gh-114099: Add test exclusions to support running the test suite on iOS (#114889)

Add test annotations required to run the test suite on iOS (PEP 730).

The majority of the change involve annotating tests that use subprocess,
but are skipped on Emscripten/WASI for other reasons, and including
iOS/tvOS/watchOS under the same umbrella as macOS/darwin checks.

`is_apple` and `is_apple_mobile` test helpers have been added to
identify *any* Apple platform, and "any Apple platform except macOS",
respectively.

4 files changed, 19 insertions, 2 deletions

diff --git a/Lib/test/test_asyncio/test_events.py b/Lib/test/test_asyncio/test_events.py
index b25c097..c92c88b 100644
--- a/Lib/test/test_asyncio/test_events.py
+++ b/Lib/test/test_asyncio/test_events.py
@@ -1815,6 +1815,7 @@ class SubprocessTestsMixin:
         else:
             self.assertEqual(-signal.SIGKILL, returncode)
 
+    @support.requires_subprocess()
     def test_subprocess_exec(self):
         prog = os.path.join(os.path.dirname(__file__), 'echo.py')
 
@@ -1836,6 +1837,7 @@ class SubprocessTestsMixin:
         self.check_killed(proto.returncode)
         self.assertEqual(b'Python The Winner', proto.data[1])
 
+    @support.requires_subprocess()
     def test_subprocess_interactive(self):
         prog = os.path.join(os.path.dirname(__file__), 'echo.py')
 
@@ -1863,6 +1865,7 @@ class SubprocessTestsMixin:
         self.loop.run_until_complete(proto.completed)
         self.check_killed(proto.returncode)
 
+    @support.requires_subprocess()
     def test_subprocess_shell(self):
         connect = self.loop.subprocess_shell(
                         functools.partial(MySubprocessProtocol, self.loop),
@@ -1879,6 +1882,7 @@ class SubprocessTestsMixin:
         self.assertEqual(proto.data[2], b'')
         transp.close()
 
+    @support.requires_subprocess()
     def test_subprocess_exitcode(self):
         connect = self.loop.subprocess_shell(
                         functools.partial(MySubprocessProtocol, self.loop),
@@ -1890,6 +1894,7 @@ class SubprocessTestsMixin:
         self.assertEqual(7, proto.returncode)
         transp.close()
 
+    @support.requires_subprocess()
     def test_subprocess_close_after_finish(self):
         connect = self.loop.subprocess_shell(
                         functools.partial(MySubprocessProtocol, self.loop),
@@ -1904,6 +1909,7 @@ class SubprocessTestsMixin:
         self.assertEqual(7, proto.returncode)
         self.assertIsNone(transp.close())
 
+    @support.requires_subprocess()
     def test_subprocess_kill(self):
         prog = os.path.join(os.path.dirname(__file__), 'echo.py')
 
@@ -1920,6 +1926,7 @@ class SubprocessTestsMixin:
         self.check_killed(proto.returncode)
         transp.close()
 
+    @support.requires_subprocess()
     def test_subprocess_terminate(self):
         prog = os.path.join(os.path.dirname(__file__), 'echo.py')
 
@@ -1937,6 +1944,7 @@ class SubprocessTestsMixin:
         transp.close()
 
     @unittest.skipIf(sys.platform == 'win32', "Don't have SIGHUP")
+    @support.requires_subprocess()
     def test_subprocess_send_signal(self):
         # bpo-31034: Make sure that we get the default signal handler (killing
         # the process). The parent process may have decided to ignore SIGHUP,
@@ -1961,6 +1969,7 @@ class SubprocessTestsMixin:
         finally:
             signal.signal(signal.SIGHUP, old_handler)
 
+    @support.requires_subprocess()
     def test_subprocess_stderr(self):
         prog = os.path.join(os.path.dirname(__file__), 'echo2.py')
 
@@ -1982,6 +1991,7 @@ class SubprocessTestsMixin:
         self.assertTrue(proto.data[2].startswith(b'ERR:test'), proto.data[2])
         self.assertEqual(0, proto.returncode)
 
