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from math import inf, nan
from pytest import raises
from graphql.error import GraphQLError
from graphql.language import (
BooleanValueNode,
EnumValueNode,
FloatValueNode,
IntValueNode,
ListValueNode,
NameNode,
NullValueNode,
ObjectFieldNode,
ObjectValueNode,
StringValueNode,
)
from graphql.pyutils import Undefined
from graphql.type import (
GraphQLBoolean,
GraphQLEnumType,
GraphQLFloat,
GraphQLID,
GraphQLInputField,
GraphQLInputObjectType,
GraphQLInt,
GraphQLList,
GraphQLNonNull,
GraphQLScalarType,
GraphQLString,
)
from graphql.utilities import ast_from_value
def describe_ast_from_value():
def converts_boolean_values_to_asts():
assert ast_from_value(True, GraphQLBoolean) == BooleanValueNode(value=True)
assert ast_from_value(False, GraphQLBoolean) == BooleanValueNode(value=False)
assert ast_from_value(Undefined, GraphQLBoolean) is None
assert ast_from_value(None, GraphQLBoolean) == NullValueNode()
assert ast_from_value(0, GraphQLBoolean) == BooleanValueNode(value=False)
assert ast_from_value(1, GraphQLBoolean) == BooleanValueNode(value=True)
non_null_boolean = GraphQLNonNull(GraphQLBoolean)
assert ast_from_value(0, non_null_boolean) == BooleanValueNode(value=False)
def converts_int_values_to_int_asts():
assert ast_from_value(-1, GraphQLInt) == IntValueNode(value="-1")
assert ast_from_value(123.0, GraphQLInt) == IntValueNode(value="123")
assert ast_from_value(1e4, GraphQLInt) == IntValueNode(value="10000")
# GraphQL spec does not allow coercing non-integer values to Int to
# avoid accidental data loss.
with raises(GraphQLError) as exc_info:
assert ast_from_value(123.5, GraphQLInt)
msg = str(exc_info.value)
assert msg == "Int cannot represent non-integer value: 123.5"
# Note: outside the bounds of 32bit signed int.
with raises(GraphQLError) as exc_info:
assert ast_from_value(1e40, GraphQLInt)
msg = str(exc_info.value)
assert msg == "Int cannot represent non 32-bit signed integer value: 1e+40"
with raises(GraphQLError) as exc_info:
ast_from_value(nan, GraphQLInt)
msg = str(exc_info.value)
assert msg == "Int cannot represent non-integer value: nan"
def converts_float_values_to_float_asts():
# luckily in Python we can discern between float and int
assert ast_from_value(-1, GraphQLFloat) == FloatValueNode(value="-1")
assert ast_from_value(123.0, GraphQLFloat) == FloatValueNode(value="123")
assert ast_from_value(123.5, GraphQLFloat) == FloatValueNode(value="123.5")
assert ast_from_value(1e4, GraphQLFloat) == FloatValueNode(value="10000")
assert ast_from_value(1e40, GraphQLFloat) == FloatValueNode(value="1e+40")
assert ast_from_value(123456789.01234567, GraphQLFloat) == FloatValueNode(
value="123456789.01234567"
)
assert ast_from_value(1.1, GraphQLFloat) == FloatValueNode(value="1.1")
def converts_string_values_to_string_asts():
assert ast_from_value("hello", GraphQLString) == StringValueNode(value="hello")
assert ast_from_value("VALUE", GraphQLString) == StringValueNode(value="VALUE")
assert ast_from_value("VA\nLUE", GraphQLString) == StringValueNode(
value="VA\nLUE"
)
assert ast_from_value(123, GraphQLString) == StringValueNode(value="123")
assert ast_from_value(False, GraphQLString) == StringValueNode(value="false")
assert ast_from_value(None, GraphQLString) == NullValueNode()
assert ast_from_value(Undefined, GraphQLString) is None
def converts_id_values_to_int_or_string_asts():
assert ast_from_value("hello", GraphQLID) == StringValueNode(value="hello")
assert ast_from_value("VALUE", GraphQLID) == StringValueNode(value="VALUE")
# Note: EnumValues cannot contain non-identifier characters
assert ast_from_value("VA\nLUE", GraphQLID) == StringValueNode(value="VA\nLUE")
