gh-99203: shutil.make_archive(): restore select CPython <= 3.10.5 behavior (GH-99802)

Restore following CPython <= 3.10.5 behavior of shutil.make_archive()
that went away as part of gh-93160:

Do not create an empty archive if root_dir is not a directory, and, in
that case, raise FileNotFoundError or NotADirectoryError regardless
of format choice. Beyond the brought-back behavior, the function may
now also raise these exceptions in dry_run mode.

1 files changed, 43 insertions, 0 deletions

diff --git a/Lib/test/test_shutil.py b/Lib/test/test_shutil.py
index 93f20a6..a2ca4df 100644
--- a/Lib/test/test_shutil.py
+++ b/Lib/test/test_shutil.py
@@ -1839,6 +1839,49 @@ class TestArchives(BaseTest, unittest.TestCase):
         formats = [name for name, params in get_archive_formats()]
         self.assertNotIn('xxx', formats)
 
+    def test_make_tarfile_rootdir_nodir(self):
+        # GH-99203
+        self.addCleanup(os_helper.unlink, f'{TESTFN}.tar')
+        for dry_run in (False, True):
+            with self.subTest(dry_run=dry_run):
+                tmp_dir = self.mkdtemp()
+                nonexisting_file = os.path.join(tmp_dir, 'nonexisting')
+                with self.assertRaises(FileNotFoundError) as cm:
+                    make_archive(TESTFN, 'tar', nonexisting_file, dry_run=dry_run)
+                self.assertEqual(cm.exception.errno, errno.ENOENT)
+                self.assertEqual(cm.exception.filename, nonexisting_file)
+                self.assertFalse(os.path.exists(f'{TESTFN}.tar'))
+
+                tmp_fd, tmp_file = tempfile.mkstemp(dir=tmp_dir)
+                os.close(tmp_fd)
+                with self.assertRaises(NotADirectoryError) as cm:
+                    make_archive(TESTFN, 'tar', tmp_file, dry_run=dry_run)
+                self.assertEqual(cm.exception.errno, errno.ENOTDIR)
+                self.assertEqual(cm.exception.filename, tmp_file)
+                self.assertFalse(os.path.exists(f'{TESTFN}.tar'))
+
+    @support.requires_zlib()
+    def test_make_zipfile_rootdir_nodir(self):
+        # GH-99203
+        self.addCleanup(os_helper.unlink, f'{TESTFN}.zip')
+        for dry_run in (False, True):
+            with self.subTest(dry_run=dry_run):
+                tmp_dir = self.mkdtemp()
+                nonexisting_file = os.path.join(tmp_dir, 'nonexisting')
+                with self.assertRaises(FileNotFoundError) as cm:
+                    make_archive(TESTFN, 'zip', nonexisting_file, dry_run=dry_run)
+                self.assertEqual(cm.exception.errno, errno.ENOENT)
+                self.assertEqual(cm.exception.filename, nonexisting_file)
+                self.assertFalse(os.path.exists(f'{TESTFN}.zip'))
+
+                tmp_fd, tmp_file = tempfile.mkstemp(dir=tmp_dir)
+                os.close(tmp_fd)
+                with self.assertRaises(NotADirectoryError) as cm:
+                    make_archive(TESTFN, 'zip', tmp_file, dry_run=dry_run)
+                self.assertEqual(cm.exception.errno, errno.ENOTDIR)
+                self.assertEqual(cm.exception.filename, tmp_file)
+                self.assertFalse(os.path.exists(f'{TESTFN}.zip'))
+
     ### shutil.unpack_archive
 
     def check_unpack_archive(self, format, **kwargs):