@Test
public void testIncorrectNumberOfMaps() throws IOException, URISyntaxException {

    URL illegalFile = createOneMapTooMuchUrl();
    try {
        loader.load(illegalFile);
        fail("OperatorException expected");
    } catch (OperatorException ignored) {
    }
    illegalFile = createMapOverlapUrl();
    try {
        loader.load(illegalFile);
        fail("OperatorException expected");
    } catch (OperatorException ignored) {
    }
    illegalFile = create_A_and_D_Url();
    try {
        loader.load(illegalFile);
        fail("OperatorException expected");
    } catch (OperatorException ignored) {
    }
}