tests: add a repro for #1091

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>

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()
@@ -45,13 +49,13 @@ def find_picom_window(conn):
         if name.value.buf() == b"picom":
             return w
 
-def prepare_root_configure(conn):
+def prepare_root_configure(conn, size = 1000):
     setup = conn.get_setup()
     root = setup.roots[0].root
     # Xorg sends root ConfigureNotify when we add a new mode to an output
     rr = conn(randr.key)
     name = ''.join([random.choice(string.ascii_letters + string.digits) for n in range(0, 32)])
-    mode_info = randr.ModeInfo.synthetic(id = 0, width = 1000, height = 1000, dot_clock = 0,
+    mode_info = randr.ModeInfo.synthetic(id = 0, width = size, height = size, dot_clock = 0,
             hsync_start = 0, hsync_end = 0, htotal = 0, hskew = 0, vsync_start = 0, vsync_end = 0,
             vtotal = 0, name_len = len(name), mode_flags = 0)
 

tests/testcases/issue314.py

@@ -3,7 +3,7 @@
 import xcffib.xproto as xproto
 import xcffib
 import time
-from common import set_window_name, trigger_root_configure
+from common import set_window_name
 
 conn = xcffib.connect()
 setup = conn.get_setup()

tests/testcases/pull1091.py

@@ -0,0 +1,41 @@
+#!/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)
+
+for i in range(0, 8):
+	modes = []
+	for s in range(0, 10):
+		reply, mode, output = prepare_root_configure(conn, i * 100 + 100 + s)
+		modes.append((reply, mode, output))
+
+	set_window_bypass_compositor(conn, wid).check()
+	time.sleep(0.1)
+
+	set_window_bypass_compositor(conn, wid, 0)
+	conn.flush()
+	for reply, mode, output in modes:
+		trigger_root_configure(conn, reply, mode, output).reply()
+
+	time.sleep(0.1)