def test_can_request_fields_of_list():
Root = g.ObjectType(
"Root",
fields=lambda: (
g.field("one", type=g.ListType(One)),
),
)
One = g.ObjectType(
"One",
fields=lambda: (
g.field("two", type=g.Int),
),
)
graphql_query = """
query {
one {
two
}
}
"""
object_query = _document_text_to_graph_query(graphql_query, query_type=Root)
assert_that(object_query, is_query(
Root(
g.key("one", Root.fields.one(
g.key("two", One.fields.two()),
)),
),
))
def test_fragment_can_be_spread_into_nullable_type():
User = g.ObjectType("User", fields=lambda: (
g.field("name", type=g.String),
))
Root = g.ObjectType(
"Root",
fields=lambda: (
g.field("user", type=g.NullableType(User)),
),
)
graphql_query = """
query {
user {
... on User {
name
}
}
}
"""
object_query = _document_text_to_graph_query(graphql_query, query_type=Root)
assert_that(object_query, is_query(
Root(
g.key("user", Root.fields.user(
g.key("name", User.fields.name()),
)),
),
))
def test_simple_mutation_is_converted_to_object_query():
QueryRoot = g.ObjectType(
"Query",
(
g.field("query_value", type=g.Int),
),
)
MutationRoot = g.ObjectType(
"Mutation",
(
g.field("mutation_value", type=g.Int),
),
)
graphql_query = """
mutation {
mutationValue
}
"""
object_query = _document_text_to_graph_query(graphql_query, query_type=QueryRoot, mutation_type=MutationRoot)
assert_that(object_query, is_query(
MutationRoot(
g.key("mutationValue", MutationRoot.fields.mutation_value()),
),
))
def graphlayer_performance():
import graphlayer as g
from graphlayer import graphql
User = g.ObjectType("User",
fields=(
g.field("id", type=g.Int),
g.field("name", type=g.String),
))
Query = g.ObjectType("Query",
fields=(g.field("users", type=g.ListType(User)), ))
root_resolver = g.root_object_resolver(Query)
@root_resolver.field(Query.fields.users)
def root_resolve_users(graph, query, args):
return graph.resolve(query)
@g.resolver(g.ListType(User))
def resolve_users(graph, query):
return [
query.element_query.create_object(
dict((field_query.key, getattr(user, field_query.field.name))
for field_query in query.element_query.fields))
for user in users
]
resolvers = (root_resolver, resolve_users)
graph_definition = g.define_graph(resolvers=resolvers)
graph = graph_definition.create_graph({})
return lambda document_text: graphql.execute(
graph=graph, document_text=document_text, query_type=Query)
def test_when_merging_fragments_then_nested_object_fields_can_overlap():
Root = g.ObjectType(
"Root",
fields=lambda: (g.field("user", type=User), ),
)
User = g.ObjectType(
"User",
fields=lambda: (g.field("address", type=Address), ),
)
Address = g.ObjectType(
"Address",
fields=lambda: (
g.field("first_line", type=g.String),
g.field("city", type=g.String),
g.field("postcode", type=g.String),
),
)
graphql_query = """
query {
... on Root {
user {
address {
firstLine
city
}
}
}
... on Root {
user {
address {
city
postcode
}
}
}
}
"""
object_query = _document_text_to_graph_query(graphql_query,
query_type=Root)
assert_that(
object_query,
is_query(
Root(
g.key(
"user",
Root.fields.user(
g.key(
"address",
User.fields.address(
g.key("firstLine",
Address.fields.first_line()),
g.key("city", Address.fields.city()),
g.key("postcode", Address.fields.postcode()),
)), )), ), ))
def test_can_recursively_resolve():
Root = g.ObjectType(
"Root",
fields=lambda: [
g.field("books", type=g.ListType(Book)),
],
)
Book = g.ObjectType(
"Book",
fields=lambda: [
g.field("title", type=g.String),
],
)
@g.resolver(Root)
def resolve_root(graph, query):
return query.create_object(iterables.to_dict(
(field_query.key, graph.resolve(field_query.type_query))
for field_query in query.field_queries
))
@g.resolver(g.ListType(Book))
def resolve_book(graph, query):
books = [
dict(title="Leave it to Psmith"),
dict(title="Pericles, Prince of Tyre"),
]
return [
query.element_query.create_object(iterables.to_dict(
(field_query.key, book[field_query.field.name])
for field_query in query.element_query.field_queries
