bpo-17535: IDLE editor line numbers (GH-14030)

1 files changed, 14 insertions, 0 deletions

diff --git a/Lib/idlelib/idle_test/htest.py b/Lib/idlelib/idle_test/htest.py
index 20e5e90..f2f37e1 100644
--- a/Lib/idlelib/idle_test/htest.py
+++ b/Lib/idlelib/idle_test/htest.py
@@ -67,6 +67,7 @@ outwin.OutputWindow (indirectly being tested with grep test)
 
 import idlelib.pyshell  # Set Windows DPI awareness before Tk().
 from importlib import import_module
+import textwrap
 import tkinter as tk
 from tkinter.ttk import Scrollbar
 tk.NoDefaultRoot()
@@ -205,6 +206,19 @@ _io_binding_spec = {
            "Check that changes were saved by opening the file elsewhere."
     }
 
+_linenumbers_drag_scrolling_spec = {
+    'file': 'sidebar',
+    'kwds': {},
+    'msg': textwrap.dedent("""\
+        Click on the line numbers and drag down below the edge of the
+        window, moving the mouse a bit and then leaving it there for a while.
+        The text and line numbers should gradually scroll down, with the
+        selection updated continuously.
+        Do the same as above, dragging to above the window. The text and line
+        numbers should gradually scroll up, with the selection updated
+        continuously."""),
+    }
+
 _multi_call_spec = {
     'file': 'multicall',
     'kwds': {},