sort out all test folders into passable and TODOs

django-stubs/core/cache/backends/base.pyi

@@ -21,7 +21,7 @@ class BaseCache:
     def get_backend_timeout(self, timeout: Any = ...) -> Optional[float]: ...
     def make_key(self, key: Union[int, str], version: Optional[Union[int, str]] = ...) -> str: ...
     def add(self, key: Any, value: Any, timeout: Any = ..., version: Optional[Any] = ...) -> None: ...
-    def get(self, key: Any, default: Optional[Any] = ..., version: Optional[Any] = ...) -> None: ...
+    def get(self, key: Any, default: Optional[Any] = ..., version: Optional[Any] = ...) -> Any: ...
     def set(self, key: Any, value: Any, timeout: Any = ..., version: Optional[Any] = ...) -> None: ...
     def touch(self, key: Any, timeout: Any = ..., version: Optional[Any] = ...) -> None: ...
     def delete(self, key: Any, version: Optional[Any] = ...) -> None: ...

django-stubs/core/paginator.pyi

@@ -1,4 +1,4 @@
-from typing import Dict, List, Optional, Union, Iterable, Sequence
+from typing import Dict, List, Optional, Union, Iterable, Sequence, Protocol, Any
 
 from django.db.models.base import Model
 from django.db.models.query import QuerySet
@@ -8,13 +8,23 @@ class InvalidPage(Exception): ...
 class PageNotAnInteger(InvalidPage): ...
 class EmptyPage(InvalidPage): ...
 
+class SupportsLen(Protocol):
+    def __len__(self) -> int: ...
+
+class SupportsCount(Protocol):
+    def count(self) -> int: ...
+
 class Paginator:
     object_list: QuerySet = ...
     per_page: int = ...
     orphans: int = ...
     allow_empty_first_page: bool = ...
     def __init__(
-        self, object_list: Iterable, per_page: Union[int, str], orphans: int = ..., allow_empty_first_page: bool = ...
+        self,
+        object_list: Union[SupportsLen, SupportsCount],
+        per_page: Union[int, str],
+        orphans: int = ...,
+        allow_empty_first_page: bool = ...,
     ) -> None: ...
     def validate_number(self, number: Optional[Union[float, str]]) -> int: ...
     def get_page(self, number: Optional[int]) -> Page: ...

django-stubs/core/serializers/__init__.pyi

@@ -2,10 +2,18 @@ from collections import OrderedDict
 from typing import Any, Callable, Dict, Iterator, List, Optional, Tuple, Type, Union
 
 from django.apps.config import AppConfig
-from django.core.serializers.base import Serializer, Deserializer
 from django.db.models.base import Model
 from django.db.models.query import QuerySet
 
+from .base import (
+    Serializer as Serializer,
+    Deserializer as Deserializer,
+    SerializerDoesNotExist as SerializerDoesNotExist,
+    SerializationError as SerializationError,
+    DeserializationError as DeserializationError,
+    M2MDeserializationError as M2MDeserializationError,
+)
+
 BUILTIN_SERIALIZERS: Any
 
 class BadSerializer: