    @Test
    public void isPassed() {

        assertFalse("Before fork", forkState.isPassed(50));
        assertFalse("Fork started", forkState.isPassed(100));
        assertFalse("On fork", forkState.isPassed(150));
        assertFalse("Fork ended", forkState.isPassed(200));
        assertTrue("After fork", forkState.isPassed(250));
    }