# Note: IntValues are used when possible.
assert ast_from_value(-1, GraphQLID) == IntValueNode(value="-1")
assert ast_from_value(123, GraphQLID) == IntValueNode(value="123")
assert ast_from_value("123", GraphQLID) == IntValueNode(value="123")
assert ast_from_value("01", GraphQLID) == StringValueNode(value="01")
with raises(GraphQLError) as exc_info:
assert ast_from_value(False, GraphQLID)
assert str(exc_info.value) == "ID cannot represent value: False"
assert ast_from_value(None, GraphQLID) == NullValueNode()
assert ast_from_value(Undefined, GraphQLString) is None
def converts_using_serialize_from_a_custom_scalar_type():
pass_through_scalar = GraphQLScalarType(
"PassThroughScalar",
serialize=lambda value: value,
)
assert ast_from_value("value", pass_through_scalar) == StringValueNode(
value="value"
)
with raises(TypeError) as exc_info:
assert ast_from_value(nan, pass_through_scalar)
assert str(exc_info.value) == "Cannot convert value to AST: nan."
with raises(TypeError) as exc_info:
ast_from_value(inf, pass_through_scalar)
assert str(exc_info.value) == "Cannot convert value to AST: inf."
return_null_scalar = GraphQLScalarType(
"ReturnNullScalar",
serialize=lambda value: None,
)
assert ast_from_value("value", return_null_scalar) is None
class SomeClass:
pass
return_custom_class_scalar = GraphQLScalarType(
"ReturnCustomClassScalar",
serialize=lambda value: SomeClass(),
)
with raises(TypeError) as exc_info:
ast_from_value("value", return_custom_class_scalar)
msg = str(exc_info.value)
assert msg == "Cannot convert value to AST: <SomeClass instance>."
def does_not_convert_non_null_values_to_null_value():
non_null_boolean = GraphQLNonNull(GraphQLBoolean)
assert ast_from_value(None, non_null_boolean) is None
complex_value = {"someArbitrary": "complexValue"}
my_enum = GraphQLEnumType(
"MyEnum", {"HELLO": None, "GOODBYE": None, "COMPLEX": complex_value}
)
def converts_string_values_to_enum_asts_if_possible():
assert ast_from_value("HELLO", my_enum) == EnumValueNode(value="HELLO")
assert ast_from_value(complex_value, my_enum) == EnumValueNode(value="COMPLEX")
# Note: case sensitive
with raises(GraphQLError) as exc_info:
ast_from_value("hello", my_enum)
assert exc_info.value.message == "Enum 'MyEnum' cannot represent value: 'hello'"
# Note: not a valid enum value
with raises(GraphQLError) as exc_info:
ast_from_value("UNKNOWN_VALUE", my_enum)
assert (
exc_info.value.message
== "Enum 'MyEnum' cannot represent value: 'UNKNOWN_VALUE'"
)
def converts_list_values_to_list_asts():
assert ast_from_value(
["FOO", "BAR"], GraphQLList(GraphQLString)
) == ListValueNode(
values=[StringValueNode(value="FOO"), StringValueNode(value="BAR")]
)
assert ast_from_value(
["HELLO", "GOODBYE"], GraphQLList(my_enum)
) == ListValueNode(
values=[EnumValueNode(value="HELLO"), EnumValueNode(value="GOODBYE")]
)
def list_generator():
yield 1
yield 2
yield 3
assert ast_from_value(list_generator(), GraphQLList(GraphQLInt)) == (
ListValueNode(
values=[
IntValueNode(value="1"),
IntValueNode(value="2"),
IntValueNode(value="3"),
]
)
)
def converts_list_singletons():
assert ast_from_value("FOO", GraphQLList(GraphQLString)) == StringValueNode(
value="FOO"
)
def skips_invalid_list_items():
ast = ast_from_value(
["FOO", None, "BAR"], GraphQLList(GraphQLNonNull(GraphQLString))
)
assert ast == ListValueNode(
values=[StringValueNode(value="FOO"), StringValueNode(value="BAR")]
)
input_obj = GraphQLInputObjectType(
"MyInputObj",
{"foo": GraphQLInputField(GraphQLFloat), "bar": GraphQLInputField(my_enum)},
)
def converts_input_objects():
assert ast_from_value({"foo": 3, "bar": "HELLO"}, input_obj) == ObjectValueNode(
fields=[
ObjectFieldNode(
name=NameNode(value="foo"), value=FloatValueNode(value="3")
),
ObjectFieldNode(
name=NameNode(value="bar"), value=EnumValueNode(value="HELLO")
),
]
)
def converts_input_objects_with_explicit_nulls():
assert ast_from_value({"foo": None}, input_obj) == ObjectValueNode(
fields=[ObjectFieldNode(name=NameNode(value="foo"), value=NullValueNode())]
)
def does_not_convert_non_object_values_as_input_objects():
assert ast_from_value(5, input_obj) is None
|
