bpo-33855: Still more edits and minimal tests for IDLE  (GH-7784)


Part 3 of 3, continuing PR GH-7689. This covers 14 idlelib modules and their tests,
rpc to zoomheight except for run (already done) and tooltip (being done separately).
(cherry picked from commit 4d92158f4c3917fc4fbfebff15224e74782abf79)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/zoomheight.py b/Lib/idlelib/zoomheight.py
index 74fbc88..73f1df0 100644
--- a/Lib/idlelib/zoomheight.py
+++ b/Lib/idlelib/zoomheight.py
@@ -11,7 +11,7 @@
     def __init__(self, editwin):
         self.editwin = editwin
 
-    def zoom_height_event(self, event):
+    def zoom_height_event(self, event=None):
         top = self.editwin.top
         zoom_height(top)
         return "break"
@@ -46,3 +46,10 @@
     else:
         newgeom = "%dx%d+%d+%d" % (width, newheight, x, newy)
     top.wm_geometry(newgeom)
+
+
+if __name__ == "__main__":
+    from unittest import main
+    main('idlelib.idle_test.test_zoomheight', verbosity=2, exit=False)
+
+    # Add htest?