Issue #21477: Idle htest: merge and modify run and runall; add many tests.

Patch by Saimadhav Heblikar

Lib/idlelib/dynOptionMenuWidget.py

@@ -2,9 +2,10 @@
 OptionMenu widget modified to allow dynamic menu reconfiguration
 and setting of highlightthickness
 """
-from tkinter import OptionMenu
-from tkinter import _setit
+from tkinter import OptionMenu, _setit, Tk, StringVar, Button
+
 import copy
+import re
 
 class DynOptionMenu(OptionMenu):
     """
@@ -33,3 +34,24 @@ class DynOptionMenu(OptionMenu):
                     command=_setit(self.variable,item,self.command))
         if value:
             self.variable.set(value)
+
+def _dyn_option_menu(parent):
+    root = Tk()
+    root.title("Tets dynamic option menu")
+    var = StringVar(root)
+    width, height, x, y = list(map(int, re.split('[x+]', parent.geometry())))
+    root.geometry("+%d+%d"%(x, y + 150))
+    var.set("Old option set") #Set the default value
+    dyn = DynOptionMenu(root,var, "old1","old2","old3","old4")
+    dyn.pack()
+
+    def update():
+        dyn.SetMenu(["new1","new2","new3","new4"],value="new option set")
+
+    button = Button(root, text="Change option set", command=update)
+    button.pack()
+    root.mainloop()
+
+if __name__ == '__main__':
+    from idlelib.idle_test.htest import run
+    run(_dyn_option_menu)