bpo-45229: Use doctest.DocTestSuite instead of run_doctest (GH-28468)

Alo use load_tests() for adding tests.

1 files changed, 10 insertions, 17 deletions

diff --git a/Lib/test/test_genexps.py b/Lib/test/test_genexps.py
index 70fe2bb..4f2d3cd 100644
--- a/Lib/test/test_genexps.py
+++ b/Lib/test/test_genexps.py
@@ -1,3 +1,8 @@
+import sys
+import doctest
+import unittest
+
+
 doctests = """
 
 Test simple loop with conditional
@@ -274,28 +279,16 @@ Verify that genexps are weakly referencable
 
 """
 
-import sys
-
 # Trace function can throw off the tuple reuse test.
 if hasattr(sys, 'gettrace') and sys.gettrace():
     __test__ = {}
 else:
     __test__ = {'doctests' : doctests}
 
-def test_main(verbose=None):
-    from test import support
-    from test import test_genexps
-    support.run_doctest(test_genexps, verbose)
-
-    # verify reference counting
-    if verbose and hasattr(sys, "gettotalrefcount"):
-        import gc
-        counts = [None] * 5
-        for i in range(len(counts)):
-            support.run_doctest(test_genexps, verbose)
-            gc.collect()
-            counts[i] = sys.gettotalrefcount()
-        print(counts)
+def load_tests(loader, tests, pattern):
+    tests.addTest(doctest.DocTestSuite())
+    return tests
+
 
 if __name__ == "__main__":
-    test_main(verbose=True)
+    unittest.main()