))
for book in books
]
resolvers = [resolve_root, resolve_book]
query = Root(
g.key("books", Root.fields.books(
g.key("title", Book.fields.title()),
)),
)
result = g.create_graph(resolvers).resolve(query)
assert_that(result, has_attrs(
books=contains_exactly(
has_attrs(title="Leave it to Psmith"),
has_attrs(title="Pericles, Prince of Tyre"),
),
))
def test_graphql_arg_values_from_variables_are_converted(graph_type, graphql_type, variable_value, arg_value):
if callable(arg_value):
arg_value = arg_value(graph_type)
Root = g.ObjectType(
"Root",
fields=(
g.field("one", type=g.Int, params=[
g.param("arg", type=graph_type),
]),
),
)
graphql_query = """
query ($var: %s) {
one(arg: $var)
}
""" % (graphql_type, )
object_query = _document_text_to_graph_query(graphql_query, query_type=Root, variables={"var": variable_value})
assert_that(object_query, is_query(
Root(
g.key("one", Root.fields.one(
Root.fields.one.params.arg(arg_value),
)),
),
))
def test_when_null_variable_is_missing_then_variable_is_null():
Root = g.ObjectType(
"Root",
fields=(
g.field("one", type=g.Int, params=[
g.param("arg", type=g.NullableType(g.Int)),
]),
),
)
graphql_query = """
query ($var: Int) {
one(arg: $var)
}
"""
object_query = _document_text_to_graph_query(graphql_query, query_type=Root, variables={})
assert_that(object_query, is_query(
Root(
g.key("one", Root.fields.one(
Root.fields.one.params.arg(None),
)),
),
))
def test_graphql_field_args_are_converted_to_snake_case():
Root = g.ObjectType(
"Root",
fields=(
g.field("one", type=g.Int, params=[
g.param("arg_zero", type=g.String),
]),
),
)
graphql_query = """
query {
one(argZero: "one")
}
"""
object_query = _document_text_to_graph_query(graphql_query, query_type=Root)
assert_that(object_query, is_query(
Root(
g.key("one", Root.fields.one(
Root.fields.one.params.arg_zero("one"),
)),
),
))
def test_literal_graphql_arg_values_are_converted(arg_type, arg_string, arg_value):
if callable(arg_value):
arg_value = arg_value(arg_type)
Root = g.ObjectType(
"Root",
fields=(
g.field("one", type=g.Int, params=[
g.param("arg", type=arg_type),
]),
),
)
graphql_query = """
query {
one(arg: %s)
}
""" % (arg_string, )
object_query = _document_text_to_graph_query(graphql_query, query_type=Root)
assert_that(object_query, is_query(
Root(
g.key("one", Root.fields.one(
Root.fields.one.params.arg(arg_value),
)),
),
))
def test_graphql_query_args_are_read():
Root = g.ObjectType(
"Root",
fields=(g.field("one",
type=g.Int,
params=[
g.param("arg", type=g.Int),
]), ),
)
graphql_query = """
query ($value: Int!) {
one(arg: $value)
}
"""
object_query = _document_text_to_graph_query(graphql_query,
query_type=Root,
variables={"value": 42})
assert_that(
object_query,
is_query(
Root(
g.key("one",
Root.fields.one(Root.fields.one.params.arg(42), )), ), ))
def test_graphql_field_args_are_read():
Root = g.ObjectType(
"Root",
fields=(
g.field("one", type=g.Int, params=[
g.param("arg0", type=g.String),
g.param("arg1", type=g.String),
]),
),
)
graphql_query = """
query {
one(arg0: "one", arg1: "two")
}
"""
object_query = _document_text_to_graph_query(graphql_query, query_type=Root)
assert_that(object_query, is_query(
Root(
g.key("one", Root.fields.one(
Root.fields.one.params.arg0("one"),
Root.fields.one.params.arg1("two"),
)),
),
))
def test_variables_can_be_used_in_schema_query():
Root = g.ObjectType("Root", fields=(g.field("value", g.String), ))
graph_definition = g.define_graph(resolvers=())
graph = graph_definition.create_graph({})
query = """
query ($f: Boolean!, $t: Boolean!) {
included: __schema @include(if: $t) {
queryType { name }
}
excluded: __schema @include(if: $f) {
queryType { name }
}
}
"""
variables = {"t": True, "f": False}
result = graphql.execute(graph=graph,
document_text=query,
query_type=Root,
variables=variables)
assert_that(
result,
is_success(data=equal_to({
"included": {
"queryType": {
"name": "Root",
},
},
})))
def test_can_query_schema():
