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test_schema_parser.py
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from graphql import FileSource, Source, parse
from graphql.error import GraphQLSyntaxError
from graphql.language import ast
from graphql.language.parser import Loc
import os
from pytest import raises
from typing import Callable
def create_loc_fn(body):
# type: (str) -> Callable
source = Source(body)
return lambda start, end: Loc(start, end, source)
def test_parses_simple_type():
# type: () -> None
body = """
type Hello {
world: String
}"""
doc = parse(body)
loc = create_loc_fn(body)
expected = ast.Document(
definitions=[
ast.ObjectTypeDefinition(
name=ast.Name(value="Hello", loc=loc(6, 11)),
interfaces=[],
directives=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="world", loc=loc(16, 21)),
arguments=[],
type=ast.NamedType(
name=ast.Name(value="String", loc=loc(23, 29)),
loc=loc(23, 29),
),
directives=[],
loc=loc(16, 29),
)
],
loc=loc(1, 31),
)
],
loc=loc(1, 31),
)
assert doc == expected
def test_parses_simple_extension():
# type: () -> None
body = """
extend type Hello {
world: String
}"""
doc = parse(body)
loc = create_loc_fn(body)
expected = ast.Document(
definitions=[
ast.TypeExtensionDefinition(
definition=ast.ObjectTypeDefinition(
name=ast.Name(value="Hello", loc=loc(13, 18)),
interfaces=[],
directives=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="world", loc=loc(23, 28)),
arguments=[],
type=ast.NamedType(
name=ast.Name(value="String", loc=loc(30, 36)),
loc=loc(30, 36),
),
directives=[],
loc=loc(23, 36),
)
],
loc=loc(8, 38),
),
loc=loc(1, 38),
)
],
loc=loc(1, 38),
)
assert doc == expected
def test_simple_non_null_type():
# type: () -> None
body = """
type Hello {
world: String!
}"""
doc = parse(body)
loc = create_loc_fn(body)
expected = ast.Document(
definitions=[
ast.ObjectTypeDefinition(
name=ast.Name(value="Hello", loc=loc(6, 11)),
interfaces=[],
directives=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="world", loc=loc(16, 21)),
arguments=[],
type=ast.NonNullType(
type=ast.NamedType(
name=ast.Name(value="String", loc=loc(23, 29)),
loc=loc(23, 29),
),
loc=loc(23, 30),
),
directives=[],
loc=loc(16, 30),
)
],
loc=loc(1, 32),
)
],
loc=loc(1, 32),
)
assert doc == expected
def test_parses_simple_type_inheriting_interface():
# type: () -> None
body = "type Hello implements World { }"
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.ObjectTypeDefinition(
name=ast.Name(value="Hello", loc=loc(5, 10)),
interfaces=[
ast.NamedType(
name=ast.Name(value="World", loc=loc(22, 27)), loc=loc(22, 27)
)
],
directives=[],
fields=[],
loc=loc(0, 31),
)
],
loc=loc(0, 31),
)
assert doc == expected
def test_parses_simple_type_inheriting_multiple_interfaces():
# type: () -> None
body = "type Hello implements Wo, rld { }"
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.ObjectTypeDefinition(
name=ast.Name(value="Hello", loc=loc(5, 10)),
interfaces=[
ast.NamedType(
name=ast.Name(value="Wo", loc=loc(22, 24)), loc=loc(22, 24)
),
ast.NamedType(
name=ast.Name(value="rld", loc=loc(26, 29)), loc=loc(26, 29)
),
],
directives=[],
fields=[],
loc=loc(0, 33),
)
],
loc=loc(0, 33),
)
assert doc == expected
def test_parses_single_value_enum():
# type: () -> None
body = "enum Hello { WORLD }"
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.EnumTypeDefinition(
name=ast.Name(value="Hello", loc=loc(5, 10)),
directives=[],
values=[
ast.EnumValueDefinition(
name=ast.Name(value="WORLD", loc=loc(13, 18)),
directives=[],
loc=loc(13, 18),
)
],
loc=loc(0, 20),
)
],
loc=loc(0, 20),
)
assert doc == expected
def test_parses_double_value_enum():
# type: () -> None
body = "enum Hello { WO, RLD }"
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.EnumTypeDefinition(
name=ast.Name(value="Hello", loc=loc(5, 10)),
directives=[],
values=[
ast.EnumValueDefinition(
name=ast.Name(value="WO", loc=loc(13, 15)),
directives=[],
loc=loc(13, 15),
),
ast.EnumValueDefinition(
name=ast.Name(value="RLD", loc=loc(17, 20)),
directives=[],
loc=loc(17, 20),
),
],
loc=loc(0, 22),
)
],
loc=loc(0, 22),
)
assert doc == expected
