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

Part 3 of 3, continuing PR #7689. This covers 14 idlelib modules and their tests,
rpc to zoomheight except for run (already done) and tooltip (being done separately).

1 files changed, 39 insertions, 0 deletions

diff --git a/Lib/idlelib/idle_test/test_zoomheight.py b/Lib/idlelib/idle_test/test_zoomheight.py
new file mode 100644
index 0000000000..bac86ac249
--- /dev/null
+++ b/Lib/idlelib/idle_test/test_zoomheight.py
@@ -0,0 +1,39 @@
+"Test zoomheight, coverage 66%."
+# Some code is system dependent.
+
+from idlelib import zoomheight
+import unittest
+from test.support import requires
+from tkinter import Tk, Text
+from idlelib.editor import EditorWindow
+
+
+class Test(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        requires('gui')
+        cls.root = Tk()
+        cls.root.withdraw()
+        cls.editwin = EditorWindow(root=cls.root)
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.editwin._close()
+        cls.root.update_idletasks()
+        for id in cls.root.tk.call('after', 'info'):
+            cls.root.after_cancel(id)  # Need for EditorWindow.
+        cls.root.destroy()
+        del cls.root
+
+    def test_init(self):
+        zoom = zoomheight.ZoomHeight(self.editwin)
+        self.assertIs(zoom.editwin, self.editwin)
+
+    def test_zoom_height_event(self):
+        zoom = zoomheight.ZoomHeight(self.editwin)
+        zoom.zoom_height_event()
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)