def test_handles_builtins_in_expression(self):
self.assertTrue(
FeatureConstructorHandler().is_valid_item(
OWFeatureConstructor.descriptors,
StringDescriptor("X", "str(A) + str(B)"),
{"A": vartype(DiscreteVariable)},
{"B": vartype(DiscreteVariable)}
)
)
# no variables is also ok
self.assertTrue(
FeatureConstructorHandler().is_valid_item(
OWFeatureConstructor.descriptors,
StringDescriptor("X", "str('foo')"),
{},
{}
)
)
# should fail on unknown variables
self.assertFalse(
FeatureConstructorHandler().is_valid_item(
OWFeatureConstructor.descriptors,
StringDescriptor("X", "str(X)"),
{},
{}
)
)
def test_handles_special_characters_in_var_names(self):
self.assertTrue(
FeatureConstructorHandler().is_valid_item(
OWFeatureConstructor.descriptors,
StringDescriptor("X", "A_2_f"),
{"A.2 f": vartype(DiscreteVariable)},
{}
)
)