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from typing import cast, Any, Awaitable
from pytest import mark
from graphql.execution import execute, execute_sync, ExecutionResult
from graphql.language import parse
from graphql.pyutils import is_awaitable
from graphql.utilities import build_schema
class Data:
def __init__(self, value):
self.listField = value
async def get_async(value):
return value
def describe_execute_accepts_any_iterable_as_list_value():
def _complete(list_field):
return execute_sync(
build_schema("type Query { listField: [String] }"),
parse("{ listField }"),
Data(list_field),
)
def accepts_a_set_as_a_list_value():
# Note that sets are not ordered in Python.
list_field = {"apple", "banana", "coconut"}
result = _complete(list_field)
assert result.errors is None
assert isinstance(result.data, dict)
assert list(result.data) == ["listField"]
assert isinstance(result.data["listField"], list)
assert set(result.data["listField"]) == list_field
def accepts_a_generator_as_a_list_value():
def list_field():
yield "one"
yield 2
yield True
assert _complete(list_field()) == (
{"listField": ["one", "2", "true"]},
None,
)
def accepts_a_custom_iterable_as_a_list_value():
class ListField:
def __iter__(self):
self.last = "hello"
return self
def __next__(self):
last = self.last
if last == "stop":
raise StopIteration
self.last = "world" if last == "hello" else "stop"
return last
assert _complete(ListField()) == (
{"listField": ["hello", "world"]},
None,
)
def accepts_function_arguments_as_a_list_value():
def get_args(*args):
return args # actually just a tuple, nothing special in Python
assert _complete(get_args("one", "two")) == (
{"listField": ["one", "two"]},
None,
)
def does_not_accept_a_dict_as_a_list_value():
assert _complete({1: "one", 2: "two"}) == (
{"listField": None},
[
{
"message": "Expected Iterable,"
" but did not find one for field 'Query.listField'.",
"locations": [(1, 3)],
"path": ["listField"],
}
],
)
def does_not_accept_iterable_string_literal_as_a_list_value():
assert _complete("Singular") == (
{"listField": None},
[
{
"message": "Expected Iterable,"
" but did not find one for field 'Query.listField'.",
"locations": [(1, 3)],
"path": ["listField"],
}
],
)
def describe_execute_handles_list_nullability():
async def _complete(list_field: Any, as_type: str) -> ExecutionResult:
schema = build_schema(f"type Query {{ listField: {as_type} }}")
document = parse("{ listField }")
def execute_query(list_value: Any) -> Any:
return execute(schema, document, Data(list_value))
result = execute_query(list_field)
assert isinstance(result, ExecutionResult)
assert await execute_query(get_async(list_field)) == result
if isinstance(list_field, list):
assert await execute_query(list(map(get_async, list_field))) == result
assert await execute_query(get_async(list_field)) == result
return result
@mark.asyncio
async def contains_values():
list_field = [1, 2]
assert await _complete(list_field, "[Int]") == ({"listField": [1, 2]}, None)
assert await _complete(list_field, "[Int]!") == ({"listField": [1, 2]}, None)
assert await _complete(list_field, "[Int!]") == ({"listField": [1, 2]}, None)
assert await _complete(list_field, "[Int!]!") == ({"listField": [1, 2]}, None)
@mark.asyncio
async def contains_null():
list_field = [1, None, 2]
errors = [
{
"message": "Cannot return null for non-nullable field Query.listField.",
"locations": [(1, 3)],
"path": ["listField", 1],
}
]
assert await _complete(list_field, "[Int]") == (
{"listField": [1, None, 2]},
None,
)
assert await _complete(list_field, "[Int]!") == (
{"listField": [1, None, 2]},
None,
)
assert await _complete(list_field, "[Int!]") == ({"listField": None}, errors)
assert await _complete(list_field, "[Int!]!") == (None, errors)
@mark.asyncio
async def returns_null():
list_field = None
errors = [
{
"message": "Cannot return null for non-nullable field Query.listField.",
"locations": [(1, 3)],
"path": ["listField"],
}
]
assert await _complete(list_field, "[Int]") == ({"listField": None}, None)
assert await _complete(list_field, "[Int]!") == (None, errors)
assert await _complete(list_field, "[Int!]") == ({"listField": None}, None)
assert await _complete(list_field, "[Int!]!") == (None, errors)
@mark.asyncio
async def contains_error():
list_field = [1, RuntimeError("bad"), 2]
errors = [
{
"message": "bad",
"locations": [(1, 3)],
"path": ["listField", 1],
}
]
assert await _complete(list_field, "[Int]") == (
{"listField": [1, None, 2]},
errors,
)
assert await _complete(list_field, "[Int]!") == (
{"listField": [1, None, 2]},
errors,
)
assert await _complete(list_field, "[Int!]") == (
{"listField": None},
errors,
)
assert await _complete(list_field, "[Int!]!") == (
None,
errors,
)
@mark.asyncio
async def results_in_errors():
list_field = RuntimeError("bad")
errors = [
{
"message": "bad",
"locations": [(1, 3)],
"path": ["listField"],
}
]
assert await _complete(list_field, "[Int]") == (
{"listField": None},
errors,
)
assert await _complete(list_field, "[Int]!") == (
None,
errors,
)
assert await _complete(list_field, "[Int!]") == (
{"listField": None},
errors,
)
assert await _complete(list_field, "[Int!]!") == (
None,
errors,
)
def describe_experimental_execute_accepts_async_iterables_as_list_value():
async def _complete(list_field):
result = execute(
build_schema("type Query { listField: [String] }"),
parse("{ listField }"),
Data(list_field),
)
assert is_awaitable(result)
result = cast(Awaitable, result)
return await result
@mark.asyncio
async def accepts_an_async_generator_as_a_list_value():
async def list_field():
yield "one"
yield 2
yield True
assert await _complete(list_field()) == (
{"listField": ["one", "2", "true"]},
None,
)
@mark.asyncio
async def accepts_a_custom_async_iterable_as_a_list_value():
class ListField:
def __aiter__(self):
self.last = "hello"
return self
async def __anext__(self):
last = self.last
if last == "stop":
raise StopAsyncIteration
self.last = "world" if last == "hello" else "stop"
return last
assert await _complete(ListField()) == (
{"listField": ["hello", "world"]},
None,
)
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