gh-71339: Use new assertion methods in tests

Lib/test/_test_embed_structseq.py

@@ -11,7 +11,7 @@ def check_structseq(self, obj_type):
         # ob_refcnt
         self.assertGreaterEqual(sys.getrefcount(obj_type), 1)
         # tp_base
-        self.assertTrue(issubclass(obj_type, tuple))
+        self.assertIsSubclass(obj_type, tuple)
         # tp_bases
         self.assertEqual(obj_type.__bases__, (tuple,))
         # tp_dict

Lib/test/datetimetester.py

@@ -183,7 +183,7 @@ class NotEnough(tzinfo):
             def __init__(self, offset, name):
                 self.__offset = offset
                 self.__name = name
-        self.assertTrue(issubclass(NotEnough, tzinfo))
+        self.assertIsSubclass(NotEnough, tzinfo)
         ne = NotEnough(3, "NotByALongShot")
         self.assertIsInstance(ne, tzinfo)
 
@@ -232,7 +232,7 @@ def test_pickling_subclass(self):
                 self.assertIs(type(derived), otype)
                 self.assertEqual(derived.utcoffset(None), offset)
                 self.assertEqual(derived.tzname(None), oname)
-                self.assertFalse(hasattr(derived, 'spam'))
+                self.assertNotHasAttr(derived, 'spam')
 
     def test_issue23600(self):
         DSTDIFF = DSTOFFSET = timedelta(hours=1)
@@ -813,7 +813,7 @@ def test_roundtrip(self):
 
             # Verify td -> string -> td identity.
             s = repr(td)
-            self.assertTrue(s.startswith('datetime.'))
+            self.assertStartsWith(s, 'datetime.')
             s = s[9:]
             td2 = eval(s)
             self.assertEqual(td, td2)
@@ -1231,7 +1231,7 @@ def test_roundtrip(self):
                    self.theclass.today()):
             # Verify dt -> string -> date identity.
             s = repr(dt)
-            self.assertTrue(s.startswith('datetime.'))
+            self.assertStartsWith(s, 'datetime.')
             s = s[9:]
             dt2 = eval(s)
             self.assertEqual(dt, dt2)
@@ -2218,7 +2218,7 @@ def test_roundtrip(self):
                    self.theclass.now()):
             # Verify dt -> string -> datetime identity.
             s = repr(dt)
-            self.assertTrue(s.startswith('datetime.'))
+            self.assertStartsWith(s, 'datetime.')
             s = s[9:]
             dt2 = eval(s)
             self.assertEqual(dt, dt2)
@@ -3687,7 +3687,7 @@ def test_roundtrip(self):
 
         # Verify t -> string -> time identity.
         s = repr(t)
-        self.assertTrue(s.startswith('datetime.'))
+        self.assertStartsWith(s, 'datetime.')
         s = s[9:]
         t2 = eval(s)
         self.assertEqual(t, t2)

Lib/test/mapping_tests.py

@@ -70,8 +70,8 @@ def test_read(self):
         if not d: self.fail("Full mapping must compare to True")
         # keys(), items(), iterkeys() ...
         def check_iterandlist(iter, lst, ref):
-            self.assertTrue(hasattr(iter, '__next__'))
-            self.assertTrue(hasattr(iter, '__iter__'))
+            self.assertHasAttr(iter, '__next__')
+            self.assertHasAttr(iter, '__iter__')
             x = list(iter)
             self.assertTrue(set(x)==set(lst)==set(ref))
         check_iterandlist(iter(d.keys()), list(d.keys()),

Lib/test/pickletester.py

@@ -3068,7 +3068,7 @@ def test_proto(self):
             pickled = self.dumps(None, proto)
             if proto >= 2:
                 proto_header = pickle.PROTO + bytes([proto])
-                self.assertTrue(pickled.startswith(proto_header))
+                self.assertStartsWith(pickled, proto_header)
             else:
                 self.assertEqual(count_opcode(pickle.PROTO, pickled), 0)
 
