,
type=traits_listener.ANY_LISTENER,
next=None,
)
self.assertEqual(parser.listener, expected)
def test_parse_text_with_metadata(self):
text = "prefix+foo"
parser = traits_listener.ListenerParser(text=text)
expected = traits_listener.ListenerItem(
name="prefix*",
metadata_name="foo",
metadata_defined=True,
is_any_trait=False,
dispatch="",
notify=True,
is_list_handler=False,
type=traits_listener.ANY_LISTENER,
next=None,
)
self.assertEqual(parser.listener, expected)
def test_parse_with_asterisk(self):
text = "prefix*"
parser = traits_listener.ListenerParser(text=text)
actual = parser.listener
expected = traits_listener.ListenerItem(
name="prefix",
metadata_name="",
metadata_defined=True,
is_any_trait=False,
dispatch="",
notify=True,
is_list_handler=False,
type=traits_listener.ANY_LISTENER,
# next is the ListenItem itself (so it is recursive)
next=actual,
)
self.assertEqual(actual, expected)
def test_listener_parser_trait_of_trait_dot(self):
text = "parent.child"
parser = traits_listener.ListenerParser(text=text)
# then
common_traits = dict(
metadata_name="",
metadata_defined=True,
is_any_trait=False,
dispatch="",
notify=True,
is_list_handler=False,
type=traits_listener.ANY_LISTENER,
)
expected_child = traits_listener.ListenerItem(name="child",
next=None,
**common_traits)
expected_parent = traits_listener.ListenerItem(name="parent",
next=expected_child,
**common_traits)
self.assertEqual(parser.listener, expected_parent)
def test_parse_square_bracket_in_middle(self):
text = "foo.[bar, baz]"
parser = traits_listener.ListenerParser(text=text)
actual_foo = parser.listener
# next is a ListenerGroup, and is checked separately
actual_next = actual_foo.next
actual_foo.next = None
common_traits = dict(metadata_name="",
metadata_defined=True,
is_any_trait=False,
dispatch="",
notify=True,
is_list_handler=False,
type=traits_listener.ANY_LISTENER,
next=None)
expected_foo = traits_listener.ListenerItem(
name="foo",
**common_traits,
)
self.assertEqual(actual_foo, expected_foo)
# Next listener is a ListenerGroup
expected_items = [
traits_listener.ListenerItem(
name="bar",
**common_traits,
),
traits_listener.ListenerItem(
name="baz",
**common_traits,
),
]
self.assertEqual(len(actual_next.items), len(expected_items))
for actual, expected in zip(actual_next.items, expected_items):
self.assertEqual(actual, expected)
def test_parse_comma_separated_text_trailing_comma(self):
# Made illegal, see enthought/traits#406
text = "child1, child2, child3,"
with self.assertRaises(TraitError):
traits_listener.ListenerParser(text=text)
