[3.12] gh-108416: Mark slow test methods with @requires_resource('cpu') (GH-108421) (#108798)

gh-108416: Mark slow test methods with @requires_resource('cpu') (GH-108421)

Only mark tests which spend significant system or user time,
by itself or in subprocesses.
(cherry picked from commit f3ba0a7)

Co-authored-by: Serhiy Storchaka <[email protected]>

Author: miss-islington

Lib/test/_test_multiprocessing.py

@@ -329,6 +329,7 @@ def test_set_executable(self):
             p.join()
             self.assertEqual(p.exitcode, 0)
 
+    @support.requires_resource('cpu')
     def test_args_argument(self):
         # bpo-45735: Using list or tuple as *args* in constructor could
         # achieve the same effect.
@@ -4466,6 +4467,7 @@ def test_finalize(self):
         result = [obj for obj in iter(conn.recv, 'STOP')]
         self.assertEqual(result, ['a', 'b', 'd10', 'd03', 'd02', 'd01', 'e'])
 
+    @support.requires_resource('cpu')
     def test_thread_safety(self):
         # bpo-24484: _run_finalizers() should be thread-safe
         def cb():

Lib/test/pickletester.py

@@ -2576,6 +2576,7 @@ def check_frame_opcodes(self, pickled):
             self.assertLess(pos - frameless_start, self.FRAME_SIZE_MIN)
 
     @support.skip_if_pgo_task
+    @support.requires_resource('cpu')
     def test_framing_many_objects(self):
         obj = list(range(10**5))
         for proto in range(4, pickle.HIGHEST_PROTOCOL + 1):

Lib/test/test_ast.py

@@ -1999,6 +1999,7 @@ def test_nameconstant(self):
             'ast.NameConstant is deprecated and will be removed in Python 3.14; use ast.Constant instead',
         ])
 
+    @support.requires_resource('cpu')
     def test_stdlib_validates(self):
         stdlib = os.path.dirname(ast.__file__)
         tests = [fn for fn in os.listdir(stdlib) if fn.endswith(".py")]

Lib/test/test_buffer.py

@@ -1028,6 +1028,7 @@ def match(req, flag):
                     ndim=ndim, shape=shape, strides=strides,
                     lst=lst, sliced=sliced)
 
+    @support.requires_resource('cpu')
     def test_ndarray_getbuf(self):
         requests = (
             # distinct flags
@@ -2759,6 +2760,7 @@ def iter_roundtrip(ex, m, items, fmt):
             m = memoryview(ex)
             iter_roundtrip(ex, m, items, fmt)
 
+    @support.requires_resource('cpu')
     def test_memoryview_cast_1D_ND(self):
         # Cast between C-contiguous buffers. At least one buffer must
         # be 1D, at least one format must be 'c', 'b' or 'B'.

Lib/test/test_builtin.py

@@ -927,6 +927,7 @@ def test_filter_pickle(self):
             f2 = filter(filter_char, "abcdeabcde")
             self.check_iter_pickle(f1, list(f2), proto)
 
+    @support.requires_resource('cpu')
     def test_filter_dealloc(self):
         # Tests recursive deallocation of nested filter objects using the
         # thrashcan mechanism. See gh-102356 for more details.

Lib/test/test_compile.py

@@ -784,6 +784,7 @@ def test_path_like_objects(self):
         # An implicit test for PyUnicode_FSDecoder().
         compile("42", FakePath("test_compile_pathlike"), "single")
 
+    @support.requires_resource('cpu')
     def test_stack_overflow(self):
         # bpo-31113: Stack overflow when compile a long sequence of
         # complex statements.

Lib/test/test_compileall.py

@@ -551,6 +551,7 @@ def test_no_args_compiles_path(self):
             self.assertNotCompiled(self.barfn)
 
     @without_source_date_epoch  # timestamp invalidation test
+    @support.requires_resource('cpu')
     def test_no_args_respects_force_flag(self):
         bazfn = script_helper.make_script(self.directory, 'baz', '')
         with self.temporary_pycache_prefix() as env:
@@ -568,6 +569,7 @@ def test_no_args_respects_force_flag(self):
         mtime2 = os.stat(pycpath).st_mtime
         self.assertNotEqual(mtime, mtime2)
 
+    @support.requires_resource('cpu')
     def test_no_args_respects_quiet_flag(self):
         script_helper.make_script(self.directory, 'baz', '')
         with self.temporary_pycache_prefix() as env:

Lib/test/test_concurrent_futures/test_thread_pool.py

@@ -6,6 +6,7 @@
 import threading
 import unittest
 from concurrent import futures
+from test import support
 
 from .executor import ExecutorTest, mul
 from .util import BaseTestCase, ThreadPoolMixin, setup_module
@@ -49,6 +50,7 @@ def test_idle_thread_reuse(self):
         executor.shutdown(wait=True)
 
     @unittest.skipUnless(hasattr(os, 'register_at_fork'), 'need os.register_at_fork')
+    @support.requires_resource('cpu')
     def test_hang_global_shutdown_lock(self):
         # bpo-45021: _global_shutdown_lock should be reinitialized in the child
         # process, otherwise it will never exit

Lib/test/test_context.py

@@ -6,6 +6,7 @@
 import time
 import unittest
 import weakref
+from test import support
 from test.support import threading_helper
 
 try:
@@ -570,6 +571,7 @@ def test_hamt_collision_3(self):
 
         self.assertEqual({k.name for k in h.keys()}, {'C', 'D', 'E'})
 
+    @support.requires_resource('cpu')
     def test_hamt_stress(self):
         COLLECTION_SIZE = 7000
         TEST_ITERS_EVERY = 647

Lib/test/test_cppext/__init__.py

@@ -17,9 +17,11 @@
 
 @support.requires_subprocess()
 class TestCPPExt(unittest.TestCase):
+    @support.requires_resource('cpu')
     def test_build_cpp11(self):
         self.check_build(False, '_testcpp11ext')
 
+    @support.requires_resource('cpu')
     def test_build_cpp03(self):
         self.check_build(True, '_testcpp03ext')