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/run_tests.sh

@@ -20,3 +20,4 @@ eval `dbus-launch --sh-syntax`
 ./run_one_test.sh $exe configs/clear_shadow_unredirected.conf testcases/redirect_when_unmapped_window_has_shadow.py
 ./run_one_test.sh $exe configs/issue394.conf testcases/issue394.py
 ./run_one_test.sh $exe configs/issue239.conf testcases/issue525.py
+./run_one_test.sh $exe configs/pull1091.conf testcases/pull1091.py

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")
+    return conn.core.ChangePropertyChecked(xproto.PropMode.Replace, wid, prop_name, xproto.Atom.CARDINAL, 32, 1, [value])
+
 def find_picom_window(conn):
     prop_name = to_atom(conn, "WM_NAME")
     setup = conn.get_setup()

tests/testcases/pull1091.py

@@ -0,0 +1,42 @@
+#!/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
+
+selection_name = "_NET_WM_CM_S0"
+selection =  conn.core.InternAtom(0, len(selection_name), selection_name).reply().atom
+
+# 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)
+
+for i in range(0, 100):
+	set_window_bypass_compositor(conn, wid)
+
+	time.sleep(0.5)
+
+	set_window_bypass_compositor(conn, wid, 0)
+	reply, mode, output = prepare_root_configure(conn)
+
+	time.sleep(0.2)
+	r = conn.core.GetSelectionOwner(selection).reply()
+	if r.owner == 0:
+		# picom died
+		break