def test_retrieving_existing_global_object(self):
objects = {
'bool': BoolVar(),
'traffic': TrafficLightVar(),
}
st = Namespace(objects)
requested_object = st.get_object("bool")
eq_(requested_object, BoolVar())
def test_retrieving_existing_global_object(self):
objects = {
'bool': BoolVar(),
'traffic': TrafficLightVar(),
}
st = Namespace(objects)
requested_object = st.get_object("bool")
eq_(requested_object, BoolVar())
def test_retrieving_existing_2nd_level_object(self):
sub_objects = {
'bool': BoolVar(),
'traffic': TrafficLightVar(),
}
global_objects = {
'foo': TrafficLightVar(),
}
sub_namespace = {'sub1': Namespace(sub_objects)}
st = Namespace(global_objects, sub_namespace)
requested_object = st.get_object("bool", ["sub1"])
eq_(requested_object, BoolVar())
def test_retrieving_existing_2nd_level_object(self):
sub_objects = {
'bool': BoolVar(),
'traffic': TrafficLightVar(),
}
global_objects = {
'foo': TrafficLightVar(),
}
sub_namespace = {'sub1': Namespace(sub_objects)}
st = Namespace(global_objects, sub_namespace)
requested_object = st.get_object("bool", ["sub1"])
eq_(requested_object, BoolVar())
class TestEvaluableParser(object):
"""Tests for the evaluable parser."""
global_objects = {
'bool': BoolVar(),
'message': String("Hello world"),
'foo': PermissiveFunction,
}
traffic_objects = {
'traffic_light': TrafficLightVar(),
'pedestrians_crossing_road': PedestriansCrossingRoad(),
'drivers_awaiting_green_light': DriversAwaitingGreenLightVar(),
'traffic_violation': TrafficViolationFunc,
}
root_namespace = Namespace(global_objects, {
'traffic': Namespace(traffic_objects),
})
parser = EvaluableParser(Grammar(), root_namespace)
#{ Tests for the parse action that makes the variables
def test_existing_variable_without_namespace(self):
parse_tree = self.parser("~ bool")
eq_(parse_tree.root_node, Not(self.global_objects['bool']))
def test_existing_variable_with_namespace(self):
parse_tree = self.parser('traffic:traffic_light == "green"')
expected_node = Equal(self.traffic_objects['traffic_light'],
String("green"))
eq_(parse_tree.root_node, expected_node)
def test_non_existing_variable_without_namespace(self):
assert_raises(ScopeError, self.parser, "~ non_existing_var")
def test_non_existing_variable_with_namespace(self):
assert_raises(ScopeError, self.parser, "~ traffic:non_existing_var")
def test_variable_in_non_existing_namespace(self):
assert_raises(ScopeError, self.parser, "~ bar:foo")
def test_function_instead_of_variable(self):
# "foo" is a function, so it cannot be used as a variable (without
# parenthesis):
try:
self.parser('~ foo')
except BadExpressionError, exc:
eq_('"foo" represents a function, not a variable', unicode(exc))
else:
def test_retrieving_non_existing_object(self):
global_objects = {
'foo': TrafficLightVar(),
'traffic-violation': TrafficViolationFunc(String("pedestrians")),
}
st = Namespace(global_objects, )
assert_raises(ScopeError, st.get_object, "bool")
def test_retrieving_object_in_non_existing_subtable(self):
global_objects = {
'foo': TrafficLightVar(),
'traffic-violation': TrafficViolationFunc(String("pedestrians")),
}
st = Namespace(global_objects, )
assert_raises(ScopeError, st.get_object, "foo", ["doesn't", "exist"])
def test_retrieving_existing_3rd_level_object(self):
third_level_objects = {
'bool': BoolVar(),
}
second_level_objects = {
'traffic': TrafficLightVar(),
}
global_objects = {
'foo': TrafficLightVar(),
'traffic-violation': TrafficViolationFunc(String("pedestrians")),
}
third_level_namespaces = {'sub2': Namespace(third_level_objects)}
second_level_namespaces = {
'sub1': Namespace(second_level_objects, third_level_namespaces)}
st = Namespace(global_objects, second_level_namespaces)
requested_object = st.get_object("bool", ["sub1", "sub2"])
eq_(requested_object, BoolVar())
def test_retrieving_existing_3rd_level_object(self):
third_level_objects = {
'bool': BoolVar(),
}
second_level_objects = {
'traffic': TrafficLightVar(),
}
global_objects = {
'foo': TrafficLightVar(),
'traffic-violation': TrafficViolationFunc(String("pedestrians")),
}
third_level_namespaces = {'sub2': Namespace(third_level_objects)}
second_level_namespaces = {
'sub1': Namespace(second_level_objects, third_level_namespaces)
}
st = Namespace(global_objects, second_level_namespaces)
requested_object = st.get_object("bool", ["sub1", "sub2"])
eq_(requested_object, BoolVar())
def test_subnamespaces_are_optional(self):
"""Namespaces may not have sub-namespaces."""
st = Namespace(objects={})
eq_(st.subnamespaces, {})