gh-128846: Add check_tk_version function to test.support

Lib/test/support/__init__.py

@@ -2992,3 +2992,16 @@ def is_libssl_fips_mode():
     except ImportError:
         return False  # more of a maybe, unless we add this to the _ssl module.
     return get_fips_mode() != 0
+
+
+def check_tk_version():
+    from .import_helper import import_module
+    import_module('_tkinter')
+    import tkinter
+    tcl = tkinter.Tcl()
+    major, minor, micro = tcl.call("info", "patchlevel").split(".")
+    version = f"{int(major):02d}{int(minor):02d}{int(micro):02d}"
+    # update max version number as necessary
+    if version > "080699":
+        raise unittest.SkipTest(f"Tk version {major}.{minor}.{micro}"
+                                " not supported")

Lib/test/test_tkinter/__init__.py

@@ -6,6 +6,7 @@
     import_helper,
     load_package_tests,
     requires,
+    check_tk_version,
     )
 
 
@@ -19,6 +20,16 @@
 # Skip test if tk cannot be initialized.
 requires('gui')
 
+# Skip test if tk version is too new.
+check_tk_version()
+
+
+import tkinter
+tcl = tkinter.Tcl()
+major, minor, micro = tcl.call("info", "patchlevel").split(".")
+version = f"{int(major):02d}{int(minor):02d}{int(micro):02d}"
+if version > "080699":
+    raise unittest.SkipTest(f"Tk version {major}.{minor}.{micro} not supported")
 
 def load_tests(*args):
     return load_package_tests(os.path.dirname(__file__), *args)

Lib/test/test_ttk/__init__.py

@@ -13,12 +13,21 @@
 # Skip test if tk cannot be initialized.
 support.requires('gui')
 
+# Skip test if tk version is too new.
+support.check_tk_version()
 
 import tkinter
 from _tkinter import TclError
 from tkinter import ttk
 
 
+tcl = tkinter.Tcl()
+major, minor, micro = tcl.call("info", "patchlevel").split(".")
+version = f"{int(major):02d}{int(minor):02d}{int(micro):02d}"
+if version > "080699":
+    raise unittest.SkipTest(f"Tk version {major}.{minor}.{micro} not supported")
+
+
 def setUpModule():
     root = None
     try:

Lib/test/test_ttk_textonly.py

@@ -1,8 +1,10 @@
-from test.support import import_helper
+from test.support import import_helper, check_tk_version
 
 # Skip this test if _tkinter does not exist.
 import_helper.import_module('_tkinter')
 
+check_tk_version()
+
 import unittest
 from tkinter import ttk