def test_parses_simple_interface():
# type: () -> None
body = """
interface Hello {
world: String
}
"""
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.InterfaceTypeDefinition(
name=ast.Name(value="Hello", loc=loc(11, 16)),
directives=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="world", loc=loc(21, 26)),
arguments=[],
type=ast.NamedType(
name=ast.Name(value="String", loc=loc(28, 34)),
loc=loc(28, 34),
),
directives=[],
loc=loc(21, 34),
)
],
loc=loc(1, 36),
)
],
loc=loc(1, 37),
)
assert doc == expected
def test_parses_simple_field_with_arg():
# type: () -> None
body = """
type Hello {
world(flag: Boolean): String
}"""
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.ObjectTypeDefinition(
name=ast.Name(value="Hello", loc=loc(6, 11)),
interfaces=[],
directives=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="world", loc=loc(16, 21)),
arguments=[
ast.InputValueDefinition(
name=ast.Name(value="flag", loc=loc(22, 26)),
type=ast.NamedType(
name=ast.Name(value="Boolean", loc=loc(28, 35)),
loc=loc(28, 35),
),
default_value=None,
directives=[],
loc=loc(22, 35),
)
],
type=ast.NamedType(
name=ast.Name(value="String", loc=loc(38, 44)),
loc=loc(38, 44),
),
directives=[],
loc=loc(16, 44),
)
],
loc=loc(1, 46),
)
],
loc=loc(1, 46),
)
assert doc == expected
def test_parses_simple_field_with_arg_with_default_value():
# type: () -> None
body = """
type Hello {
world(flag: Boolean = true): String
}"""
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.ObjectTypeDefinition(
name=ast.Name(value="Hello", loc=loc(6, 11)),
interfaces=[],
directives=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="world", loc=loc(16, 21)),
arguments=[
ast.InputValueDefinition(
name=ast.Name(value="flag", loc=loc(22, 26)),
type=ast.NamedType(
name=ast.Name(value="Boolean", loc=loc(28, 35)),
loc=loc(28, 35),
),
default_value=ast.BooleanValue(
value=True, loc=loc(38, 42)
),
directives=[],
loc=loc(22, 42),
)
],
type=ast.NamedType(
name=ast.Name(value="String", loc=loc(45, 51)),
loc=loc(45, 51),
),
directives=[],
loc=loc(16, 51),
)
],
loc=loc(1, 53),
)
],
loc=loc(1, 53),
)
assert doc == expected
def test_parses_simple_field_with_list_arg():
# type: () -> None
body = """
type Hello {
world(things: [String]): String
}"""
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.ObjectTypeDefinition(
name=ast.Name(value="Hello", loc=loc(6, 11)),
interfaces=[],
directives=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="world", loc=loc(16, 21)),
arguments=[
ast.InputValueDefinition(
name=ast.Name(value="things", loc=loc(22, 28)),
type=ast.ListType(
type=ast.NamedType(
name=ast.Name(value="String", loc=loc(31, 37)),
loc=loc(31, 37),
),
loc=loc(30, 38),
),
default_value=None,
directives=[],
loc=loc(22, 38),
)
],
type=ast.NamedType(
name=ast.Name(value="String", loc=loc(41, 47)),
loc=loc(41, 47),
),
directives=[],
loc=loc(16, 47),
)
],
loc=loc(1, 49),
)
],
loc=loc(1, 49),
)
assert doc == expected
def test_parses_simple_field_with_two_args():
# type: () -> None
body = """
type Hello {
world(argOne: Boolean, argTwo: Int): String
}"""
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.ObjectTypeDefinition(
name=ast.Name(value="Hello", loc=loc(6, 11)),
interfaces=[],
directives=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="world", loc=loc(16, 21)),
arguments=[
ast.InputValueDefinition(
name=ast.Name(value="argOne", loc=loc(22, 28)),
type=ast.NamedType(
name=ast.Name(value="Boolean", loc=loc(30, 37)),
loc=loc(30, 37),
),
default_value=None,
directives=[],
loc=loc(22, 37),
),
ast.InputValueDefinition(
name=ast.Name(value="argTwo", loc=loc(39, 45)),
type=ast.NamedType(
name=ast.Name(value="Int", loc=loc(47, 50)),
loc=loc(47, 50),
),
default_value=None,
directives=[],
loc=loc(39, 50),
),
],
type=ast.NamedType(
name=ast.Name(value="String", loc=loc(53, 59)),
loc=loc(53, 59),
),
directives=[],
loc=loc(16, 59),
)
],
loc=loc(1, 61),
)
],
loc=loc(1, 61),
)
assert doc == expected
def test_parses_simple_union():
# type: () -> None
body = "union Hello = World"
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.UnionTypeDefinition(
name=ast.Name(value="Hello", loc=loc(6, 11)),
