    @Test
    void testBegin() {

        try {
            StateInterval interval = fixture.doSingularQuery(0, 0);
            assertNotNull(interval);
            assertEquals(0, interval.getStart());
            assertEquals(90, interval.getEnd());
            assertEquals(0, ((IntegerStateValue) interval.getStateValue()).getValue());

        } catch (TimeRangeException | AttributeNotFoundException | StateSystemDisposedException e) {
            fail(e.getMessage());
        }
    }