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from typing import Awaitable
from pytest import mark, raises
from graphql.execution import MiddlewareManager, execute
from graphql.language.parser import parse
from graphql.type import GraphQLField, GraphQLObjectType, GraphQLSchema, GraphQLString
def describe_middleware():
def describe_with_manager():
def default():
doc = parse("{ field }")
# noinspection PyMethodMayBeStatic
class Data:
def field(self, _info):
return "resolved"
test_type = GraphQLObjectType(
"TestType", {"field": GraphQLField(GraphQLString)}
)
middlewares = MiddlewareManager()
result = execute(
GraphQLSchema(test_type), doc, Data(), middleware=middlewares
)
assert result.data["field"] == "resolved" # type: ignore
def single_function():
doc = parse("{ first second }")
# noinspection PyMethodMayBeStatic
class Data:
def first(self, _info):
return "one"
def second(self, _info):
return "two"
test_type = GraphQLObjectType(
"TestType",
{
"first": GraphQLField(GraphQLString),
"second": GraphQLField(GraphQLString),
},
)
def reverse_middleware(next_, *args, **kwargs):
return next_(*args, **kwargs)[::-1]
middlewares = MiddlewareManager(reverse_middleware)
result = execute(
GraphQLSchema(test_type), doc, Data(), middleware=middlewares
)
assert result.data == {"first": "eno", "second": "owt"} # type: ignore
def two_functions_and_field_resolvers():
doc = parse("{ first second }")
# noinspection PyMethodMayBeStatic
class Data:
first = "one"
second = "two"
test_type = GraphQLObjectType(
"TestType",
{
"first": GraphQLField(
GraphQLString, resolve=lambda obj, _info: obj.first
),
"second": GraphQLField(
GraphQLString, resolve=lambda obj, _info: obj.second
),
},
)
def reverse_middleware(next_, *args, **kwargs):
return next_(*args, **kwargs)[::-1]
def capitalize_middleware(next_, *args, **kwargs):
return next_(*args, **kwargs).capitalize()
middlewares = MiddlewareManager(reverse_middleware, capitalize_middleware)
result = execute(
GraphQLSchema(test_type), doc, Data(), middleware=middlewares
)
assert result.data == {"first": "Eno", "second": "Owt"} # type: ignore
@mark.asyncio
async def single_async_function():
doc = parse("{ first second }")
# noinspection PyMethodMayBeStatic
class Data:
async def first(self, _info):
return "one"
async def second(self, _info):
return "two"
test_type = GraphQLObjectType(
"TestType",
{
"first": GraphQLField(GraphQLString),
"second": GraphQLField(GraphQLString),
},
)
async def reverse_middleware(next_, *args, **kwargs):
return (await next_(*args, **kwargs))[::-1]
middlewares = MiddlewareManager(reverse_middleware)
awaitable_result = execute(
GraphQLSchema(test_type), doc, Data(), middleware=middlewares
)
assert isinstance(awaitable_result, Awaitable)
result = await awaitable_result
assert result.data == {"first": "eno", "second": "owt"}
def single_object():
doc = parse("{ first second }")
# noinspection PyMethodMayBeStatic
class Data:
def first(self, _info):
return "one"
def second(self, _info):
return "two"
test_type = GraphQLObjectType(
"TestType",
{
"first": GraphQLField(GraphQLString),
"second": GraphQLField(GraphQLString),
},
)
class ReverseMiddleware:
# noinspection PyMethodMayBeStatic
def resolve(self, next_, *args, **kwargs):
return next_(*args, **kwargs)[::-1]
middlewares = MiddlewareManager(ReverseMiddleware())
result = execute(
GraphQLSchema(test_type), doc, Data(), middleware=middlewares
)
assert result.data == {"first": "eno", "second": "owt"} # type: ignore
def skip_middleware_without_resolve_method():
class BadMiddleware:
pass # no resolve method here
assert execute(
GraphQLSchema(
GraphQLObjectType(
"TestType",
{"foo": GraphQLField(GraphQLString)},
)
),
parse("{ foo }"),
{"foo": "bar"},
middleware=MiddlewareManager(BadMiddleware()),
) == ({"foo": "bar"}, None)
def with_function_and_object():
doc = parse("{ field }")
# noinspection PyMethodMayBeStatic
class Data:
