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import re
from pytest import raises
from ...types import Argument, Field, Int, List, NonNull, ObjectType, Schema, String
from ..connection import (
Connection,
ConnectionField,
PageInfo,
ConnectionOptions,
get_edge_class,
)
from ..node import Node
class MyObject(ObjectType):
class Meta:
interfaces = [Node]
field = String()
def test_connection():
class MyObjectConnection(Connection):
extra = String()
class Meta:
node = MyObject
class Edge:
other = String()
assert MyObjectConnection._meta.name == "MyObjectConnection"
fields = MyObjectConnection._meta.fields
assert list(fields) == ["page_info", "edges", "extra"]
edge_field = fields["edges"]
pageinfo_field = fields["page_info"]
assert isinstance(edge_field, Field)
assert isinstance(edge_field.type, NonNull)
assert isinstance(edge_field.type.of_type, List)
assert edge_field.type.of_type.of_type == MyObjectConnection.Edge
assert isinstance(pageinfo_field, Field)
assert isinstance(pageinfo_field.type, NonNull)
assert pageinfo_field.type.of_type == PageInfo
def test_connection_inherit_abstracttype():
class BaseConnection:
extra = String()
class MyObjectConnection(BaseConnection, Connection):
class Meta:
node = MyObject
assert MyObjectConnection._meta.name == "MyObjectConnection"
fields = MyObjectConnection._meta.fields
assert list(fields) == ["page_info", "edges", "extra"]
def test_connection_extra_abstract_fields():
class ConnectionWithNodes(Connection):
class Meta:
abstract = True
@classmethod
def __init_subclass_with_meta__(cls, node=None, name=None, **options):
_meta = ConnectionOptions(cls)
_meta.fields = {
"nodes": Field(
NonNull(List(node)),
description="Contains all the nodes in this connection.",
),
}
return super(ConnectionWithNodes, cls).__init_subclass_with_meta__(
node=node, name=name, _meta=_meta, **options
)
class MyObjectConnection(ConnectionWithNodes):
class Meta:
node = MyObject
class Edge:
other = String()
assert MyObjectConnection._meta.name == "MyObjectConnection"
fields = MyObjectConnection._meta.fields
assert list(fields) == ["nodes", "page_info", "edges"]
edge_field = fields["edges"]
pageinfo_field = fields["page_info"]
nodes_field = fields["nodes"]
assert isinstance(edge_field, Field)
assert isinstance(edge_field.type, NonNull)
assert isinstance(edge_field.type.of_type, List)
assert edge_field.type.of_type.of_type == MyObjectConnection.Edge
assert isinstance(pageinfo_field, Field)
assert isinstance(pageinfo_field.type, NonNull)
assert pageinfo_field.type.of_type == PageInfo
assert isinstance(nodes_field, Field)
assert isinstance(nodes_field.type, NonNull)
assert isinstance(nodes_field.type.of_type, List)
assert nodes_field.type.of_type.of_type == MyObject
def test_connection_override_fields():
class ConnectionWithNodes(Connection):
class Meta:
abstract = True
@classmethod
def __init_subclass_with_meta__(cls, node=None, name=None, **options):
_meta = ConnectionOptions(cls)
base_name = (
re.sub("Connection$", "", name or cls.__name__) or node._meta.name
)
edge_class = get_edge_class(cls, node, base_name)
_meta.fields = {
"page_info": Field(
NonNull(
PageInfo,
name="pageInfo",
required=True,
description="Pagination data for this connection.",
)
),
"edges": Field(
NonNull(List(NonNull(edge_class))),
description="Contains the nodes in this connection.",
),
}
return super(ConnectionWithNodes, cls).__init_subclass_with_meta__(
node=node, name=name, _meta=_meta, **options
)
class MyObjectConnection(ConnectionWithNodes):
class Meta:
node = MyObject
assert MyObjectConnection._meta.name == "MyObjectConnection"
fields = MyObjectConnection._meta.fields
assert list(fields) == ["page_info", "edges"]
edge_field = fields["edges"]
pageinfo_field = fields["page_info"]
assert isinstance(edge_field, Field)
assert isinstance(edge_field.type, NonNull)
assert isinstance(edge_field.type.of_type, List)