directives=[],
types=[
ast.NamedType(
name=ast.Name(value="World", loc=loc(14, 19)), loc=loc(14, 19)
)
],
loc=loc(0, 19),
)
],
loc=loc(0, 19),
)
assert doc == expected
def test_parses_union_with_two_types():
# type: () -> None
body = "union Hello = Wo | Rld"
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.UnionTypeDefinition(
name=ast.Name(value="Hello", loc=loc(6, 11)),
directives=[],
types=[
ast.NamedType(
name=ast.Name(value="Wo", loc=loc(14, 16)), loc=loc(14, 16)
),
ast.NamedType(
name=ast.Name(value="Rld", loc=loc(19, 22)), loc=loc(19, 22)
),
],
loc=loc(0, 22),
)
],
loc=loc(0, 22),
)
assert doc == expected
def test_parses_scalar():
# type: () -> None
body = "scalar Hello"
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.ScalarTypeDefinition(
name=ast.Name(value="Hello", loc=loc(7, 12)),
directives=[],
loc=loc(0, 12),
)
],
loc=loc(0, 12),
)
assert doc == expected
def test_parses_simple_input_object():
# type: () -> None
body = """
input Hello {
world: String
}"""
loc = create_loc_fn(body)
doc = parse(body)
expected = ast.Document(
definitions=[
ast.InputObjectTypeDefinition(
name=ast.Name(value="Hello", loc=loc(7, 12)),
directives=[],
fields=[
ast.InputValueDefinition(
name=ast.Name(value="world", loc=loc(17, 22)),
type=ast.NamedType(
name=ast.Name(value="String", loc=loc(24, 30)),
loc=loc(24, 30),
),
default_value=None,
directives=[],
loc=loc(17, 30),
)
],
loc=loc(1, 32),
)
],
loc=loc(1, 32),
)
assert doc == expected
def test_parses_schema_files():
test_graphql_schemas_dir = os.path.join(os.path.dirname(os.path.realpath(__file__)), "graphql_schemas")
doc = parse(FileSource(test_graphql_schemas_dir))
expected = ast.Document(
definitions=[
ast.ObjectTypeDefinition(
name=ast.Name(value="Query"),
interfaces=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="person"),
arguments=[
ast.InputValueDefinition(
name=ast.Name(value="name"),
type=ast.NonNullType(
type=ast.NamedType(name=ast.Name(value="ID"))
),
default_value=None,
directives=[]
)
],
type=ast.NamedType(name=ast.Name(value="Person")),
directives=[]
),
ast.FieldDefinition(
name=ast.Name(value="skill"),
arguments=[
ast.InputValueDefinition(
name=ast.Name(value="name"),
type=ast.NonNullType(
type=ast.NamedType(name=ast.Name(value="ID"))
),
default_value=None,
directives=[]
)
],
type=ast.NamedType(name=ast.Name(value="Skill")),
directives=[]
)
],
directives=[]
),
ast.SchemaDefinition(
operation_types=[
ast.OperationTypeDefinition(
operation="query",
type=ast.NamedType(name=ast.Name(value="Query"))
)
],
directives=[]
),
ast.ObjectTypeDefinition(
name=ast.Name(value="Person"),
interfaces=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="name"),
arguments=[],
type=ast.NonNullType(
type=ast.NamedType(name=ast.Name(value="ID"))
),
directives=[]
),
ast.FieldDefinition(
name=ast.Name(value="age"),
arguments=[],
type=ast.NamedType(name=ast.Name(value="Int")),
directives=[]
)
],
directives=[]
),
ast.ObjectTypeDefinition(
name=ast.Name(value="Skill"),
interfaces=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="name"),
arguments=[],
type=ast.NonNullType(
type=ast.NamedType(name=ast.Name(value="ID"))
),
directives=[]
),
ast.FieldDefinition(
name=ast.Name(value="level"),
arguments=[],
type=ast.NamedType(name=ast.Name(value="Int")),
directives=[]
),
ast.FieldDefinition(
name=ast.Name(value="possessors"),
arguments=[],
type=ast.ListType(
type=ast.NonNullType(
type=ast.NamedType(name=ast.Name(value="Person"))
)
),
directives=[]
)
],
directives=[]
),
ast.TypeExtensionDefinition(
definition=ast.ObjectTypeDefinition(
name=ast.Name(value="Person"),
interfaces=[],
fields=[
ast.FieldDefinition(
name=ast.Name(value="skills"),
arguments=[],
type=ast.ListType(
type=ast.NonNullType(
type=ast.NamedType(name=ast.Name(value="Skill"))
)
),
directives=[]
)
],
directives=[]
)
)
]
)
assert doc == expected
def test_parsing_simple_input_object_with_args_should_fail():
# type: () -> None
body = """
input Hello {
world(foo: Int): String
}
"""
with raises(GraphQLSyntaxError) as excinfo:
parse(body)
assert "Syntax Error GraphQL (3:8) Expected :, found (" in excinfo.value.message