gh-71339: Use new assertion methods in the multiprocessing tests

Author: serhiy-storchaka

Lib/test/_test_multiprocessing.py

@@ -319,7 +319,7 @@ def test_current(self):
         authkey = current.authkey
 
         self.assertTrue(current.is_alive())
-        self.assertTrue(not current.daemon)
+        self.assertFalse(current.daemon)
         self.assertIsInstance(authkey, bytes)
         self.assertTrue(len(authkey) > 0)
         self.assertEqual(current.ident, os.getpid())
@@ -463,7 +463,7 @@ def test_process(self):
         self.assertEqual(p.is_alive(), False)
         self.assertEqual(p.daemon, True)
         self.assertNotIn(p, self.active_children())
-        self.assertTrue(type(self.active_children()) is list)
+        self.assertIs(type(self.active_children()), list)
         self.assertEqual(p.exitcode, None)
 
         p.start()
@@ -583,8 +583,8 @@ def test_cpu_count(self):
             cpus = multiprocessing.cpu_count()
         except NotImplementedError:
             cpus = 1
-        self.assertTrue(type(cpus) is int)
-        self.assertTrue(cpus >= 1)
+        self.assertIsInstance(cpus, int)
+        self.assertGreaterEqual(cpus, 1)
 
     def test_active_children(self):
         self.assertEqual(type(self.active_children()), list)
@@ -2382,14 +2382,14 @@ def test_getobj_getlock(self):
         self.assertEqual(lock, lock3)
 
         arr4 = self.Value('i', 5, lock=False)
-        self.assertFalse(hasattr(arr4, 'get_lock'))
-        self.assertFalse(hasattr(arr4, 'get_obj'))
+        self.assertNotHasAttr(arr4, 'get_lock')
+        self.assertNotHasAttr(arr4, 'get_obj')
 
         self.assertRaises(AttributeError, self.Value, 'i', 5, lock='navalue')
 
         arr5 = self.RawValue('i', 5)
-        self.assertFalse(hasattr(arr5, 'get_lock'))
-        self.assertFalse(hasattr(arr5, 'get_obj'))
+        self.assertNotHasAttr(arr5, 'get_lock')
+        self.assertNotHasAttr(arr5, 'get_obj')
 
 
 class _TestArray(BaseTestCase):
@@ -2462,14 +2462,14 @@ def test_getobj_getlock_obj(self):
         self.assertEqual(lock, lock3)
 
         arr4 = self.Array('i', range(10), lock=False)
-        self.assertFalse(hasattr(arr4, 'get_lock'))
-        self.assertFalse(hasattr(arr4, 'get_obj'))
+        self.assertNotHasAttr(arr4, 'get_lock')
+        self.assertNotHasAttr(arr4, 'get_obj')
         self.assertRaises(AttributeError,
                           self.Array, 'i', range(10), lock='notalock')
 
         arr5 = self.RawArray('i', range(10))
-        self.assertFalse(hasattr(arr5, 'get_lock'))
-        self.assertFalse(hasattr(arr5, 'get_obj'))
+        self.assertNotHasAttr(arr5, 'get_lock')
+        self.assertNotHasAttr(arr5, 'get_obj')
 
 #
 #
@@ -2657,8 +2657,8 @@ def test_namespace(self):
         self.assertEqual((n.name, n.job), ('Bob', 'Builder'))
         del n.job
         self.assertEqual(str(n), "Namespace(name='Bob')")
-        self.assertTrue(hasattr(n, 'name'))
-        self.assertTrue(not hasattr(n, 'job'))
+        self.assertHasAttr(n, 'name')
+        self.assertNotHasAttr(n, 'job')
 
 #
 #
@@ -4938,13 +4938,9 @@ def test_import(self):
         for name in modules:
             __import__(name)
             mod = sys.modules[name]
-            self.assertTrue(hasattr(mod, '__all__'), name)
-
+            self.assertHasAttr(mod, '__all__', name)
             for attr in mod.__all__:
-                self.assertTrue(
-                    hasattr(mod, attr),
-                    '%r does not have attribute %r' % (mod, attr)
-                    )
+                self.assertHasAttr(mod, attr)
 
 #
 # Quick test that logging works -- does not test logging output
@@ -4957,7 +4953,7 @@ class _TestLogging(BaseTestCase):
     def test_enable_logging(self):
         logger = multiprocessing.get_logger()
         logger.setLevel(util.SUBWARNING)
-        self.assertTrue(logger is not None)
+        self.assertIsNotNone(logger)
         logger.debug('this will not be printed')
         logger.info('nor will this')
         logger.setLevel(LOG_LEVEL)
@@ -5753,9 +5749,8 @@ def test_set_get(self):
                 self.assertEqual(multiprocessing.get_start_method(), method)
                 ctx = multiprocessing.get_context()
                 self.assertEqual(ctx.get_start_method(), method)
-                self.assertTrue(type(ctx).__name__.lower().startswith(method))
-                self.assertTrue(
-                    ctx.Process.__name__.lower().startswith(method))
+                self.assertStartsWith(type(ctx).__name__.lower(), method)
+                self.assertStartsWith(ctx.Process.__name__.lower(), method)
                 self.check_context(multiprocessing)
                 count += 1
         finally:
@@ -5956,9 +5951,9 @@ def check_resource_tracker_death(self, signum, should_die):
             if should_die:
                 self.assertEqual(len(all_warn), 1)
                 the_warn = all_warn[0]
-                self.assertTrue(issubclass(the_warn.category, UserWarning))
-                self.assertTrue("resource_tracker: process died"
-                                in str(the_warn.message))
+                self.assertIsSubclass(the_warn.category, UserWarning)
+                self.assertIn("resource_tracker: process died",
+                              str(the_warn.message))
             else:
                 self.assertEqual(len(all_warn), 0)
 
@@ -6163,8 +6158,8 @@ def is_alive(self):
                 Process=FailingForkProcess))
             p.close()
             p.join()
-        self.assertFalse(
-            any(process.is_alive() for process in forked_processes))
+        for process in forked_processes:
+            self.assertFalse(process.is_alive(), process)
 
 
 @hashlib_helper.requires_hashdigest('sha256')