assert isinstance(edge_field.type.of_type.of_type, NonNull)
assert edge_field.type.of_type.of_type.of_type.__name__ == "MyObjectEdge"
# This page info is NonNull
assert isinstance(pageinfo_field, Field)
assert isinstance(edge_field.type, NonNull)
assert pageinfo_field.type.of_type == PageInfo
def test_connection_name():
custom_name = "MyObjectCustomNameConnection"
class BaseConnection:
extra = String()
class MyObjectConnection(BaseConnection, Connection):
class Meta:
node = MyObject
name = custom_name
assert MyObjectConnection._meta.name == custom_name
def test_edge():
class MyObjectConnection(Connection):
class Meta:
node = MyObject
class Edge:
other = String()
Edge = MyObjectConnection.Edge
assert Edge._meta.name == "MyObjectEdge"
edge_fields = Edge._meta.fields
assert list(edge_fields) == ["node", "cursor", "other"]
assert isinstance(edge_fields["node"], Field)
assert edge_fields["node"].type == MyObject
assert isinstance(edge_fields["other"], Field)
assert edge_fields["other"].type == String
def test_edge_with_bases():
class BaseEdge:
extra = String()
class MyObjectConnection(Connection):
class Meta:
node = MyObject
class Edge(BaseEdge):
other = String()
Edge = MyObjectConnection.Edge
assert Edge._meta.name == "MyObjectEdge"
edge_fields = Edge._meta.fields
assert list(edge_fields) == ["node", "cursor", "extra", "other"]
assert isinstance(edge_fields["node"], Field)
assert edge_fields["node"].type == MyObject
assert isinstance(edge_fields["other"], Field)
assert edge_fields["other"].type == String
def test_edge_with_nonnull_node():
class MyObjectConnection(Connection):
class Meta:
node = NonNull(MyObject)
edge_fields = MyObjectConnection.Edge._meta.fields
assert isinstance(edge_fields["node"], Field)
assert isinstance(edge_fields["node"].type, NonNull)
assert edge_fields["node"].type.of_type == MyObject
def test_pageinfo():
assert PageInfo._meta.name == "PageInfo"
fields = PageInfo._meta.fields
assert list(fields) == [
"has_next_page",
"has_previous_page",
"start_cursor",
"end_cursor",
]
def test_connectionfield():
class MyObjectConnection(Connection):
class Meta:
node = MyObject
field = ConnectionField(MyObjectConnection)
assert field.args == {
"before": Argument(String),
"after": Argument(String),
"first": Argument(Int),
"last": Argument(Int),
}
def test_connectionfield_node_deprecated():
field = ConnectionField(MyObject)
with raises(Exception) as exc_info:
field.type
assert "ConnectionFields now need a explicit ConnectionType for Nodes." in str(
exc_info.value
)
def test_connectionfield_custom_args():
class MyObjectConnection(Connection):
class Meta:
node = MyObject
field = ConnectionField(
MyObjectConnection, before=String(required=True), extra=String()
)
assert field.args == {
"before": Argument(NonNull(String)),
"after": Argument(String),
"first": Argument(Int),
"last": Argument(Int),
"extra": Argument(String),
}
def test_connectionfield_required():
class MyObjectConnection(Connection):
class Meta:
node = MyObject
class Query(ObjectType):
test_connection = ConnectionField(MyObjectConnection, required=True)
def resolve_test_connection(root, info, **args):
return []
schema = Schema(query=Query)
executed = schema.execute("{ testConnection { edges { cursor } } }")
assert not executed.errors
assert executed.data == {"testConnection": {"edges": []}}
def test_connectionfield_strict_types():
class MyObjectConnection(Connection):
class Meta:
node = MyObject
strict_types = True
connection_field = ConnectionField(MyObjectConnection)
edges_field_type = connection_field.type._meta.fields["edges"].type
assert isinstance(edges_field_type, NonNull)
edges_list_element_type = edges_field_type.of_type.of_type
assert isinstance(edges_list_element_type, NonNull)
node_field = edges_list_element_type.of_type._meta.fields["node"]
assert isinstance(node_field.type, NonNull)
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