def test_can_handle_recursive_types(self):
obj_1 = GraphQLObjectType("Object", fields=lambda: {"self": GraphQLField(type=obj_1)})
obj_2 = GraphQLObjectType("Object", fields=lambda: {"self": GraphQLField(type=obj_2)})
assert is_subtype(obj_1, obj_2)
obj_1 = GraphQLObjectType("Object", fields=lambda: {"self": GraphQLField(type=obj_1)})
obj_2 = GraphQLObjectType("Object", fields=lambda: {"self": GraphQLField(type=GraphQLNonNull(obj_2))})
assert not is_subtype(obj_1, obj_2)
def _assert_merge(self, types, expected_type):
merged = _common_supertype(*types)
assert_that(merged, expected_type)
assert_that(_common_supertype(*list(reversed(types))), expected_type)
for type_ in types:
assert is_subtype(type_, merged)
def _assert_merge(self, types, expected_type):
merged = greatest_common_subtype(types)
assert_that(merged, expected_type)
assert_that(greatest_common_subtype(list(reversed(types))), expected_type)
for type_ in types:
assert is_subtype(merged, type_)
def test_when_query_is_not_subtype_then_schema_is_not_subtype(self):
assert not is_subtype(
GraphQLSchema(
query=GraphQLObjectType("Object", fields={
"id": GraphQLField(type=GraphQLInt),
}),
),
GraphQLSchema(
query=GraphQLObjectType("Object", fields={
"id": GraphQLField(type=GraphQLInt),
"name": GraphQLField(type=GraphQLString),
}),
),
)
def test_when_arg_is_missing_then_is_not_subtype(self):
assert not is_subtype(
GraphQLObjectType("Object", {
"value": GraphQLField(
type=GraphQLNonNull(GraphQLInt),
args={},
)
}),
GraphQLObjectType("Object", {
"value": GraphQLField(
type=GraphQLNonNull(GraphQLInt),
args={"id": GraphQLArgument(type=GraphQLInt)},
)
}),
)
def test_when_field_has_extra_non_null_args_then_is_not_subtype(self):
assert not is_subtype(
GraphQLObjectType("Object", {
"value": GraphQLField(
type=GraphQLNonNull(GraphQLInt),
args={"id": GraphQLArgument(type=GraphQLNonNull(GraphQLInt))},
)
}),
GraphQLObjectType("Object", {
"value": GraphQLField(
type=GraphQLNonNull(GraphQLInt),
args={},
)
}),
)
def test_when_field_has_arg_of_supertype_then_is_subtype(self):
assert is_subtype(
GraphQLObjectType("Object", {
"value": GraphQLField(
type=GraphQLNonNull(GraphQLInt),
args={"id": GraphQLArgument(type=GraphQLInt)},
)
}),
GraphQLObjectType("Object", {
"value": GraphQLField(
type=GraphQLNonNull(GraphQLInt),
args={"id": GraphQLArgument(type=GraphQLNonNull(GraphQLInt))},
)
}),
)
def test_when_mutation_is_missing_then_is_not_subtype_of_schema_with_mutation(self):
assert not is_subtype(
GraphQLSchema(
query=GraphQLObjectType("Object", fields={
"id": GraphQLField(type=GraphQLInt),
}),
),
GraphQLSchema(
query=GraphQLObjectType("Object", fields={
"id": GraphQLField(type=GraphQLInt),
}),
mutation=GraphQLObjectType("Mutation", fields={
"id": GraphQLField(type=GraphQLInt),
}),
),
)
def test_list_of_type_is_not_subtype_of_list_of_subtype(self):
assert not is_subtype(GraphQLList(GraphQLInt), GraphQLList(GraphQLNonNull(GraphQLInt)))
def test_list_of_type_is_subtype_of_list_of_same_type(self):
assert is_subtype(GraphQLList(GraphQLInt), GraphQLList(GraphQLInt))
def test_non_null_type_is_not_subtype_of_different_null_type(self):
assert not is_subtype(GraphQLNonNull(GraphQLInt), GraphQLString)
def test_non_null_type_is_subtype_of_same_null_type(self):
assert is_subtype(GraphQLNonNull(GraphQLInt), GraphQLInt)
def test_scalar_types_are_not_subtypes_of_other_types(self, subtype, supertype):
assert not is_subtype(subtype, supertype)
def test_when_object_type_has_same_name_and_has_different_field_name_then_it_is_not_a_subtype(self):
assert not is_subtype(
GraphQLObjectType("Object", fields={"id": GraphQLField(type=GraphQLString)}),
GraphQLObjectType("Object", fields={"name": GraphQLField(type=GraphQLString)}),
)
def test_when_object_type_field_is_of_different_type_then_it_is_not_a_subtype(self, object_type):
assert not is_subtype(
object_type("Object", {"id": GraphQLString}),
object_type("Object", {"id": GraphQLInt}),
)
def test_when_object_types_have_different_names_then_they_are_not_subtypes(self, object_type):
assert not is_subtype(
object_type("First", {"id": GraphQLInt}),
object_type("Second", {"id": GraphQLInt}),
)
def test_when_input_object_is_missing_non_null_field_then_it_is_not_a_subtype(self):
assert not is_subtype(
GraphQLInputObjectType("Object", {"id": GraphQLInputObjectField(type=GraphQLInt)}),
GraphQLInputObjectType("Object", {"id": GraphQLInputObjectField(type=GraphQLInt), "name": GraphQLInputObjectField(type=GraphQLNonNull(GraphQLString))}),
)
def test_when_input_object_type_has_same_name_and_superset_of_fields_then_it_is_a_subtype(self):
assert is_subtype(
GraphQLInputObjectType("Object", {"id": GraphQLInputObjectField(type=GraphQLInt), "name": GraphQLInputObjectField(type=GraphQLString)}),
GraphQLInputObjectType("Object", {"id": GraphQLInputObjectField(type=GraphQLInt)}),
)
def test_when_object_types_have_same_name_and_fields_then_they_are_subtypes(self, object_type):
assert is_subtype(
object_type("Object", {"id": GraphQLInt}),
object_type("Object", {"id": GraphQLInt}),
)
def test_scalar_types_are_subtypes_of_themselves(self, graphql_type):
assert is_subtype(graphql_type, graphql_type)
def test_object_type_field_can_be_subtype(self, object_type):
assert is_subtype(
object_type("Object", {"id": GraphQLNonNull(GraphQLInt)}),
object_type("Object", {"id": GraphQLInt}),
)
def test_when_object_type_has_same_name_and_subset_of_fields_then_it_is_not_a_subtype(self):
assert not is_subtype(
GraphQLObjectType("Object", fields={"id": GraphQLField(type=GraphQLInt)}),
GraphQLObjectType("Object", fields={"id": GraphQLField(type=GraphQLInt), "name": GraphQLField(type=GraphQLString)}),
)
