1 files changed, 11 insertions, 0 deletions
diff --git a/tests/sdl_canvas.c b/tests/sdl_canvas.c
index 10044ff4..6bd659b8 100644
--- a/tests/sdl_canvas.c
+++ b/tests/sdl_canvas.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <stdlib.h>
 #include <SDL/SDL.h>
 #include <SDL/SDL_ttf.h>
 #include <emscripten.h>
@@ -43,6 +44,16 @@ int main(int argc, char **argv) {
   SDL_Flip(screen); 
 
   SDL_LockSurface(screen);
+
+  int width, height, isFullscreen;
+  emscripten_get_canvas_size(&width, &height, &isFullscreen);
+
+  if (width != 600 && height != 450)
+  {
+    printf("error: wrong width/height\n");
+    abort();
+  }
+
   int sum = 0;
   for (int i = 0; i < screen->h; i++) {
     sum += *((char*)screen->pixels + i*screen->w*4 + i*4 + 0);