@@ -5007,7 +5007,7 @@ def test_default_dispatch_table(self):
         p = self.pickler_class(f, 0)
         with self.assertRaises(AttributeError):
             p.dispatch_table
-        self.assertFalse(hasattr(p, 'dispatch_table'))
+        self.assertNotHasAttr(p, 'dispatch_table')
 
     def test_class_dispatch_table(self):
         # A dispatch_table attribute can be specified class-wide

Lib/test/support/warnings_helper.py

@@ -23,8 +23,7 @@ def check_syntax_warning(testcase, statement, errtext='',
     testcase.assertEqual(len(warns), 1, warns)
 
     warn, = warns
-    testcase.assertTrue(issubclass(warn.category, SyntaxWarning),
-                        warn.category)
+    testcase.assertIsSubclass(warn.category, SyntaxWarning)
     if errtext:
         testcase.assertRegex(str(warn.message), errtext)
     testcase.assertEqual(warn.filename, '<testcase>')

Lib/test/test__osx_support.py

@@ -66,8 +66,8 @@ def test__find_build_tool(self):
                             'cc not found - check xcode-select')
 
     def test__get_system_version(self):
-        self.assertTrue(platform.mac_ver()[0].startswith(
-                                    _osx_support._get_system_version()))
+        self.assertStartsWith(platform.mac_ver()[0],
+                              _osx_support._get_system_version())
 
     def test__remove_original_values(self):
         config_vars = {

Lib/test/test_abstract_numbers.py

@@ -24,11 +24,11 @@ def not_implemented(*args, **kwargs):
 
 class TestNumbers(unittest.TestCase):
     def test_int(self):
-        self.assertTrue(issubclass(int, Integral))
-        self.assertTrue(issubclass(int, Rational))
-        self.assertTrue(issubclass(int, Real))
-        self.assertTrue(issubclass(int, Complex))
-        self.assertTrue(issubclass(int, Number))
+        self.assertIsSubclass(int, Integral)
+        self.assertIsSubclass(int, Rational)
+        self.assertIsSubclass(int, Real)
+        self.assertIsSubclass(int, Complex)
+        self.assertIsSubclass(int, Number)
 
         self.assertEqual(7, int(7).real)
         self.assertEqual(0, int(7).imag)
@@ -38,23 +38,23 @@ def test_int(self):
         self.assertEqual(1, int(7).denominator)
 
     def test_float(self):
-        self.assertFalse(issubclass(float, Integral))
-        self.assertFalse(issubclass(float, Rational))
-        self.assertTrue(issubclass(float, Real))
-        self.assertTrue(issubclass(float, Complex))
-        self.assertTrue(issubclass(float, Number))
+        self.assertNotIsSubclass(float, Integral)
+        self.assertNotIsSubclass(float, Rational)
+        self.assertIsSubclass(float, Real)
+        self.assertIsSubclass(float, Complex)
+        self.assertIsSubclass(float, Number)
 
         self.assertEqual(7.3, float(7.3).real)
         self.assertEqual(0, float(7.3).imag)
         self.assertEqual(7.3, float(7.3).conjugate())
         self.assertEqual(-7.3, float(-7.3).conjugate())
 
     def test_complex(self):
-        self.assertFalse(issubclass(complex, Integral))
-        self.assertFalse(issubclass(complex, Rational))
-        self.assertFalse(issubclass(complex, Real))
-        self.assertTrue(issubclass(complex, Complex))
-        self.assertTrue(issubclass(complex, Number))
+        self.assertNotIsSubclass(complex, Integral)
+        self.assertNotIsSubclass(complex, Rational)
+        self.assertNotIsSubclass(complex, Real)
+        self.assertIsSubclass(complex, Complex)
+        self.assertIsSubclass(complex, Number)
 
         c1, c2 = complex(3, 2), complex(4,1)
         # XXX: This is not ideal, but see the comment in math_trunc().

