Re-organize directory structure (#4971)

See discussion in #2491

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stdlib/unittest/result.pyi

@@ -0,0 +1,41 @@
+import unittest.case
+from types import TracebackType
+from typing import Any, Callable, List, Optional, TextIO, Tuple, Type, TypeVar, Union
+
+_SysExcInfoType = Union[Tuple[Type[BaseException], BaseException, TracebackType], Tuple[None, None, None]]
+
+_F = TypeVar("_F", bound=Callable[..., Any])
+
+# undocumented
+def failfast(method: _F) -> _F: ...
+
+class TestResult:
+    errors: List[Tuple[unittest.case.TestCase, str]]
+    failures: List[Tuple[unittest.case.TestCase, str]]
+    skipped: List[Tuple[unittest.case.TestCase, str]]
+    expectedFailures: List[Tuple[unittest.case.TestCase, str]]
+    unexpectedSuccesses: List[unittest.case.TestCase]
+    shouldStop: bool
+    testsRun: int
+    buffer: bool
+    failfast: bool
+    tb_locals: bool
+    def __init__(
+        self, stream: Optional[TextIO] = ..., descriptions: Optional[bool] = ..., verbosity: Optional[int] = ...
+    ) -> None: ...
+    def printErrors(self) -> None: ...
+    def wasSuccessful(self) -> bool: ...
+    def stop(self) -> None: ...
+    def startTest(self, test: unittest.case.TestCase) -> None: ...
+    def stopTest(self, test: unittest.case.TestCase) -> None: ...
+    def startTestRun(self) -> None: ...
+    def stopTestRun(self) -> None: ...
+    def addError(self, test: unittest.case.TestCase, err: _SysExcInfoType) -> None: ...
+    def addFailure(self, test: unittest.case.TestCase, err: _SysExcInfoType) -> None: ...
+    def addSuccess(self, test: unittest.case.TestCase) -> None: ...
+    def addSkip(self, test: unittest.case.TestCase, reason: str) -> None: ...
+    def addExpectedFailure(self, test: unittest.case.TestCase, err: _SysExcInfoType) -> None: ...
+    def addUnexpectedSuccess(self, test: unittest.case.TestCase) -> None: ...
+    def addSubTest(
+        self, test: unittest.case.TestCase, subtest: unittest.case.TestCase, err: Optional[_SysExcInfoType]
+    ) -> None: ...