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

Patch by Saimadhav Heblikar

Lib/idlelib/MultiCall.py

@@ -420,9 +420,12 @@ def MultiCallCreator(widget):
     _multicall_dict[widget] = MultiCall
     return MultiCall
 
-if __name__ == "__main__":
-    # Test
+
+def _multi_call(parent):
     root = tkinter.Tk()
+    root.title("Test MultiCall")
+    width, height, x, y = list(map(int, re.split('[x+]', parent.geometry())))
+    root.geometry("+%d+%d"%(x, y + 150))
     text = MultiCallCreator(tkinter.Text)(root)
     text.pack()
     def bindseq(seq, n=[0]):
@@ -438,8 +441,13 @@ if __name__ == "__main__":
     bindseq("<Alt-Control-Key-a>")
     bindseq("<Key-b>")
     bindseq("<Control-Button-1>")
+    bindseq("<Button-2>")
     bindseq("<Alt-Button-1>")
     bindseq("<FocusOut>")
     bindseq("<Enter>")
     bindseq("<Leave>")
     root.mainloop()
+
+if __name__ == "__main__":
+    from idlelib.idle_test.htest import run
+    run(_multi_call)