Lib/test/test_argparse.py

@@ -6805,7 +6805,7 @@ class TestImportStar(TestCase):
 
     def test(self):
         for name in argparse.__all__:
-            self.assertTrue(hasattr(argparse, name))
+            self.assertHasAttr(argparse, name)
 
     def test_all_exports_everything_but_modules(self):
         items = [

Lib/test/test_ast/test_ast.py

@@ -275,12 +275,12 @@ def test_alias(self):
         self.assertEqual(alias.end_col_offset, 17)
 
     def test_base_classes(self):
-        self.assertTrue(issubclass(ast.For, ast.stmt))
-        self.assertTrue(issubclass(ast.Name, ast.expr))
-        self.assertTrue(issubclass(ast.stmt, ast.AST))
-        self.assertTrue(issubclass(ast.expr, ast.AST))
-        self.assertTrue(issubclass(ast.comprehension, ast.AST))
-        self.assertTrue(issubclass(ast.Gt, ast.AST))
+        self.assertIsSubclass(ast.For, ast.stmt)
+        self.assertIsSubclass(ast.Name, ast.expr)
+        self.assertIsSubclass(ast.stmt, ast.AST)
+        self.assertIsSubclass(ast.expr, ast.AST)
+        self.assertIsSubclass(ast.comprehension, ast.AST)
+        self.assertIsSubclass(ast.Gt, ast.AST)
 
     def test_field_attr_existence(self):
         for name, item in ast.__dict__.items():
@@ -1101,7 +1101,7 @@ def test_copy_with_parents(self):
     def test_replace_interface(self):
         for klass in self.iter_ast_classes():
             with self.subTest(klass=klass):
-                self.assertTrue(hasattr(klass, '__replace__'))
+                self.assertHasAttr(klass, '__replace__')
 
             fields = set(klass._fields)
             with self.subTest(klass=klass, fields=fields):
@@ -1330,7 +1330,7 @@ def test_replace_reject_known_custom_instance_fields_commits(self):
         context = node.ctx
 
         # explicit rejection of known instance fields
-        self.assertTrue(hasattr(node, 'extra'))
+        self.assertHasAttr(node, 'extra')
         msg = "Name.__replace__ got an unexpected keyword argument 'extra'."
         with self.assertRaisesRegex(TypeError, re.escape(msg)):
             copy.replace(node, extra=1)
@@ -3071,7 +3071,7 @@ def test_FunctionDef(self):
         with self.assertWarnsRegex(DeprecationWarning,
                                    r"FunctionDef\.__init__ missing 1 required positional argument: 'name'"):
             node = ast.FunctionDef(args=args)
-        self.assertFalse(hasattr(node, "name"))
+        self.assertNotHasAttr(node, "name")
         self.assertEqual(node.decorator_list, [])
         node = ast.FunctionDef(name='foo', args=args)
         self.assertEqual(node.name, 'foo')

Lib/test/test_audit.py

@@ -134,7 +134,7 @@ def test_socket(self):
         self.assertEqual(events[0][0], "socket.gethostname")
         self.assertEqual(events[1][0], "socket.__new__")
         self.assertEqual(events[2][0], "socket.bind")
-        self.assertTrue(events[2][2].endswith("('127.0.0.1', 8080)"))
+        self.assertEndsWith(events[2][2], "('127.0.0.1', 8080)")
 
     def test_gc(self):
         returncode, events, stderr = self.run_python("test_gc")

Lib/test/test_base64.py

@@ -812,7 +812,7 @@ def test_decode_nonascii_str(self):
             self.assertRaises(ValueError, f, 'with non-ascii \xcb')
 
     def test_ErrorHeritage(self):
-        self.assertTrue(issubclass(binascii.Error, ValueError))
+        self.assertIsSubclass(binascii.Error, ValueError)
 
     def test_RFC4648_test_cases(self):
         # test cases from RFC 4648 section 10