Root = g.ObjectType("Root", fields=(g.field("value", g.String), ))
graph_definition = g.define_graph(resolvers=())
graph = graph_definition.create_graph({})
query = """
query {
__schema {
queryType { name }
}
}
"""
result = graphql.execute(graph=graph, document_text=query, query_type=Root)
assert_that(
result,
is_success(data=equal_to({
"__schema": {
"queryType": {
"name": "Root",
},
},
})))
def test_object_builder_getters_access_value_directly(self):
User = g.ObjectType("User",
fields=(
g.field("name", type=g.String),
g.field("email_address", type=g.String),
))
object_builder = g.create_object_builder(
User(
g.key("n", User.fields.name()),
g.key("e", User.fields.email_address()),
))
@object_builder.getter(User.fields.name)
def resolve_name(user):
return user["name"]
@object_builder.getter(User.fields.email_address)
def resolve_email_address(user):
return user["emailAddress"]
result = object_builder({
"name": "Bob",
"emailAddress": "*****@*****.**"
})
assert_that(result, has_attrs(
n="Bob",
e="*****@*****.**",
))
def test_when_field_value_in_input_object_in_input_object_is_not_set_then_default_is_used(
):
Input = schema.InputObjectType(
"Input",
fields=(schema.input_field("field0", type=schema.Int, default=42), ),
)
OuterInput = schema.InputObjectType(
"OuterInput",
fields=(schema.input_field("value", type=Input), ),
)
Root = g.ObjectType(
"Root",
fields=(g.field("one",
type=g.Int,
params=[
g.param("arg", type=OuterInput),
]), ),
)
graphql_query = """
query ($value: Int!) {
one(arg: {value: {}})
}
"""
object_query = _document_text_to_graph_query(graphql_query,
query_type=Root)
assert_that(object_query.fields[0].args.arg,
has_attrs(value=has_attrs(field0=42, ), ))
def test_directives_can_use_variables(self):
Root = g.ObjectType(
"Root",
(
g.field("one", type=g.Int),
),
)
graphql_query = """
query ($t: Boolean!, $f: Boolean!) {
includedField: one @include(if: $t)
excludedField: one @include(if: $f)
}
"""
object_query = _document_text_to_graph_query(
graphql_query,
query_type=Root,
variables={"t": True, "f": False},
)
assert_that(object_query, is_query(
Root(
g.key("includedField", Root.fields.one()),
),
))
def test_directives_can_be_used_on_fragment_spreads(self):
Root = g.ObjectType(
"Root",
(
g.field("one", type=g.Int),
),
)
graphql_query = """
query {
... IncludedFragment @include(if: true)
... ExcludedFragment @include(if: false)
}
fragment IncludedFragment on Root {
includedField: one
}
fragment ExcludedFragment on Root {
excludedField: one
}
"""
object_query = _document_text_to_graph_query(graphql_query, query_type=Root)
assert_that(object_query, is_query(
Root(
g.key("includedField", Root.fields.one()),
),
))
def test_can_query_schema_with_other_data():
Root = g.ObjectType("Root", fields=(g.field("value", g.String), ))
root_resolver = g.root_object_resolver(Root)
@root_resolver.field(Root.fields.value)
def root_resolve_value(graph, query, args):
return "resolved"
graph_definition = g.define_graph(resolvers=(root_resolver, ))
graph = graph_definition.create_graph({})
query = """
query {
value
__schema {
queryType { name }
}
}
"""
result = graphql.execute(graph=graph, document_text=query, query_type=Root)
assert_that(
result,
is_success(data=equal_to({
"value": "resolved",
"__schema": {
"queryType": {
"name": "Root",
},
},
})))
def test_when_input_object_variable_is_missing_field_then_error_is_raised():
Input = g.InputObjectType(
"Input",
fields=lambda: (
g.input_field("field", type=g.Int),
),
)
Root = g.ObjectType(
"Root",
fields=(
g.field("one", type=g.Int, params=[
g.param("arg", type=Input),
]),
),
)
graphql_query = """
query ($var: Input!) {
one(arg: $var)
}
"""
variables = {"var": {}}
error = pytest.raises(
GraphQLError,
lambda: _document_text_to_graph_query(graphql_query, query_type=Root, variables=variables),
)
assert_that(error.value.message, equal_to("Variable '$var' got invalid value {}; Field value.field of required type Int! was not provided."))
