tests: add a repro for #1091

Signed-off-by: Yuxuan Shui <[email protected]>

tests/configs/pull1091.conf

@@ -0,0 +1 @@
+unredir-if-possible = true;

tests/testcases/common.py

@@ -33,6 +33,10 @@ def set_window_size_async(conn, wid, width, height):
     value_list = [width, height]
     return conn.core.ConfigureWindowChecked(wid, value_mask, value_list)
 
+def set_window_bypass_compositor(conn, wid, value = 1):
+    prop_name = to_atom(conn, "_NET_WM_BYPASS_COMPOSITOR")
+    conn.core.ChangePropertyChecked(xproto.PropMode.Replace, wid, prop_name, xproto.Atom.CARDINAL, 32, 1, [value]).check()
+
 def find_picom_window(conn):
     prop_name = to_atom(conn, "WM_NAME")
     setup = conn.get_setup()

tests/testcases/pull1091.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+
+import xcffib.xproto as xproto
+import xcffib
+from common import *
+
+conn = xcffib.connect()
+setup = conn.get_setup()
+root = setup.roots[0].root
+visual = setup.roots[0].root_visual
+depth = setup.roots[0].root_depth
+
+# assertion failure mentioned in 1091 happens when a root change happens right after we
+# redirected the screen, before we have even rendered a single frame
+wid = conn.generate_id()
+print("Window id is ", hex(wid))
+
+# Create a window
+conn.core.CreateWindowChecked(depth, wid, root, 0, 0, 100, 100, 0, xproto.WindowClass.InputOutput, visual, 0, []).check()
+
+# Map the window
+print("mapping")
+conn.core.MapWindowChecked(wid).check()
+
+time.sleep(0.5)
+
+set_window_bypass_compositor(conn, wid)
+
+time.sleep(0.5)
+
+set_window_bypass_compositor(conn, wid, 0)
+reply, mode, output = prepare_root_configure(conn)
+trigger_root_configure(conn, reply, mode, output)
+
+time.sleep(2)