Lib/test/test_baseexception.py

@@ -10,13 +10,11 @@ class ExceptionClassTests(unittest.TestCase):
     inheritance hierarchy)"""
 
     def test_builtins_new_style(self):
-        self.assertTrue(issubclass(Exception, object))
+        self.assertIsSubclass(Exception, object)
 
     def verify_instance_interface(self, ins):
         for attr in ("args", "__str__", "__repr__"):
-            self.assertTrue(hasattr(ins, attr),
-                    "%s missing %s attribute" %
-                        (ins.__class__.__name__, attr))
+            self.assertHasAttr(ins, attr)
 
     def test_inheritance(self):
         # Make sure the inheritance hierarchy matches the documentation
@@ -65,7 +63,7 @@ def test_inheritance(self):
                 elif last_depth > depth:
                     while superclasses[-1][0] >= depth:
                         superclasses.pop()
-                self.assertTrue(issubclass(exc, superclasses[-1][1]),
+                self.assertIsSubclass(exc, superclasses[-1][1],
                 "%s is not a subclass of %s" % (exc.__name__,
                     superclasses[-1][1].__name__))
                 try:  # Some exceptions require arguments; just skip them

Lib/test/test_binascii.py

@@ -38,13 +38,13 @@ def assertConversion(self, original, converted, restored, **kwargs):
 
     def test_exceptions(self):
         # Check module exceptions
-        self.assertTrue(issubclass(binascii.Error, Exception))
-        self.assertTrue(issubclass(binascii.Incomplete, Exception))
+        self.assertIsSubclass(binascii.Error, Exception)
+        self.assertIsSubclass(binascii.Incomplete, Exception)
 
     def test_functions(self):
         # Check presence of all functions
         for name in all_functions:
-            self.assertTrue(hasattr(getattr(binascii, name), '__call__'))
+            self.assertHasAttr(getattr(binascii, name), '__call__')
             self.assertRaises(TypeError, getattr(binascii, name))
 
     def test_returned_value(self):

Lib/test/test_binop.py

@@ -383,7 +383,7 @@ def test_comparison_orders(self):
         self.assertEqual(op_sequence(le, B, C), ['C.__ge__', 'B.__le__'])
         self.assertEqual(op_sequence(le, C, B), ['C.__le__', 'B.__ge__'])
 
-        self.assertTrue(issubclass(V, B))
+        self.assertIsSubclass(V, B)
         self.assertEqual(op_sequence(eq, B, V), ['B.__eq__', 'V.__eq__'])
         self.assertEqual(op_sequence(le, B, V), ['B.__le__', 'V.__ge__'])
 

Lib/test/test_buffer.py

@@ -2879,11 +2879,11 @@ def test_memoryview_tolist(self):
     def test_memoryview_repr(self):
         m = memoryview(bytearray(9))
         r = m.__repr__()
-        self.assertTrue(r.startswith("<memory"))
+        self.assertStartsWith(r, "<memory")
 
         m.release()
         r = m.__repr__()
-        self.assertTrue(r.startswith("<released"))
+        self.assertStartsWith(r, "<released")
 
     def test_memoryview_sequence(self):
 

Lib/test/test_builtin.py

@@ -393,7 +393,7 @@ def test_chr(self):
         self.assertRaises(ValueError, chr, -2**1000)
 
     def test_cmp(self):
-        self.assertTrue(not hasattr(builtins, "cmp"))
+        self.assertNotHasAttr(builtins, "cmp")
 
     def test_compile(self):
         compile('print(1)\n', '', 'exec')
@@ -2304,7 +2304,7 @@ def __format__(self, format_spec):
         # tests for object.__format__ really belong elsewhere, but
         #  there's no good place to put them
         x = object().__format__('')
-        self.assertTrue(x.startswith('<object object at'))
+        self.assertStartsWith(x, '<object object at')
 
