gh-108303: Move `zip` and `tar` archives to `Lib/test/archivetestdata` (#111549)

diff --git a/Lib/test/ziptestdata/README.md b/Lib/test/archivetestdata/README.md
similarity index 76%
rename from Lib/test/ziptestdata/README.md
rename to Lib/test/archivetestdata/README.md
index 00d96d4..7b555fa 100644
--- a/Lib/test/ziptestdata/README.md
+++ b/Lib/test/archivetestdata/README.md
@@ -1,21 +1,23 @@
-# Test data for `test_zipfile`
+# Test data for `test_zipfile`, `test_tarfile` (and even some others)
 
-The test executables in this directory are created manually from header.sh and
+## `test_zipfile`
+
+The test executables in this directory are created manually from `header.sh` and
 the `testdata_module_inside_zip.py` file.  You must have Info-ZIP's zip utility
 installed (`apt install zip` on Debian).
 
-## Purpose
+### Purpose of `exe_with_zip` and `exe_with_z64`
 
 These are used to test executable files with an appended zipfile, in a scenario
 where the executable is _not_ a Python interpreter itself so our automatic
 zipimport machinery (that'd look for `__main__.py`) is not being used.
 
-## Updating the test executables
+### Updating the test executables
 
 If you update header.sh or the testdata_module_inside_zip.py file, rerun the
 commands below.  These are expected to be rarely changed, if ever.
 
-### Standard old format (2.0) zip file
+#### Standard old format (2.0) zip file
 
 ```
 zip -0 zip2.zip testdata_module_inside_zip.py
@@ -23,7 +25,7 @@
 rm zip2.zip
 ```
 
-### Modern format (4.5) zip64 file
+#### Modern format (4.5) zip64 file
 
 Redirecting from stdin forces Info-ZIP's zip tool to create a zip64.
 
