code: @Test public void testAssetsController404() throws Exception {
    AssetsController assetsController=new AssetsController(httpCacheToolkit,mimeTypes,ninjaProperties);
    when(contextRenerable.getRequestPath()).thenReturn("notAvailable");
    Result result2=assetsController.serve(null);
    Renderable renderable=(Renderable)result2.getRenderable();
    Result result=Results.ok();
    renderable.render(contextRenerable,result);
    verify(contextRenerable).finalizeHeadersWithoutFlashAndSessionCookie(resultCaptor.capture());
    assertTrue(resultCaptor.getValue().getStatusCode() == Result.SC_404_NOT_FOUND);
  }
  