[3.10] bpo-43988: Add test.support.check_disallow_instantiation() (GH-25757) (GH-26885)



(cherry picked from commit 4f725261c6cf23d259e8fdc205e12b76ef4d2d31, fbff5387c3e1f3904420fa5a27738c6c5881305b, and 8cec740820fc875117bfa7b6bdb10202ebeb8fd5)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

Automerge-Triggered-By: GH:vstinner
diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py
index 694ef6e..cb06108 100644
--- a/Lib/test/test_zlib.py
+++ b/Lib/test/test_zlib.py
@@ -132,10 +132,8 @@ def test_overflow(self):
     @support.cpython_only
     def test_disallow_instantiation(self):
         # Ensure that the type disallows instantiation (bpo-43916)
-        comp_type = type(zlib.compressobj())
-        decomp_type = type(zlib.decompressobj())
-        self.assertRaises(TypeError, comp_type)
-        self.assertRaises(TypeError, decomp_type)
+        support.check_disallow_instantiation(self, type(zlib.compressobj()))
+        support.check_disallow_instantiation(self, type(zlib.decompressobj()))
 
 
 class BaseCompressTestCase(object):