[3.13] gh-71339: Use new assertion methods in test_import and test_importlib (GH-129052) (#129123)

(cherry picked from commit f7cc7d2)

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

Author: serhiy-storchaka

Lib/test/test_import/__init__.py

@@ -50,6 +50,7 @@
     TESTFN, rmtree, temp_umask, TESTFN_UNENCODABLE)
 from test.support import script_helper
 from test.support import threading_helper
+from test.support.testcase import ExtraAssertions
 from test.test_importlib.util import uncache
 from types import ModuleType
 try:
@@ -364,7 +365,7 @@ def _from_subinterp(cls, name, interpid, pipe, script_kwargs):
 
 
 @force_not_colorized_test_class
-class ImportTests(unittest.TestCase):
+class ImportTests(unittest.TestCase, ExtraAssertions):
 
     def setUp(self):
         remove_files(TESTFN)
@@ -570,7 +571,7 @@ def test_import_name_binding(self):
         import test as x
         import test.support
         self.assertIs(x, test, x.__name__)
-        self.assertTrue(hasattr(test.support, "__file__"))
+        self.assertHasAttr(test.support, "__file__")
 
         # import x.y.z as w binds z as w
         import test.support as y
@@ -641,7 +642,7 @@ def test_file_to_source(self):
         sys.path.insert(0, os.curdir)
         try:
             mod = __import__(TESTFN)
-            self.assertTrue(mod.__file__.endswith('.py'))
+            self.assertEndsWith(mod.__file__, '.py')
             os.remove(source)
             del sys.modules[TESTFN]
             make_legacy_pyc(source)
@@ -1447,7 +1448,7 @@ def test_foreign_code(self):
         self.assertEqual(mod.constant.co_filename, foreign_code.co_filename)
 
 
-class PathsTests(unittest.TestCase):
+class PathsTests(unittest.TestCase, ExtraAssertions):
     SAMPLES = ('test', 'test\u00e4\u00f6\u00fc\u00df', 'test\u00e9\u00e8',
                'test\u00b0\u00b3\u00b2')
     path = TESTFN
@@ -1497,11 +1498,11 @@ def test_UNC_path(self):
             self.fail("could not import 'test_unc_path' from %r: %r"
                       % (unc, e))
         self.assertEqual(mod.testdata, 'test_unc_path')
-        self.assertTrue(mod.__file__.startswith(unc), mod.__file__)
+        self.assertStartsWith(mod.__file__, unc)
         unload("test_unc_path")
 
 
-class RelativeImportTests(unittest.TestCase):
+class RelativeImportTests(unittest.TestCase, ExtraAssertions):
 
     def tearDown(self):
         unload("test.relimport")
@@ -1510,7 +1511,7 @@ def tearDown(self):
     def test_relimport_star(self):
         # This will import * from .test_import.
         from .. import relimport
-        self.assertTrue(hasattr(relimport, "RelativeImportTests"))
+        self.assertHasAttr(relimport, "RelativeImportTests")
 
     def test_issue3221(self):
         # Note for mergers: the 'absolute' tests from the 2.x branch
@@ -1827,7 +1828,7 @@ def test_symlinked_dir_importable(self):
 
 
 @cpython_only
-class ImportlibBootstrapTests(unittest.TestCase):
+class ImportlibBootstrapTests(unittest.TestCase, ExtraAssertions):
     # These tests check that importlib is bootstrapped.
 
     def test_frozen_importlib(self):
@@ -1840,15 +1841,15 @@ def test_frozen_importlib_is_bootstrap(self):
         self.assertIs(mod, _bootstrap)
         self.assertEqual(mod.__name__, 'importlib._bootstrap')
         self.assertEqual(mod.__package__, 'importlib')
-        self.assertTrue(mod.__file__.endswith('_bootstrap.py'), mod.__file__)
+        self.assertEndsWith(mod.__file__, '_bootstrap.py')
 
     def test_frozen_importlib_external_is_bootstrap_external(self):
         from importlib import _bootstrap_external
         mod = sys.modules['_frozen_importlib_external']
         self.assertIs(mod, _bootstrap_external)
         self.assertEqual(mod.__name__, 'importlib._bootstrap_external')
         self.assertEqual(mod.__package__, 'importlib')
-        self.assertTrue(mod.__file__.endswith('_bootstrap_external.py'), mod.__file__)
+        self.assertEndsWith(mod.__file__, '_bootstrap_external.py')
 
     def test_there_can_be_only_one(self):
         # Issue #15386 revealed a tricky loophole in the bootstrapping
@@ -2698,7 +2699,7 @@ def parse(cls, text):
 