def field(self, _info):
return "resolved"
test_type = GraphQLObjectType(
"TestType", {"field": GraphQLField(GraphQLString)}
)
def reverse_middleware(next_, *args, **kwargs):
return next_(*args, **kwargs)[::-1]
class CaptitalizeMiddleware:
# noinspection PyMethodMayBeStatic
def resolve(self, next_, *args, **kwargs):
return next_(*args, **kwargs).capitalize()
middlewares = MiddlewareManager(reverse_middleware, CaptitalizeMiddleware())
result = execute(
GraphQLSchema(test_type), doc, Data(), middleware=middlewares
)
assert result.data == {"field": "Devloser"} # type: ignore
middlewares = MiddlewareManager(CaptitalizeMiddleware(), reverse_middleware)
result = execute(
GraphQLSchema(test_type), doc, Data(), middleware=middlewares
)
assert result.data == {"field": "devloseR"} # type: ignore
@mark.asyncio
async def with_async_function_and_object():
doc = parse("{ field }")
# noinspection PyMethodMayBeStatic
class Data:
async def field(self, _info):
return "resolved"
test_type = GraphQLObjectType(
"TestType", {"field": GraphQLField(GraphQLString)}
)
async def reverse_middleware(next_, *args, **kwargs):
return (await next_(*args, **kwargs))[::-1]
class CaptitalizeMiddleware:
# noinspection PyMethodMayBeStatic
async def resolve(self, next_, *args, **kwargs):
return (await next_(*args, **kwargs)).capitalize()
middlewares = MiddlewareManager(reverse_middleware, CaptitalizeMiddleware())
awaitable_result = execute(
GraphQLSchema(test_type), doc, Data(), middleware=middlewares
)
assert isinstance(awaitable_result, Awaitable)
result = await awaitable_result
assert result.data == {"field": "Devloser"}
middlewares = MiddlewareManager(CaptitalizeMiddleware(), reverse_middleware)
awaitable_result = execute(
GraphQLSchema(test_type), doc, Data(), middleware=middlewares
)
assert isinstance(awaitable_result, Awaitable)
result = await awaitable_result
assert result.data == {"field": "devloseR"}
def describe_without_manager():
def no_middleware():
doc = parse("{ field }")
# noinspection PyMethodMayBeStatic
class Data:
def field(self, _info):
return "resolved"
test_type = GraphQLObjectType(
"TestType", {"field": GraphQLField(GraphQLString)}
)
result = execute(GraphQLSchema(test_type), doc, Data(), middleware=None)
assert result.data["field"] == "resolved" # type: ignore
def empty_middleware_list():
doc = parse("{ field }")
# noinspection PyMethodMayBeStatic
class Data:
def field(self, _info):
return "resolved"
test_type = GraphQLObjectType(
"TestType", {"field": GraphQLField(GraphQLString)}
)
result = execute(GraphQLSchema(test_type), doc, Data(), middleware=[])
assert result.data["field"] == "resolved" # type: ignore
def bad_middleware_object():
doc = parse("{ field }")
test_type = GraphQLObjectType(
"TestType", {"field": GraphQLField(GraphQLString)}
)
with raises(TypeError) as exc_info:
# noinspection PyTypeChecker
execute(
GraphQLSchema(test_type),
doc,
None,
middleware={"bad": "value"}, # type: ignore
)
assert str(exc_info.value) == (
"Middleware must be passed as a list or tuple of functions"
" or objects, or as a single MiddlewareManager object."
" Got {'bad': 'value'} instead."
)
def list_of_functions():
doc = parse("{ field }")
# noinspection PyMethodMayBeStatic
class Data:
def field(self, _info):
return "resolved"
test_type = GraphQLObjectType(
"TestType", {"field": GraphQLField(GraphQLString)}
)
log = []
class LogMiddleware:
def __init__(self, name):
self.name = name
# noinspection PyMethodMayBeStatic
def resolve(self, next_, *args, **kwargs):
log.append(f"enter {self.name}")
value = next_(*args, **kwargs)
log.append(f"exit {self.name}")
return value
middlewares = [LogMiddleware("A"), LogMiddleware("B"), LogMiddleware("C")]
result = execute(
GraphQLSchema(test_type), doc, Data(), middleware=middlewares
)
assert result.data == {"field": "resolved"} # type: ignore
assert log == [
"enter C",
"enter B",
"enter A",
"exit A",
"exit B",
"exit C",
]
|