@@ -32,4 +34,3 @@
 cat header.sh zip64.zip >exe_with_z64
 rm zip64.zip
 ```
-
diff --git a/Lib/test/ziptestdata/exe_with_z64 b/Lib/test/archivetestdata/exe_with_z64
similarity index 100%
rename from Lib/test/ziptestdata/exe_with_z64
rename to Lib/test/archivetestdata/exe_with_z64
Binary files differ
diff --git a/Lib/test/ziptestdata/exe_with_zip b/Lib/test/archivetestdata/exe_with_zip
similarity index 100%
rename from Lib/test/ziptestdata/exe_with_zip
rename to Lib/test/archivetestdata/exe_with_zip
Binary files differ
diff --git a/Lib/test/ziptestdata/header.sh b/Lib/test/archivetestdata/header.sh
similarity index 100%
rename from Lib/test/ziptestdata/header.sh
rename to Lib/test/archivetestdata/header.sh
diff --git a/Lib/test/recursion.tar b/Lib/test/archivetestdata/recursion.tar
similarity index 100%
rename from Lib/test/recursion.tar
rename to Lib/test/archivetestdata/recursion.tar
Binary files differ
diff --git a/Lib/test/ziptestdata/testdata_module_inside_zip.py b/Lib/test/archivetestdata/testdata_module_inside_zip.py
similarity index 100%
rename from Lib/test/ziptestdata/testdata_module_inside_zip.py
rename to Lib/test/archivetestdata/testdata_module_inside_zip.py
diff --git a/Lib/test/testtar.tar b/Lib/test/archivetestdata/testtar.tar
similarity index 100%
rename from Lib/test/testtar.tar
rename to Lib/test/archivetestdata/testtar.tar
Binary files differ
diff --git a/Lib/test/testtar.tar.xz b/Lib/test/archivetestdata/testtar.tar.xz
similarity index 100%
rename from Lib/test/testtar.tar.xz
rename to Lib/test/archivetestdata/testtar.tar.xz
Binary files differ
diff --git a/Lib/test/zip_cp437_header.zip b/Lib/test/archivetestdata/zip_cp437_header.zip
similarity index 100%
rename from Lib/test/zip_cp437_header.zip
rename to Lib/test/archivetestdata/zip_cp437_header.zip
Binary files differ
diff --git a/Lib/test/zipdir.zip b/Lib/test/archivetestdata/zipdir.zip
similarity index 100%
rename from Lib/test/zipdir.zip
rename to Lib/test/archivetestdata/zipdir.zip
Binary files differ
diff --git a/Lib/test/test_contextlib.py b/Lib/test/test_contextlib.py
index 3dad256..e32a091 100644
--- a/Lib/test/test_contextlib.py
+++ b/Lib/test/test_contextlib.py
@@ -1318,7 +1318,7 @@ def test_simple(self):
     def test_reentrant(self):
         old_cwd = os.getcwd()
         target1 = self.make_relative_path('data')
-        target2 = self.make_relative_path('ziptestdata')
+        target2 = self.make_relative_path('archivetestdata')
         self.assertNotIn(old_cwd, (target1, target2))
         chdir1, chdir2 = chdir(target1), chdir(target2)
 
diff --git a/Lib/test/test_tarfile.py b/Lib/test/test_tarfile.py
index cc26da0..761560b 100644
--- a/Lib/test/test_tarfile.py
+++ b/Lib/test/test_tarfile.py
@@ -43,7 +43,7 @@ def sha256sum(data):
 
 TEMPDIR = os.path.abspath(os_helper.TESTFN) + "-tardir"
 tarextdir = TEMPDIR + '-extract-test'
-tarname = support.findfile("testtar.tar")
+tarname = support.findfile("testtar.tar", subdir="archivetestdata")
 gzipname = os.path.join(TEMPDIR, "testtar.tar.gz")
 bz2name = os.path.join(TEMPDIR, "testtar.tar.bz2")
 xzname = os.path.join(TEMPDIR, "testtar.tar.xz")
@@ -491,7 +491,7 @@ def test_length_zero_header(self):
         # bpo-39017 (CVE-2019-20907): reading a zero-length header should fail
         # with an exception
         with self.assertRaisesRegex(tarfile.ReadError, "file could not be opened successfully"):
-            with tarfile.open(support.findfile('recursion.tar')) as tar:
+            with tarfile.open(support.findfile('recursion.tar', subdir='archivetestdata')):
                 pass
 
     def test_extractfile_name(self):
@@ -2565,7 +2565,7 @@ def test__all__(self):
         support.check__all__(self, tarfile, not_exported=not_exported)
 
     def test_useful_error_message_when_modules_missing(self):
-        fname = os.path.join(os.path.dirname(__file__), 'testtar.tar.xz')
+        fname = os.path.join(os.path.dirname(__file__), 'archivetestdata', 'testtar.tar.xz')
         with self.assertRaises(tarfile.ReadError) as excinfo:
             error = tarfile.CompressionError('lzma module is not available'),
             with unittest.mock.patch.object(tarfile.TarFile, 'xzopen', side_effect=error):
@@ -2630,7 +2630,7 @@ def test_test_command_verbose(self):
                 self.assertIn(b'is a tar archive.\n', out)
 
     def test_test_command_invalid_file(self):