 
 @requires_singlephase_init
-class SinglephaseInitTests(unittest.TestCase):
+class SinglephaseInitTests(unittest.TestCase, ExtraAssertions):
 
     NAME = '_testsinglephase'
 
@@ -2869,7 +2870,7 @@ def check_common(self, loaded):
         self.assertEqual(mod.__file__, self.FILE)
         self.assertEqual(mod.__spec__.origin, self.ORIGIN)
         if not isolated:
-            self.assertTrue(issubclass(mod.error, Exception))
+            self.assertIsSubclass(mod.error, Exception)
         self.assertEqual(mod.int_const, 1969)
         self.assertEqual(mod.str_const, 'something different')
         self.assertIsInstance(mod._module_initialized, float)

Lib/test/test_importlib/extension/test_path_hook.py

@@ -21,7 +21,7 @@ def hook(self, entry):
     def test_success(self):
         # Path hook should handle a directory where a known extension module
         # exists.
-        self.assertTrue(hasattr(self.hook(util.EXTENSIONS.path), 'find_spec'))
+        self.assertHasAttr(self.hook(util.EXTENSIONS.path), 'find_spec')
 
 
 (Frozen_PathHooksTests,

Lib/test/test_importlib/frozen/test_loader.py

@@ -61,7 +61,7 @@ def exec_module(self, name, origname=None):
             module.main()
 
         self.assertTrue(module.initialized)
-        self.assertTrue(hasattr(module, '__spec__'))
+        self.assertHasAttr(module, '__spec__')
         self.assertEqual(module.__spec__.origin, 'frozen')
         return module, stdout.getvalue()
 
@@ -72,7 +72,7 @@ def test_module(self):
         for attr, value in check.items():
             self.assertEqual(getattr(module, attr), value)
         self.assertEqual(output, 'Hello world!\n')
-        self.assertTrue(hasattr(module, '__spec__'))
+        self.assertHasAttr(module, '__spec__')
         self.assertEqual(module.__spec__.loader_state.origname, name)
 
     def test_package(self):
@@ -136,7 +136,7 @@ def test_get_code(self):
             exec(code, mod.__dict__)
         with captured_stdout() as stdout:
             mod.main()
-        self.assertTrue(hasattr(mod, 'initialized'))
+        self.assertHasAttr(mod, 'initialized')
         self.assertEqual(stdout.getvalue(), 'Hello world!\n')
 
     def test_get_source(self):

Lib/test/test_importlib/import_/test_caching.py

@@ -1,5 +1,6 @@
 """Test that sys.modules is used properly by import."""
 from test.test_importlib import util
+from test.support.testcase import ExtraAssertions
 import sys
 from types import MethodType
 import unittest
@@ -45,7 +46,7 @@ def test_None_in_cache(self):
  ) = util.test_both(UseCache, __import__=util.__import__)
 
 
-class ImportlibUseCache(UseCache, unittest.TestCase):
+class ImportlibUseCache(UseCache, unittest.TestCase, ExtraAssertions):
 
     # Pertinent only to PEP 302; exec_module() doesn't return a module.
 
@@ -78,7 +79,7 @@ def test_using_cache_for_assigning_to_attribute(self):
             with self.create_mock('pkg.__init__', 'pkg.module') as importer:
                 with util.import_state(meta_path=[importer]):
                     module = self.__import__('pkg.module')
-                    self.assertTrue(hasattr(module, 'module'))
+                    self.assertHasAttr(module, 'module')
                     self.assertEqual(id(module.module),
                                     id(sys.modules['pkg.module']))
 
@@ -88,7 +89,7 @@ def test_using_cache_for_fromlist(self):
         with self.create_mock('pkg.__init__', 'pkg.module') as importer:
             with util.import_state(meta_path=[importer]):
                 module = self.__import__('pkg', fromlist=['module'])
-                self.assertTrue(hasattr(module, 'module'))
+                self.assertHasAttr(module, 'module')
                 self.assertEqual(id(module.module),
                                  id(sys.modules['pkg.module']))
 

