@Test
public void evens() {
Interval interval = Interval.evensFromTo(0, 10);
int[] evens = {0, 2, 4, 6, 8, 10};
int[] odds = {1, 3, 5, 7, 9};
this.assertIntervalContainsAll(interval, evens);
this.denyIntervalContainsAny(interval, odds);
Assert.assertEquals(6, interval.size());
Interval reverseInterval = Interval.evensFromTo(10, 0);
this.assertIntervalContainsAll(reverseInterval, evens);
this.denyIntervalContainsAny(reverseInterval, odds);
Assert.assertEquals(6, reverseInterval.size());
Interval negativeInterval = Interval.evensFromTo(-5, 5);
int[] negativeEvens = {-4, -2, 0, 2, 4};
int[] negativeOdds = {-3, -1, 1, 3};
this.assertIntervalContainsAll(negativeInterval, negativeEvens);
this.denyIntervalContainsAny(negativeInterval, negativeOdds);
Assert.assertEquals(5, negativeInterval.size());
Interval reverseNegativeInterval = Interval.evensFromTo(5, -5);
this.assertIntervalContainsAll(reverseNegativeInterval, negativeEvens);
this.denyIntervalContainsAny(reverseNegativeInterval, negativeOdds);
Assert.assertEquals(5, reverseNegativeInterval.size());
}
@Test
public void toSet() {
Interval interval = Interval.evensFromTo(0, 10);
MutableSet<Integer> set = interval.toSet();
Verify.assertContainsAll(set, 0, 2, 4, 6, 8, 10);
Verify.assertSize(6, set);
}
@Test
public void toFastList() {
Interval interval = Interval.evensFromTo(0, 10);
FastList<Integer> toList = (FastList<Integer>) interval.toList();
Verify.assertStartsWith(toList, 0, 2, 4, 6, 8, 10);
Verify.assertSize(6, toList);
}
@Test
public void size() {
Assert.assertEquals(100, Interval.fromTo(1, 100).size());
Assert.assertEquals(50, Interval.fromToBy(1, 100, 2).size());
Assert.assertEquals(34, Interval.fromToBy(1, 100, 3).size());
Assert.assertEquals(25, Interval.fromToBy(1, 100, 4).size());
Assert.assertEquals(20, Interval.fromToBy(1, 100, 5).size());
Assert.assertEquals(17, Interval.fromToBy(1, 100, 6).size());
Assert.assertEquals(15, Interval.fromToBy(1, 100, 7).size());
Assert.assertEquals(13, Interval.fromToBy(1, 100, 8).size());
Assert.assertEquals(12, Interval.fromToBy(1, 100, 9).size());
Assert.assertEquals(10, Interval.fromToBy(1, 100, 10).size());
Assert.assertEquals(11, Interval.fromTo(0, 10).size());
Assert.assertEquals(1, Interval.zero().size());
Assert.assertEquals(11, Interval.fromTo(0, -10).size());
Assert.assertEquals(3, Interval.evensFromTo(2, -2).size());
Assert.assertEquals(2, Interval.oddsFromTo(2, -2).size());
}
@Test
public void testToString() {
Interval interval = Interval.evensFromTo(0, 10);
Assert.assertEquals("Interval from: 0 to: 10 step: 2 size: 6", interval.toString());
}