-        zipname = support.findfile('zipdir.zip')
+        zipname = support.findfile('zipdir.zip', subdir='archivetestdata')
         rc, out, err = self.tarfilecmd_failure('-t', zipname)
         self.assertIn(b' is not a tar archive.', err)
         self.assertEqual(out, b'')
@@ -2672,7 +2672,7 @@ def test_list_command_verbose(self):
                 self.assertEqual(out, expected)
 
     def test_list_command_invalid_file(self):
-        zipname = support.findfile('zipdir.zip')
+        zipname = support.findfile('zipdir.zip', subdir='archivetestdata')
         rc, out, err = self.tarfilecmd_failure('-l', zipname)
         self.assertIn(b' is not a tar archive.', err)
         self.assertEqual(out, b'')
@@ -2797,7 +2797,7 @@ def test_extract_command_different_directory(self):
             os_helper.rmtree(tarextdir)
 
     def test_extract_command_invalid_file(self):
-        zipname = support.findfile('zipdir.zip')
+        zipname = support.findfile('zipdir.zip', subdir='archivetestdata')
         with os_helper.temp_cwd(tarextdir):
             rc, out, err = self.tarfilecmd_failure('-e', zipname)
         self.assertIn(b' is not a tar archive.', err)
diff --git a/Lib/test/test_zipfile/test_core.py b/Lib/test/test_zipfile/test_core.py
index fb6b0b3..a51764b 100644
--- a/Lib/test/test_zipfile/test_core.py
+++ b/Lib/test/test_zipfile/test_core.py
@@ -1754,7 +1754,7 @@ def test_unsupported_version(self):
     @requires_zlib()
     def test_read_unicode_filenames(self):
         # bug #10801
-        fname = findfile('zip_cp437_header.zip')
+        fname = findfile('zip_cp437_header.zip', subdir='archivetestdata')
         with zipfile.ZipFile(fname) as zipfp:
             for name in zipfp.namelist():
                 zipfp.open(name).close()
@@ -2804,7 +2804,7 @@ def setUp(self):
         os.mkdir(TESTFN2)
 
     def test_extract_dir(self):
-        with zipfile.ZipFile(findfile("zipdir.zip")) as zipf:
+        with zipfile.ZipFile(findfile("zipdir.zip", subdir="archivetestdata")) as zipf:
             zipf.extractall(TESTFN2)
         self.assertTrue(os.path.isdir(os.path.join(TESTFN2, "a")))
         self.assertTrue(os.path.isdir(os.path.join(TESTFN2, "a", "b")))
@@ -2973,7 +2973,7 @@ def test_bad_use(self):
         self.assertNotEqual(err.strip(), b'')
 
     def test_test_command(self):
-        zip_name = findfile('zipdir.zip')
+        zip_name = findfile('zipdir.zip', subdir='archivetestdata')
         for opt in '-t', '--test':
             out = self.zipfilecmd(opt, zip_name)
             self.assertEqual(out.rstrip(), b'Done testing')
@@ -2982,7 +2982,7 @@ def test_test_command(self):
         self.assertEqual(out, b'')
 
     def test_list_command(self):
-        zip_name = findfile('zipdir.zip')
+        zip_name = findfile('zipdir.zip', subdir='archivetestdata')
         t = io.StringIO()
         with zipfile.ZipFile(zip_name, 'r') as tf:
             tf.printdir(t)
@@ -3015,7 +3015,7 @@ def test_create_command(self):
                 unlink(TESTFN2)
 
     def test_extract_command(self):
-        zip_name = findfile('zipdir.zip')
+        zip_name = findfile('zipdir.zip', subdir='archivetestdata')
         for opt in '-e', '--extract':
             with temp_dir() as extdir:
                 out = self.zipfilecmd(opt, zip_name, extdir)
@@ -3036,8 +3036,8 @@ class TestExecutablePrependedZip(unittest.TestCase):
     """Test our ability to open zip files with an executable prepended."""
 
     def setUp(self):
-        self.exe_zip = findfile('exe_with_zip', subdir='ziptestdata')
-        self.exe_zip64 = findfile('exe_with_z64', subdir='ziptestdata')
+        self.exe_zip = findfile('exe_with_zip', subdir='archivetestdata')
+        self.exe_zip64 = findfile('exe_with_z64', subdir='archivetestdata')
 
     def _test_zip_works(self, name):
         # bpo28494 sanity check: ensure is_zipfile works on these.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 2950d87..20f2f6b 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -2169,6 +2169,7 @@
 TESTSUBDIRS=	idlelib/idle_test \
 		test \
 		test/audiodata \
+		test/archivetestdata \
 		test/certdata \
 		test/certdata/capath \
 		test/cjkencodings \
@@ -2283,8 +2284,7 @@
 		test/tracedmodules \
 		test/typinganndata \
 		test/xmltestdata \
-		test/xmltestdata/c14n-20 \
-		test/ziptestdata
+		test/xmltestdata/c14n-20
 
 COMPILEALL_OPTS=-j0