Lib/test/test_importlib/import_/test_fromlist.py

@@ -63,23 +63,23 @@ def test_nonexistent_object(self):
             with util.import_state(meta_path=[importer]):
                 module = self.__import__('module', fromlist=['non_existent'])
                 self.assertEqual(module.__name__, 'module')
-                self.assertFalse(hasattr(module, 'non_existent'))
+                self.assertNotHasAttr(module, 'non_existent')
 
     def test_module_from_package(self):
         # [module]
         with util.mock_spec('pkg.__init__', 'pkg.module') as importer:
             with util.import_state(meta_path=[importer]):
                 module = self.__import__('pkg', fromlist=['module'])
                 self.assertEqual(module.__name__, 'pkg')
-                self.assertTrue(hasattr(module, 'module'))
+                self.assertHasAttr(module, 'module')
                 self.assertEqual(module.module.__name__, 'pkg.module')
 
     def test_nonexistent_from_package(self):
         with util.mock_spec('pkg.__init__') as importer:
             with util.import_state(meta_path=[importer]):
                 module = self.__import__('pkg', fromlist=['non_existent'])
                 self.assertEqual(module.__name__, 'pkg')
-                self.assertFalse(hasattr(module, 'non_existent'))
+                self.assertNotHasAttr(module, 'non_existent')
 
     def test_module_from_package_triggers_ModuleNotFoundError(self):
         # If a submodule causes an ModuleNotFoundError because it tries
@@ -107,7 +107,7 @@ def basic_star_test(self, fromlist=['*']):
                 mock['pkg'].__all__ = ['module']
                 module = self.__import__('pkg', fromlist=fromlist)
                 self.assertEqual(module.__name__, 'pkg')
-                self.assertTrue(hasattr(module, 'module'))
+                self.assertHasAttr(module, 'module')
                 self.assertEqual(module.module.__name__, 'pkg.module')
 
     def test_using_star(self):
@@ -125,8 +125,8 @@ def test_star_with_others(self):
                 mock['pkg'].__all__ = ['module1']
                 module = self.__import__('pkg', fromlist=['module2', '*'])
                 self.assertEqual(module.__name__, 'pkg')
-                self.assertTrue(hasattr(module, 'module1'))
-                self.assertTrue(hasattr(module, 'module2'))
+                self.assertHasAttr(module, 'module1')
+                self.assertHasAttr(module, 'module2')
                 self.assertEqual(module.module1.__name__, 'pkg.module1')
                 self.assertEqual(module.module2.__name__, 'pkg.module2')
 
@@ -136,15 +136,15 @@ def test_nonexistent_in_all(self):
                 importer['pkg'].__all__ = ['non_existent']
                 module = self.__import__('pkg', fromlist=['*'])
                 self.assertEqual(module.__name__, 'pkg')
-                self.assertFalse(hasattr(module, 'non_existent'))
+                self.assertNotHasAttr(module, 'non_existent')
 
     def test_star_in_all(self):
         with util.mock_spec('pkg.__init__') as importer:
             with util.import_state(meta_path=[importer]):
                 importer['pkg'].__all__ = ['*']
                 module = self.__import__('pkg', fromlist=['*'])
                 self.assertEqual(module.__name__, 'pkg')
-                self.assertFalse(hasattr(module, '*'))
+                self.assertNotHasAttr(module, '*')
 
     def test_invalid_type(self):
         with util.mock_spec('pkg.__init__') as importer:

Lib/test/test_importlib/import_/test_meta_path.py

@@ -43,7 +43,7 @@ def test_empty(self):
                 self.assertIsNone(importlib._bootstrap._find_spec('nothing',
                                                                   None))
                 self.assertEqual(len(w), 1)
-                self.assertTrue(issubclass(w[-1].category, ImportWarning))
+                self.assertIsSubclass(w[-1].category, ImportWarning)
 
 
 (Frozen_CallingOrder,

Lib/test/test_importlib/import_/test_path.py

@@ -80,7 +80,7 @@ def test_empty_path_hooks(self):
                 self.assertIsNone(self.find('os'))
                 self.assertIsNone(sys.path_importer_cache[path_entry])
                 self.assertEqual(len(w), 1)
-                self.assertTrue(issubclass(w[-1].category, ImportWarning))
+                self.assertIsSubclass(w[-1].category, ImportWarning)
 
     def test_path_importer_cache_empty_string(self):
         # The empty string should create a finder using the cwd.

