@Test
public void testNoLayerIdRequest() throws Exception {

	GetRasterTilesRequest request = new GetRasterTilesRequest();
	request.setCrs(CRS);
	GetRasterTilesResponse response = (GetRasterTilesResponse) dispatcher.execute(
			GetRasterTilesRequest.COMMAND, request, null, "en");
	Assert.assertTrue(response.isError());
	Assert.assertTrue(response.getErrors().get(0) instanceof GeomajasException);
	Assert.assertEquals(ExceptionCode.PARAMETER_MISSING,
			((GeomajasException) response.getErrors().get(0)).getExceptionCode());
}