@Test
public void iterator() {
Interval zero = Interval.zero();
Iterator<Integer> zeroIterator = zero.iterator();
Assert.assertTrue(zeroIterator.hasNext());
Assert.assertEquals(Integer.valueOf(0), zeroIterator.next());
Assert.assertFalse(zeroIterator.hasNext());
Interval oneToFive = Interval.oneTo(5);
Iterator<Integer> oneToFiveIterator = oneToFive.iterator();
for (int i = 1; i < 6; i++) {
Assert.assertTrue(oneToFiveIterator.hasNext());
Assert.assertEquals(Integer.valueOf(i), oneToFiveIterator.next());
}
Verify.assertThrows(NoSuchElementException.class, (Runnable) oneToFiveIterator::next);
Interval threeToNegativeThree = Interval.fromTo(3, -3);
Iterator<Integer> threeToNegativeThreeIterator = threeToNegativeThree.iterator();
for (int i = 3; i > -4; i--) {
Assert.assertTrue(threeToNegativeThreeIterator.hasNext());
Assert.assertEquals(Integer.valueOf(i), threeToNegativeThreeIterator.next());
}
Verify.assertThrows(
NoSuchElementException.class, (Runnable) threeToNegativeThreeIterator::next);
Verify.assertThrows(
UnsupportedOperationException.class, () -> Interval.zeroTo(10).iterator().remove());
}
@Test
public void forEachWithIndex() {
IntegerSum sum = new IntegerSum(0);
Interval.oneTo(5)
.forEachWithIndex((ObjectIntProcedure<Integer>) (each, index) -> sum.add(each + index));
Assert.assertEquals(25, sum.getIntSum());
IntegerSum zeroSum = new IntegerSum(0);
Interval.fromTo(0, -4)
.forEachWithIndex((ObjectIntProcedure<Integer>) (each, index) -> zeroSum.add(each + index));
Assert.assertEquals(0, zeroSum.getIntSum());
Verify.assertThrows(
IndexOutOfBoundsException.class, () -> Interval.zeroTo(10).forEachWithIndex(null, -1, 10));
}
@Test
public void contains() {
Assert.assertTrue(Interval.zero().contains(0));
Assert.assertTrue(Interval.oneTo(5).containsAll(1, 5));
Assert.assertTrue(Interval.oneTo(5).containsNone(6, 7));
Assert.assertFalse(Interval.oneTo(5).containsAll(1, 6));
Assert.assertFalse(Interval.oneTo(5).containsNone(1, 6));
Assert.assertFalse(Interval.oneTo(5).contains(0));
Assert.assertTrue(Interval.fromTo(-1, -5).containsAll(-1, -5));
Assert.assertFalse(Interval.fromTo(-1, -5).contains(1));
Assert.assertTrue(Interval.zero().contains(Integer.valueOf(0)));
Assert.assertFalse(Interval.oneTo(5).contains(Integer.valueOf(0)));
Assert.assertFalse(Interval.fromTo(-1, -5).contains(Integer.valueOf(1)));
Assert.assertFalse(Interval.zeroTo(5).contains(new Object()));
}
@Test
public void equalsAndHashCode() {
Interval interval1 = Interval.oneTo(5);
Interval interval2 = Interval.oneTo(5);
Interval interval3 = Interval.zeroTo(5);
Verify.assertPostSerializedEqualsAndHashCode(interval1);
Verify.assertEqualsAndHashCode(interval1, interval2);
Assert.assertNotEquals(interval1, interval3);
Assert.assertNotEquals(interval3, interval1);
Verify.assertEqualsAndHashCode(Interval.fromToBy(1, 5, 2), Interval.fromToBy(1, 6, 2));
Verify.assertEqualsAndHashCode(FastList.newListWith(1, 2, 3), Interval.fromTo(1, 3));
Verify.assertEqualsAndHashCode(FastList.newListWith(3, 2, 1), Interval.fromTo(3, 1));
Assert.assertNotEquals(FastList.newListWith(1, 2, 3, 4), Interval.fromTo(1, 3));
Assert.assertNotEquals(FastList.newListWith(1, 2, 4), Interval.fromTo(1, 3));
Assert.assertNotEquals(FastList.newListWith(3, 2, 0), Interval.fromTo(3, 1));
Verify.assertEqualsAndHashCode(FastList.newListWith(-1, -2, -3), Interval.fromTo(-1, -3));
}