def test_fragments_are_recursively_merged():
Root = g.ObjectType(
"Root",
fields=lambda: (
g.field("value", type=g.Int),
),
)
graphql_query = """
query {
... on Root {
... on Root {
one: value
}
}
... on Root {
... on Root {
two: value
}
}
}
"""
object_query = _document_text_to_graph_query(graphql_query, query_type=Root)
assert_that(object_query, is_query(
Root(
g.key("one", Root.fields.value()),
g.key("two", Root.fields.value()),
),
))
def test_when_field_value_in_input_object_in_list_is_not_set_then_default_is_used():
Input = schema.InputObjectType(
"Input",
fields=(
schema.input_field("field0", type=schema.Int, default=42),
),
)
Root = g.ObjectType(
"Root",
fields=(
g.field("one", type=g.Int, params=[
g.param("arg", type=g.ListType(Input)),
]),
),
)
graphql_query = """
query {
one(arg: [{}])
}
"""
object_query = _document_text_to_graph_query(graphql_query, query_type=Root)
assert_that(object_query.field_queries[0].args.arg, is_sequence(
has_attrs(
field0=42,
),
))
def test_typename():
Root = g.ObjectType("Root", fields=(g.field("value", g.String), ))
root_resolver = g.root_object_resolver(Root)
@root_resolver.field(Root.fields.value)
def root_resolve_value(graph, query, args):
return "resolved"
graph_definition = g.define_graph(resolvers=(root_resolver, ))
graph = graph_definition.create_graph({})
query = """
query {
__typename
value
typename: __typename
}
"""
result = graphql.execute(graph=graph, document_text=query, query_type=Root)
assert_that(
result,
is_success(data=equal_to({
"__typename": "Root",
"value": "resolved",
"typename": "Root"
})))
def test_object_builder_creates_object_using_field_resolvers(self):
User = g.ObjectType("User",
fields=(g.field("name",
type=g.String,
params=(g.param(
"truncate",
type=g.Int,
default=None), )), ))
object_builder = g.create_object_builder(
User(
g.key("name", User.fields.name()),
g.key("initial",
User.fields.name(User.fields.name.params.truncate(1))),
))
@object_builder.field(User.fields.name)
def resolve_name(field_query):
if field_query.args.truncate is None:
return lambda user: user["name"]
else:
return lambda user: user["name"][:field_query.args.truncate]
result = object_builder({"name": "Bob"})
assert_that(result, has_attrs(
name="Bob",
initial="B",
))
def test_named_fragments_are_expanded():
Root = g.ObjectType(
"Root",
(
g.field("value", type=g.Int),
),
)
graphql_query = """
query {
one: value
...Two
three: value
...Four
}
fragment Two on Root {
two: value
}
fragment Four on Root {
four: value
}
"""
object_query = _document_text_to_graph_query(graphql_query, query_type=Root)
assert_that(object_query, is_query(
Root(
g.key("one", Root.fields.value()),
g.key("two", Root.fields.value()),
g.key("three", Root.fields.value()),
g.key("four", Root.fields.value()),
),
))
def test_can_get_scalar_from_root():
Root = g.ObjectType(
"Root",
fields=[
g.field("one", type=g.Int),
g.field("two", type=g.Int),
],
)
@g.resolver(Root)
def resolve_root(graph, query):
values = dict(
one=1,
two=2,
)
return query.create_object(
iterables.to_dict((field_query.key, values[field_query.field.name])
for field_query in query.fields))
resolvers = [resolve_root]
query = Root(g.key("value", Root.fields.one()), )
result = g.create_graph(resolvers).resolve(query)
assert_that(result, has_attrs(value=1))
def test_when_resolution_raises_graph_error_then_result_is_invalid():
Root = g.ObjectType("Root", fields=(
g.field("value", g.String),
))
root_resolver = g.root_object_resolver(Root)
@root_resolver.field(Root.fields.value)
def root_resolve_value(graph, query, args):
raise g.GraphError("BAD")
graph_definition = g.define_graph(resolvers=(root_resolver, ))
graph = graph_definition.create_graph({})
query = """
query {
value
}
"""
result = graphql.execute(graph=graph, document_text=query, query_type=Root)
assert_that(result, is_invalid(errors=contains_exactly(
all_of(
is_instance(GraphQLError),
has_str("BAD"),
),
)))
def test_when_type_is_object_then_typename_field_is_resolved(self):
User = g.ObjectType("User", fields=(g.field("name", type=g.String), ))
object_builder = g.create_object_builder(
User(g.key("type", schema.typename_field()), ))
result = object_builder({})
assert_that(result, has_attrs(type="User", ))
def test_when_merging_fragments_then_scalar_fields_can_overlap():
Root = g.ObjectType(
"Root",
fields=lambda: (g.field("user", type=User), ),
)
User = g.ObjectType(
"User",
fields=(
g.field("name", type=g.String),
g.field("address", type=g.String),
g.field("role", type=g.String),
),
)
graphql_query = """
query {
... on Root {
user {
name
address
}
}
... on Root {
user {
name
role
}
}
}
"""
object_query = _document_text_to_graph_query(graphql_query,
query_type=Root)
assert_that(
object_query,
is_query(
Root(
g.key(
"user",
Root.fields.user(
g.key("name", User.fields.name()),
g.key("address", User.fields.address()),
g.key("role", User.fields.role()),
)), ), ))
def to_graphql_input_type(graph_type):
root_type = g.ObjectType("Root", fields=(
g.field("value", type=g.String, params=(
g.param("arg0", type=graph_type),
)),
))
graphql_schema = create_graphql_schema(query_type=root_type, mutation_type=None).graphql_schema
return graphql_schema.query_type.fields["value"].args["arg0"].type
