SDL: Fix video_getSetWindowGrab(): need to raise the window, and wait for focus gained

SDL Commits
1 
From f30a182de2e5a610ee396875846bbae87cbb6f9d Mon Sep 17 00:00:00 2001
From: Sylvain <[EMAIL REDACTED]>
Date: Mon, 20 Mar 2023 12:34:36 +0100
Subject: [PATCH] Fix video_getSetWindowGrab(): need to raise the window, and
 wait for focus gained

---
 test/testautomation_video.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/test/testautomation_video.c b/test/testautomation_video.c
index 8d16bddaad72..776047c1846f 100644
--- a/test/testautomation_video.c
+++ b/test/testautomation_video.c
@@ -501,6 +501,7 @@ static int video_getSetWindowGrab(void *arg)
     const char *title = "video_getSetWindowGrab Test Window";
     SDL_Window *window;
     SDL_bool originalMouseState, originalKeyboardState;
+    SDL_bool hasFocusGained = SDL_FALSE;
 
     /* Call against new test window */
     window = createVideoSuiteTestWindow(title);
@@ -508,6 +509,23 @@ static int video_getSetWindowGrab(void *arg)
         return TEST_ABORTED;
     }
 
+    /* Need to raise the window to have and SDL_EVENT_WINDOW_FOCUS_GAINED,
+     * so that the window gets the flags SDL_WINDOW_INPUT_FOCUS,
+     * so that it can be "grabbed" */
+    SDL_RaiseWindow(window);
+
+    {
+        SDL_Event evt;
+        SDL_zero(evt);
+        while (SDL_PollEvent(&evt)) {
+            if (evt.type == SDL_EVENT_WINDOW_FOCUS_GAINED) {
+                hasFocusGained = SDL_TRUE;
+            }
+        }
+    }
+
+    SDLTest_AssertCheck(hasFocusGained == SDL_TRUE, "Expectded window with focus");
+
     /* Get state */
     originalMouseState = SDL_GetWindowMouseGrab(window);
     SDLTest_AssertPass("Call to SDL_GetWindowMouseGrab()");