Add typechecking for 'file_storage', 'files' test folders (#101)

* add typechecking for 'file_storage', 'files' test folders

* fix File class annotations

django-stubs/core/files/base.pyi

@@ -1,12 +1,13 @@
 from io import StringIO
-from typing import Any, Iterator, Optional, Union
+from typing import Any, Iterator, Optional, Union, IO, Type
+from types import TracebackType
 
 from django.core.files.utils import FileProxyMixin
 
-class File(FileProxyMixin):
+class File(FileProxyMixin, IO[Any]):
     DEFAULT_CHUNK_SIZE: Any = ...
     file: StringIO = ...
-    name: Optional[str] = ...
+    name: str = ...
     mode: str = ...
     def __init__(self, file: Any, name: Optional[str] = ...) -> None: ...
     def __bool__(self) -> bool: ...
@@ -15,8 +16,11 @@ class File(FileProxyMixin):
     def chunks(self, chunk_size: Optional[int] = ...) -> Iterator[Union[bytes, bytearray]]: ...
     def multiple_chunks(self, chunk_size: Optional[Any] = ...): ...
     def __iter__(self) -> Iterator[Union[bytes, str]]: ...
+    def __next__(self) -> Union[bytes, str]: ...
     def __enter__(self) -> File: ...
-    def __exit__(self, exc_type: None, exc_value: None, tb: None) -> None: ...
+    def __exit__(
+        self, exc_type: Optional[Type[BaseException]], exc_value: Optional[BaseException], tb: Optional[TracebackType]
+    ) -> bool: ...
     def open(self, mode: Optional[str] = ...) -> File: ...
     def close(self) -> None: ...
 

django-stubs/core/files/images.pyi

@@ -1,5 +1,4 @@
-from io import BytesIO
-from typing import Any, Union
+from typing import Any, IO, Union
 
 from django.core.files import File
 
@@ -11,4 +10,4 @@ class ImageFile(File):
     @property
     def height(self) -> int: ...
 
-def get_image_dimensions(file_or_path: Union[BytesIO, str], close: bool = ...) -> Any: ...
+def get_image_dimensions(file_or_path: Union[str, IO[bytes]], close: bool = ...) -> Any: ...

django-stubs/core/files/storage.pyi

@@ -1,5 +1,5 @@
 from datetime import datetime
-from typing import Any, IO, List, Optional, Tuple
+from typing import Any, List, Optional, Tuple, IO
 
 from django.core.files.base import File
 from django.utils.functional import LazyObject

scripts/typecheck_tests.py

@@ -61,6 +61,8 @@ IGNORED_ERRORS = {
         + 'expected "Union[str, bytes, bytearray]"',
         'Incompatible types in assignment (expression has type "None", variable has type Module)',
         'note:',
+        'undefined in superclass',
+        '**Dict'
     ],
     'admin_scripts': [
         'Incompatible types in assignment (expression has type "Callable['
@@ -76,7 +78,6 @@ IGNORED_ERRORS = {
         '"object" not callable',
     ],
     'aggregation': [
-        '"as_sql" undefined in superclass',
         'Incompatible type for "contact" of "Book" (got "Optional[Author]", expected "Union[Author, Combinable]")',
         'Incompatible type for "publisher" of "Book" (got "Optional[Publisher]", '
         + 'expected "Union[Publisher, Combinable]")'
@@ -114,16 +115,18 @@ IGNORED_ERRORS = {
     'dispatch': [
         'Argument 1 to "connect" of "Signal" has incompatible type "object"; expected "Callable[..., Any]"'
     ],
-    'deprecation': [
-        re.compile('"(old|new)" undefined in superclass')
-    ],
     'db_functions': [
         'for **',
         'expected "float"',
         'Incompatible types in assignment (expression has type "Optional[FloatModel]", variable has type "FloatModel")'
     ],
-    'file_uploads': [
-        '"handle_uncaught_exception" undefined in superclass'
+    'file_storage': [
+        'Incompatible types in assignment (expression has type "Callable[[], Any]"'
+    ],
+    'files': [
+        '"file_move_safe" does not return a value',
+        'Argument 1 to "unlink" has incompatible type "Optional[str]"; expected "Union[bytes, str, _PathLike[Any]]"',
+        'Incompatible types in assignment (expression has type "IOBase", variable has type "File")'
     ],
     'fixtures': [
         'Incompatible types in assignment (expression has type "int", target has type "Iterable[str]")'
@@ -132,7 +135,6 @@ IGNORED_ERRORS = {
         'List item 0 has incompatible type "Jinja2"; expected "DjangoTemplates"',
         'Not enough arguments for format string',
         'Argument after ** must be a mapping, not "object"',
-        '"media" undefined in superclass',
         'expression has type "None", base class "TestFormParent"',
         'variable has type "SongForm"',
         '"full_clean" of "BaseForm" does not return a value',
@@ -158,16 +160,9 @@ IGNORED_ERRORS = {
         + 'expected "Union[Type[<nothing>], QuerySet[<nothing>, <nothing>]]"',
         'CustomClass'
     ],
-    'get_or_create': [
-        'Argument 1 to "update_or_create" of "QuerySet" has incompatible type "**Dict[str, object]"; '
-        + 'expected "Optional[MutableMapping[str, Any]]"'
-    ],
     'humanize_tests': [
         'Argument 1 to "append" of "list" has incompatible type "None"; expected "str"'
     ],
-    'logging_tests': [
-        re.compile('"(setUpClass|tearDownClass)" undefined in superclass')
-    ],
     'lookup': [
         'Unexpected keyword argument "headline__startswith" for "in_bulk" of "QuerySet"',
     ],
@@ -385,9 +380,9 @@ TESTS_DIRS = [
     'field_deconstruction',
     'field_defaults',
     'field_subclassing',
-    # TODO: 'file_storage',
+    'file_storage',
     'file_uploads',
-    # TODO: 'files',
+    'files',
     'filtered_relation',
     'fixtures',
     'fixtures_model_package',