[3.14] gh-71339: Use new assertion methods in tests (GH-129046) (GH-134498)

(cherry picked from commit 2602d8ae981c4bae1cada2c174b367d97f712efb)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

1 files changed, 6 insertions, 15 deletions

diff --git a/Lib/test/test_statistics.py b/Lib/test/test_statistics.py
index c69baa4..5980f93 100644
--- a/Lib/test/test_statistics.py
+++ b/Lib/test/test_statistics.py
@@ -645,7 +645,7 @@ class TestNumericTestCase(unittest.TestCase):
 
     def test_numerictestcase_is_testcase(self):
         # Ensure that NumericTestCase actually is a TestCase.
-        self.assertTrue(issubclass(NumericTestCase, unittest.TestCase))
+        self.assertIsSubclass(NumericTestCase, unittest.TestCase)
 
     def test_error_msg_numeric(self):
         # Test the error message generated for numeric comparisons.
@@ -683,32 +683,23 @@ class GlobalsTest(unittest.TestCase):
     def test_meta(self):
         # Test for the existence of metadata.
         for meta in self.expected_metadata:
-            self.assertTrue(hasattr(self.module, meta),
-                            "%s not present" % meta)
+            self.assertHasAttr(self.module, meta)
 
     def test_check_all(self):
         # Check everything in __all__ exists and is public.
         module = self.module
         for name in module.__all__:
             # No private names in __all__:
-            self.assertFalse(name.startswith("_"),
+            self.assertNotStartsWith(name, "_",
                              'private name "%s" in __all__' % name)
             # And anything in __all__ must exist:
-            self.assertTrue(hasattr(module, name),
-                            'missing name "%s" in __all__' % name)
+            self.assertHasAttr(module, name)
 
 
 class StatisticsErrorTest(unittest.TestCase):
     def test_has_exception(self):
-        errmsg = (
-                "Expected StatisticsError to be a ValueError, but got a"
-                " subclass of %r instead."
-                )
-        self.assertTrue(hasattr(statistics, 'StatisticsError'))
-        self.assertTrue(
-                issubclass(statistics.StatisticsError, ValueError),
-                errmsg % statistics.StatisticsError.__base__
-                )
+        self.assertHasAttr(statistics, 'StatisticsError')
+        self.assertIsSubclass(statistics.StatisticsError, ValueError)
 
 
 # === Tests for private utility functions ===