+    @support.requires_subprocess()
     def test_subprocess_stderr_redirect_to_stdout(self):
         prog = os.path.join(os.path.dirname(__file__), 'echo2.py')
 
@@ -2007,6 +2017,7 @@ class SubprocessTestsMixin:
         transp.close()
         self.assertEqual(0, proto.returncode)
 
+    @support.requires_subprocess()
     def test_subprocess_close_client_stream(self):
         prog = os.path.join(os.path.dirname(__file__), 'echo3.py')
 
@@ -2041,6 +2052,7 @@ class SubprocessTestsMixin:
         self.loop.run_until_complete(proto.completed)
         self.check_killed(proto.returncode)
 
+    @support.requires_subprocess()
     def test_subprocess_wait_no_same_group(self):
         # start the new process in a new session
         connect = self.loop.subprocess_shell(
@@ -2053,6 +2065,7 @@ class SubprocessTestsMixin:
         self.assertEqual(7, proto.returncode)
         transp.close()
 
+    @support.requires_subprocess()
     def test_subprocess_exec_invalid_args(self):
         async def connect(**kwds):
             await self.loop.subprocess_exec(
@@ -2066,6 +2079,7 @@ class SubprocessTestsMixin:
         with self.assertRaises(ValueError):
             self.loop.run_until_complete(connect(shell=True))
 
+    @support.requires_subprocess()
     def test_subprocess_shell_invalid_args(self):
 
         async def connect(cmd=None, **kwds):
diff --git a/Lib/test/test_asyncio/test_streams.py b/Lib/test/test_asyncio/test_streams.py
index 3c8cc5f..2109905 100644
--- a/Lib/test/test_asyncio/test_streams.py
+++ b/Lib/test/test_asyncio/test_streams.py
@@ -10,7 +10,6 @@ import threading
 import unittest
 from unittest import mock
 import warnings
-from test.support import socket_helper
 try:
     import ssl
 except ImportError:
@@ -18,6 +17,7 @@ except ImportError:
 
 import asyncio
 from test.test_asyncio import utils as test_utils
+from test.support import requires_subprocess, socket_helper
 
 
 def tearDownModule():
@@ -770,6 +770,7 @@ class StreamTests(test_utils.TestCase):
         self.assertEqual(msg2, b"hello world 2!\n")
 
     @unittest.skipIf(sys.platform == 'win32', "Don't have pipes")
+    @requires_subprocess()
     def test_read_all_from_pipe_reader(self):
         # See asyncio issue 168.  This test is derived from the example
         # subprocess_attach_read_pipe.py, but we configure the
diff --git a/Lib/test/test_asyncio/test_subprocess.py b/Lib/test/test_asyncio/test_subprocess.py
index 808b21c..f50a9eb 100644
--- a/Lib/test/test_asyncio/test_subprocess.py
+++ b/Lib/test/test_asyncio/test_subprocess.py
@@ -47,6 +47,7 @@ class TestSubprocessTransport(base_subprocess.BaseSubprocessTransport):
         self._proc.pid = -1
 
 
+@support.requires_subprocess()
 class SubprocessTransportTests(test_utils.TestCase):
     def setUp(self):
         super().setUp()
@@ -110,6 +111,7 @@ class SubprocessTransportTests(test_utils.TestCase):
         transport.close()
 
 
+@support.requires_subprocess()
 class SubprocessMixin:
 
     def test_stdin_stdout(self):
diff --git a/Lib/test/test_asyncio/test_unix_events.py b/Lib/test/test_asyncio/test_unix_events.py
index d2c8cba..59ef9f5 100644
--- a/Lib/test/test_asyncio/test_unix_events.py
+++ b/Lib/test/test_asyncio/test_unix_events.py
@@ -1874,7 +1874,7 @@ class TestFunctional(unittest.TestCase):
             wsock.close()
 
 
-@unittest.skipUnless(hasattr(os, 'fork'), 'requires os.fork()')
+@support.requires_fork()
 class TestFork(unittest.IsolatedAsyncioTestCase):
 
     async def test_fork_not_share_event_loop(self):