gh-157242: Fix test_capi on Py_TRACE_REFS build

Mark tests using set_nomemory() with @support.nomemtest to skip these
tests on a Py_TRACE_REFS build.

Author: vstinner

Lib/test/test_bytes.py

@@ -1569,6 +1569,7 @@ def test_resize(self):
         self.assertRaises(MemoryError, bytearray().resize, sys.maxsize)
         self.assertRaises(MemoryError, bytearray(1000).resize, sys.maxsize)
 
+    @support.nomemtest
     def test_resize_error(self):
         # gh-157242: If bytearray.resize() fails (MemoryError),
         # the bytearray must be left unchanged.
@@ -1662,6 +1663,7 @@ def test_take_bytes(self):
         self.assertEqual(ba, bytearray(b'A'))
         self.assertEqual(ord(b'c'), ord('c'))
 
+    @support.nomemtest
     def test_take_bytes_error(self):
         # gh-157242: If bytearray.take_bytes() fails (MemoryError),
         # the bytearray must be left unchanged.

Lib/test/test_capi/test_bytes.py

@@ -1,5 +1,6 @@
 import sys
 import unittest
+from test import support
 from test.support import import_helper
 
 _testlimitedcapi = import_helper.import_module('_testlimitedcapi')
@@ -389,6 +390,7 @@ def test_resize(self):
         writer.resize(len(b'number=123456'), b'456')
         self.assertEqual(writer.finish(), self.result_type(b'number=123456'))
 
+    @support.nomemtest
     def test_resize_error(self):
         small_buffer = _testcapi.PyBytesWriter_small_buffer
         init = b'x' * (small_buffer * 2)
@@ -464,6 +466,10 @@ def test_example_resize(self):
     def test_example_highlevel(self):
         self.assertEqual(_testcapi.byteswriter_highlevel(), b'Hello World!')
 
+    @support.nomemtest
+    def test_bytes_resize_tracer(self):
+        _testcapi._test_bytes_resize_tracer()
+
 
 class ByteArrayWriterTest(BaseWriterTest, unittest.TestCase):
     result_type = bytearray

Modules/_testcapi/mem.c

@@ -943,7 +943,7 @@ check_bytes_resize_tracer(int no_memory)
 
 
 static PyObject*
-test_bytes_resize_tracer(PyObject *self, PyObject *Py_UNUSED(ignored))
+_test_bytes_resize_tracer(PyObject *self, PyObject *Py_UNUSED(ignored))
 {
     if (check_bytes_resize_tracer(0) < 0) {
         return NULL;
@@ -972,7 +972,7 @@ static PyMethodDef test_methods[] = {
 #if TARGET_OS_OSX || defined(__FreeBSD__)
     {"get_process_memory_usage",      get_process_memory_usage,      METH_VARARGS},
 #endif
-    {"test_bytes_resize_tracer",      test_bytes_resize_tracer,      METH_NOARGS},
+    {"_test_bytes_resize_tracer",      _test_bytes_resize_tracer,      METH_NOARGS},
 
     // Tracemalloc tests
     {"tracemalloc_track",             tracemalloc_track,             METH_VARARGS},