LoopIteratorTest.java

// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
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// 2. Redistributions in binary form must reproduce the above copyright
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package jodd.util;

import org.junit.Test;

import static org.junit.Assert.*;

public class LoopIteratorTest {

	@Test
	public void testUp() {
		LoopIterator ls = new LoopIterator(1, 5);

		assertTrue(ls.next());    // jump to 1
		assertTrue(ls.isFirst());
		assertFalse(ls.isLast());
		assertEquals(1, ls.getValue());
		assertEquals(1, ls.getCount());
		assertFalse(ls.isEven());
		assertTrue(ls.isOdd());
		assertEquals(1, ls.getModulus());
		assertEquals(0, ls.getIndexModulus());

		assertTrue(ls.next());    // 2
		assertTrue(ls.next());    // 3
		assertTrue(ls.next());    // 4
		assertTrue(ls.next());    // jump to 5

		assertFalse(ls.isFirst());
		assertTrue(ls.isLast());
		assertEquals(5, ls.getValue());
		assertEquals(5, ls.getCount());
		assertFalse(ls.isEven());
		assertTrue(ls.isOdd());
		assertEquals(1, ls.getModulus());
		assertEquals(0, ls.getIndexModulus());

		assertFalse(ls.next());

		ls.reset();

		assertTrue(ls.next());
		assertTrue(ls.isFirst());
		assertFalse(ls.isLast());
		assertEquals(1, ls.getValue());
		assertEquals(1, ls.getCount());
		assertFalse(ls.isEven());
		assertTrue(ls.isOdd());
		assertEquals(1, ls.getModulus());
		assertEquals(0, ls.getIndexModulus());
	}

	@Test
	public void testDown() {
		LoopIterator ls = new LoopIterator(5, 1, -1);

		assertTrue(ls.next());    // jump to 5
		assertTrue(ls.isFirst());
		assertFalse(ls.isLast());
		assertEquals(5, ls.getValue());
		assertEquals(1, ls.getCount());
		assertFalse(ls.isEven());
		assertTrue(ls.isOdd());
		assertEquals(1, ls.getModulus());
		assertEquals(0, ls.getIndexModulus());

		assertTrue(ls.next());
		assertTrue(ls.next());
		assertTrue(ls.next());
		assertTrue(ls.next());    // jump to 1

		assertFalse(ls.isFirst());
		assertTrue(ls.isLast());
		assertEquals(1, ls.getValue());
		assertEquals(5, ls.getCount());
		assertFalse(ls.isEven());
		assertTrue(ls.isOdd());
		assertEquals(1, ls.getModulus());
		assertEquals(0, ls.getIndexModulus());

		assertFalse(ls.next());

		ls.reset();

		assertTrue(ls.next());
		assertTrue(ls.isFirst());
		assertFalse(ls.isLast());
		assertEquals(5, ls.getValue());
		assertEquals(1, ls.getCount());
		assertFalse(ls.isEven());
		assertTrue(ls.isOdd());
		assertEquals(1, ls.getModulus());
		assertEquals(0, ls.getIndexModulus());
	}

	@Test
	public void testSingle() {
		LoopIterator ls = new LoopIterator(1, 5, 20, 10);
		assertTrue(ls.next());
		assertTrue(ls.isFirst());
		assertTrue(ls.isLast());
		assertEquals(1, ls.getValue());
		assertEquals(1, ls.getCount());
		assertFalse(ls.isEven());
		assertTrue(ls.isOdd());
		assertEquals(1, ls.getModulus());
		assertFalse(ls.next());

		ls = new LoopIterator(1, 1);
		assertTrue(ls.next());
		assertTrue(ls.isFirst());
		assertTrue(ls.isLast());
		assertEquals(1, ls.getValue());
		assertEquals(1, ls.getCount());
		assertFalse(ls.isEven());
		assertTrue(ls.isOdd());
		assertEquals(1, ls.getModulus());
		assertFalse(ls.next());

		ls = new LoopIterator(1, 1, -1);
		assertTrue(ls.next());
		assertTrue(ls.isFirst());
		assertTrue(ls.isLast());
		assertEquals(1, ls.getValue());
	}

	@Test
	public void testNone() {
		LoopIterator ls = new LoopIterator(2, 1);
		assertFalse(ls.next());

		ls = new LoopIterator(1, 3, -1);
		assertFalse(ls.next());
	}
}