         # first argument to object.__format__ must be string
         self.assertRaises(TypeError, object().__format__, 3)

Lib/test/test_bytes.py

@@ -1974,9 +1974,9 @@ def test_compare_bytes_to_bytearray(self):
     @test.support.requires_docstrings
     def test_doc(self):
         self.assertIsNotNone(bytearray.__doc__)
-        self.assertTrue(bytearray.__doc__.startswith("bytearray("), bytearray.__doc__)
+        self.assertStartsWith(bytearray.__doc__, "bytearray(")
         self.assertIsNotNone(bytes.__doc__)
-        self.assertTrue(bytes.__doc__.startswith("bytes("), bytes.__doc__)
+        self.assertStartsWith(bytes.__doc__, "bytes(")
 
     def test_from_bytearray(self):
         sample = bytes(b"Hello world\n\x80\x81\xfe\xff")
@@ -2107,7 +2107,7 @@ class BytesAsStringTest(FixedStringTest, unittest.TestCase):
 class SubclassTest:
 
     def test_basic(self):
-        self.assertTrue(issubclass(self.type2test, self.basetype))
+        self.assertIsSubclass(self.type2test, self.basetype)
         self.assertIsInstance(self.type2test(), self.basetype)
 
         a, b = b"abcd", b"efgh"
@@ -2155,7 +2155,7 @@ def test_pickle(self):
             self.assertEqual(a.z, b.z)
             self.assertEqual(type(a), type(b))
             self.assertEqual(type(a.z), type(b.z))
-            self.assertFalse(hasattr(b, 'y'))
+            self.assertNotHasAttr(b, 'y')
 
     def test_copy(self):
         a = self.type2test(b"abcd")
@@ -2169,7 +2169,7 @@ def test_copy(self):
             self.assertEqual(a.z, b.z)
             self.assertEqual(type(a), type(b))
             self.assertEqual(type(a.z), type(b.z))
-            self.assertFalse(hasattr(b, 'y'))
+            self.assertNotHasAttr(b, 'y')
 
     def test_fromhex(self):
         b = self.type2test.fromhex('1a2B30')

Lib/test/test_bz2.py

@@ -184,7 +184,7 @@ def testPeek(self):
         with BZ2File(self.filename) as bz2f:
             pdata = bz2f.peek()
             self.assertNotEqual(len(pdata), 0)
-            self.assertTrue(self.TEXT.startswith(pdata))
+            self.assertStartsWith(self.TEXT, pdata)
             self.assertEqual(bz2f.read(), self.TEXT)
 
     def testReadInto(self):
@@ -768,7 +768,7 @@ def testPeekBytesIO(self):
             with BZ2File(bio) as bz2f:
                 pdata = bz2f.peek()
                 self.assertNotEqual(len(pdata), 0)
-                self.assertTrue(self.TEXT.startswith(pdata))
+                self.assertStartsWith(self.TEXT, pdata)
                 self.assertEqual(bz2f.read(), self.TEXT)
 
     def testWriteBytesIO(self):

Lib/test/test_calendar.py

@@ -1098,7 +1098,7 @@ def test_option_type(self):
             output = run('--type', 'text', '2004')
             self.assertEqual(output, conv(result_2004_text))
             output = run('--type', 'html', '2004')
-            self.assertEqual(output[:6], b'<?xml ')
+            self.assertStartsWith(output, b'<?xml ')
             self.assertIn(b'<title>Calendar for 2004</title>', output)
 
     def test_html_output_current_year(self):

Lib/test/test_call.py

@@ -695,8 +695,8 @@ class DerivedType(SuperType):
         UnaffectedType2 = _testcapi.make_vectorcall_class(SuperType)
 
         # Aside: Quickly check that the C helper actually made derived types
-        self.assertTrue(issubclass(UnaffectedType1, DerivedType))
-        self.assertTrue(issubclass(UnaffectedType2, SuperType))
+        self.assertIsSubclass(UnaffectedType1, DerivedType)
+        self.assertIsSubclass(UnaffectedType2, SuperType)
 
         # Initial state: tp_call
         self.assertEqual(instance(), "tp_call")