tests: add testcase for #314

This should be fixed by merging #364.

Thanks @tryone144 for pointing out the root cause.

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

tests/configs/issue314.conf

@@ -0,0 +1,6 @@
+fading = true
+fade-in-step = 1
+fade-out-step = 0.01
+inactive-opacity = 0
+blur-background = true
+force-win-blend = true

tests/run_tests.sh

@@ -9,3 +9,4 @@ cd $(dirname $0)
 ./run_one_test.sh $exe configs/issue239_2.conf testcases/issue239_2.py
 ./run_one_test.sh $exe configs/issue239_3.conf testcases/issue239_3.py
 ./run_one_test.sh $exe configs/issue239_3.conf testcases/issue239_3_norefresh.py
+./run_one_test.sh $exe configs/issue314.conf testcases/issue314.py

tests/testcases/issue314.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+
+import xcffib.xproto as xproto
+import xcffib
+import time
+from common import set_window_name, trigger_root_configure
+
+conn = xcffib.connect()
+setup = conn.get_setup()
+root = setup.roots[0].root
+visual = setup.roots[0].root_visual
+depth = setup.roots[0].root_depth
+x = xproto.xprotoExtension(conn)
+
+# issue 239 is caused by a window gaining a shadow during its fade-out transition
+wid1 = conn.generate_id()
+print("Window 1: ", hex(wid1))
+wid2 = conn.generate_id()
+print("Window 1: ", hex(wid2))
+
+# Create windows
+conn.core.CreateWindowChecked(depth, wid1, root, 0, 0, 100, 100, 0, xproto.WindowClass.InputOutput, visual, 0, []).check()
+conn.core.CreateWindowChecked(depth, wid2, root, 0, 0, 100, 100, 0, xproto.WindowClass.InputOutput, visual, 0, []).check()
+
+# Set Window names
+set_window_name(conn, wid1, "Test window 1")
+set_window_name(conn, wid2, "Test window 2")
+
+print("mapping 1")
+conn.core.MapWindowChecked(wid1).check()
+print("mapping 2")
+conn.core.MapWindowChecked(wid2).check()
+
+time.sleep(0.5)
+
+x.SetInputFocusChecked(0, wid1, xproto.Time.CurrentTime).check()
+
+time.sleep(0.5)
+
+# Destroy the windows
+conn.core.DestroyWindowChecked(wid1).check()
+
+x.SetInputFocusChecked(0, wid2, xproto.Time.CurrentTime).check()
+time.sleep(1)
+conn.core.DestroyWindowChecked(wid2).check()