bpo-36346: Make using the legacy Unicode C API optional (GH-21437)

Add compile time option USE_UNICODE_WCHAR_CACHE. Setting it to 0
makes the interpreter not using the wchar_t cache and the legacy Unicode C API.

1 files changed, 4 insertions, 1 deletions

diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
index 716e6eb..9dbae44 100644
--- a/Lib/test/test_decimal.py
+++ b/Lib/test/test_decimal.py
@@ -33,7 +33,8 @@ import unittest
 import numbers
 import locale
 from test.support import (run_unittest, run_doctest, is_resource_enabled,
-                          requires_IEEE_754, requires_docstrings)
+                          requires_IEEE_754, requires_docstrings,
+                          requires_legacy_unicode_capi)
 from test.support import (TestFailed,
                           run_with_locale, cpython_only)
 from test.support.import_helper import import_fresh_module
@@ -582,6 +583,7 @@ class ExplicitConstructionTest(unittest.TestCase):
             self.assertRaises(InvalidOperation, Decimal, "1_2_\u00003")
 
     @cpython_only
+    @requires_legacy_unicode_capi
     def test_from_legacy_strings(self):
         import _testcapi
         Decimal = self.decimal.Decimal
@@ -2817,6 +2819,7 @@ class ContextAPItests(unittest.TestCase):
                                               Overflow])
 
     @cpython_only
+    @requires_legacy_unicode_capi
     def test_from_legacy_strings(self):
         import _testcapi
         c = self.decimal.Context()