add a test that maps an override redirect window

tests/override.c

@@ -0,0 +1,58 @@
+#include <stdio.h>
+#include <X11/Xlib.h>
+
+int main () {
+  XSetWindowAttributes xswa;
+  unsigned long        xswamask;
+  Display   *display;
+  Window     win;
+  XEvent     report;
+  int        x=10,y=10,h=100,w=400;
+
+  display = XOpenDisplay(NULL);
+
+  if (display == NULL) {
+    fprintf(stderr, "couldn't connect to X server :0\n");
+    return 0;
+  }
+
+  xswa.override_redirect = True;
+  xswamask = CWOverrideRedirect;
+
+  win = XCreateWindow(display, RootWindow(display, 0),
+		      x, y, w, h, 10, CopyFromParent, CopyFromParent,
+		      CopyFromParent, xswamask, &xswa);
+
+  XSetWindowBackground(display,win,WhitePixel(display,0)); 
+
+  XMapWindow(display, win);
+  XFlush(display);
+  sleep(1);
+  XUnmapWindow(display, win);
+  XFlush(display);
+  sleep(1);
+  XMapWindow(display, win);
+  XFlush(display);
+
+  XSelectInput(display, win, ExposureMask | StructureNotifyMask);
+
+  while (1) {
+    XNextEvent(display, &report);
+
+    switch (report.type) {
+    case Expose:
+      printf("exposed\n");
+      break;
+    case ConfigureNotify:
+      x = report.xconfigure.x;
+      y = report.xconfigure.y;
+      w = report.xconfigure.width;
+      h = report.xconfigure.height;
+      printf("confignotify %i,%i-%ix%i\n",x,y,w,h);
+      break;
+    }
+
+  }
+
+  return 1;
+}