Lib/test/test_importlib/import_/test_relative_imports.py

@@ -81,7 +81,7 @@ def callback(global_):
             self.__import__('pkg')  # For __import__().
             module = self.__import__('', global_, fromlist=['mod2'], level=1)
             self.assertEqual(module.__name__, 'pkg')
-            self.assertTrue(hasattr(module, 'mod2'))
+            self.assertHasAttr(module, 'mod2')
             self.assertEqual(module.mod2.attr, 'pkg.mod2')
         self.relative_import_test(create, globals_, callback)
 
@@ -107,7 +107,7 @@ def callback(global_):
             module = self.__import__('', global_, fromlist=['module'],
                              level=1)
             self.assertEqual(module.__name__, 'pkg')
-            self.assertTrue(hasattr(module, 'module'))
+            self.assertHasAttr(module, 'module')
             self.assertEqual(module.module.attr, 'pkg.module')
         self.relative_import_test(create, globals_, callback)
 
@@ -131,7 +131,7 @@ def callback(global_):
             module = self.__import__('', global_, fromlist=['subpkg2'],
                                             level=2)
             self.assertEqual(module.__name__, 'pkg')
-            self.assertTrue(hasattr(module, 'subpkg2'))
+            self.assertHasAttr(module, 'subpkg2')
             self.assertEqual(module.subpkg2.attr, 'pkg.subpkg2.__init__')
         self.relative_import_test(create, globals_, callback)
 

Lib/test/test_importlib/resources/test_path.py

@@ -4,6 +4,7 @@
 
 from importlib import resources
 from . import util
+from test.support.testcase import ExtraAssertions
 
 
 class CommonTests(util.CommonTests, unittest.TestCase):
@@ -12,15 +13,15 @@ def execute(self, package, path):
             pass
 
 
-class PathTests:
+class PathTests(ExtraAssertions):
     def test_reading(self):
         """
         Path should be readable and a pathlib.Path instance.
         """
         target = resources.files(self.data) / 'utf-8.file'
         with resources.as_file(target) as path:
             self.assertIsInstance(path, pathlib.Path)
-            self.assertTrue(path.name.endswith("utf-8.file"), repr(path))
+            self.assertEndsWith(path.name, "utf-8.file")
             self.assertEqual('Hello, UTF-8 world!\n', path.read_text(encoding='utf-8'))
 
 

Lib/test/test_importlib/source/test_finder.py

@@ -73,7 +73,7 @@ def run_test(self, test, create=None, *, compile_=None, unlink=None):
                         if error.errno != errno.ENOENT:
                             raise
             loader = self.import_(mapping['.root'], test)
-            self.assertTrue(hasattr(loader, 'load_module'))
+            self.assertHasAttr(loader, 'load_module')
             return loader
 
     def test_module(self):
@@ -100,15 +100,15 @@ def test_module_in_package(self):
         with util.create_modules('pkg.__init__', 'pkg.sub') as mapping:
             pkg_dir = os.path.dirname(mapping['pkg.__init__'])
             loader = self.import_(pkg_dir, 'pkg.sub')
-            self.assertTrue(hasattr(loader, 'load_module'))
+            self.assertHasAttr(loader, 'load_module')
 
     # [sub package]
     def test_package_in_package(self):
         context = util.create_modules('pkg.__init__', 'pkg.sub.__init__')
         with context as mapping:
             pkg_dir = os.path.dirname(mapping['pkg.__init__'])
             loader = self.import_(pkg_dir, 'pkg.sub')
-            self.assertTrue(hasattr(loader, 'load_module'))
+            self.assertHasAttr(loader, 'load_module')
 
     # [package over modules]
     def test_package_over_module(self):
@@ -129,7 +129,7 @@ def test_empty_string_for_dir(self):
             file.write("# test file for importlib")
         try:
             loader = self._find(finder, 'mod', loader_only=True)
-            self.assertTrue(hasattr(loader, 'load_module'))
+            self.assertHasAttr(loader, 'load_module')
         finally:
             os.unlink('mod.py')
 

Lib/test/test_importlib/source/test_path_hook.py

@@ -15,12 +15,12 @@ def path_hook(self):
 
     def test_success(self):
         with util.create_modules('dummy') as mapping:
-            self.assertTrue(hasattr(self.path_hook()(mapping['.root']),
-                                    'find_spec'))
+            self.assertHasAttr(self.path_hook()(mapping['.root']),
+                               'find_spec')
 
     def test_empty_string(self):
         # The empty string represents the cwd.
-        self.assertTrue(hasattr(self.path_hook()(''), 'find_spec'))
+        self.assertHasAttr(self.path_hook()(''), 'find_spec')
 
 
 (Frozen_PathHookTest,