Examples of org.fishwife.jrugged.interval.DiscreteInterval

org.fishwife.jrugged.interval.DiscreteInterval
Representation of integer (long) intervals and associated arithmetic. This is useful for representing numbers with inherent measurement error or uncertainty; instead of a single value or a single value with a +/- error, we represent this as a range of values. One of the interesting properties of interval arithmetic is that errors are monotonically nondecreasing as you perform additional operations on them.

    }


    @Test
    public void isNotLateIfCurrentClockReadingIsPartiallyBeforeTargetRange() {
        expect(mockClock.getGranularity()).andReturn(1L).anyTimes();
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(4L,5L));
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(200L,1006L)).anyTimes();
        replay(mockClock);
        impl.set(1000L,100L);
        impl.start();
        assertFalse(impl.isLate());
        verify(mockClock);

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    }


    @Test
    public void isNotLateIfCurrentClockReadingIsWithinTargetRange() {
        expect(mockClock.getGranularity()).andReturn(1L).anyTimes();
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(4L,5L));
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(1005L,1006L)).anyTimes();
        replay(mockClock);
        impl.set(1000L,100L);
        impl.start();
        assertFalse(impl.isLate());
        verify(mockClock);

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    }


    @Test
    public void isLateIfCurrentClockReadingIsPartiallyBeyondTargetRange() {
        expect(mockClock.getGranularity()).andReturn(1L).anyTimes();
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(4L,5L));
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(1005L,2006L)).anyTimes();
        replay(mockClock);
        impl.set(1000L,100L);
        impl.start();
        assertTrue(impl.isLate());
        verify(mockClock);

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    }


    @Test
    public void isLateIfCurrentClockReadingIsCompletelyBeyondTargetRange() {
        expect(mockClock.getGranularity()).andReturn(1L).anyTimes();
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(4L,5L));
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(2005L,2006L)).anyTimes();
        replay(mockClock);
        impl.set(1000L,100L);
        impl.start();
        assertTrue(impl.isLate());
        verify(mockClock);

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    }


    @Test
    public void isNotLateIfNotStarted() {
        expect(mockClock.getGranularity()).andReturn(1L).anyTimes();
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(4L,5L)).anyTimes();
        replay(mockClock);
        impl.set(1000L,100L);
        assertFalse(impl.isLate());
        verify(mockClock);
    }

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    }


    @Test
    public void timeRemainingTillElapsedIsDurationIfNotStarted() {
        expect(mockClock.getGranularity()).andReturn(1L).anyTimes();
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(4L,5L)).anyTimes();
        replay(mockClock);
        impl.set(1000L,100L);
        assertEquals(new DiscreteInterval(900L,1100L), impl.getTimeRemaining());
        verify(mockClock);
    }

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    }
    
    @Test(expected=IllegalStateException.class)
    public void cannotAskForRemainingTimeIfNotSet() {
        expect(mockClock.getGranularity()).andReturn(1L).anyTimes();
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(4L,5L)).anyTimes();
        replay(mockClock);
        impl.getTimeRemaining();
    }

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    }
    
    @Test
    public void hasFullTimeRemainingIfClockHasNotTicked() {
        expect(mockClock.getGranularity()).andReturn(1L).anyTimes();
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(4L,5L)).anyTimes();
        replay(mockClock);
        impl.set(1000L,100L);
        impl.start();
        assertEquals(new DiscreteInterval(899L,1101L), impl.getTimeRemaining());
        verify(mockClock);
    }

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    @Test
    public void canComputePartialTimeRemaining() {
        expect(mockClock.getGranularity()).andReturn(1L).anyTimes();
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(4L,5L));
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(504L,505L)).anyTimes();
        replay(mockClock);
        impl.set(1000L,100L);
        impl.start();
        assertEquals(new DiscreteInterval(399L,601L), impl.getTimeRemaining());
        verify(mockClock);
    }

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    }


    @Test
    public void hasZeroTimeRemainingIfElapsed() {
        expect(mockClock.getGranularity()).andReturn(1L).anyTimes();
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(4L,5L));
        expect(mockClock.getNanoTime()).andReturn(new DiscreteInterval(1005L,1006L)).anyTimes();
        replay(mockClock);
        impl.set(1000L,100L);
        impl.start();
        assertEquals(new DiscreteInterval(0L,0L), impl.getTimeRemaining());
        verify(mockClock);
    }

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Related Classes of org.fishwife.jrugged.interval.DiscreteInterval

org.fishwife.jrugged.clocks.DefaultHardwareClock

org.fishwife.jrugged.clocks.TestDefaultHardwareClock

org.fishwife.jrugged.clocks.TestTimer

org.fishwife.jrugged.clocks.Timer

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