Unit tests for priority queue

Below are unit tests for priority queue written during the lab:

import static org.junit.Assert.*;
import java.util.ArrayList;
import java.util.NoSuchElementException;
import org.junit.Test;

public class UnitTests {
	@Test
	public void testIsEmpty() {
		OurQueue<String> queue = new OurPriorityQueue<String>();
		assertTrue(queue.isEmpty());
		queue.add("food");
		assertFalse(queue.isEmpty());

	}

	@Test
	public void testSize() {
		OurQueue<String> queue = new OurPriorityQueue<String>();
		assertEquals(0, queue.size());
		queue.add("food");
		assertEquals(1, queue.size());
		queue.add("apple");
		assertEquals(2, queue.size());
		queue.add("spork");
		assertEquals(3, queue.size());
	}

	@Test
	public void singleItemTest() {
		OurQueue<String> queue = new OurPriorityQueue<String>();
		queue.add("kiwi");
		assertEquals("kiwi", queue.element());
		assertEquals(1, queue.size());
		assertFalse(queue.isEmpty());
	}

	@Test
	public void testElement() {
		OurQueue<String> queue = new OurPriorityQueue<String>();
		queue.add("boo");
		queue.add("achoo");
		assertEquals("achoo", queue.element());
		assertEquals("achoo", queue.element());
	}

	@Test
	public void threeItemsTest() {
		OurQueue<String> queue = new OurPriorityQueue<String>();
		queue.add("kiwi");
		queue.add("apple");
		queue.add("orange");

		assertTrue(queue.isEmpty());
		assertEquals(3, queue.size());
		assertEquals("apple", queue.element());
	}

	@Test
	public void iteratorTest() {
		OurQueue<String> queue = new OurPriorityQueue<String>();
		queue.add("kiwi");
		queue.add("apple");
		queue.add("orange");

		String[] expected = { "apple", "kiwi", "orange" };
		int i = 0;

		for (String fruit : queue) {
			assertEquals(expected[i++], fruit);
		}
	}

	@Test
	public void testIterator2() {
		OurQueue<String> queue = new OurPriorityQueue<String>();
		queue.add("apples");
		queue.add("kiwi");
		queue.add("banana");

		ArrayList<String> fruit1 = new ArrayList<String>();
		fruit1.add("apples");
		fruit1.add("banana");
		fruit1.add("kiwi");

		ArrayList<String> fruit2 = new ArrayList<String>();
		for (String fruit : queue) {
			fruit2.add(fruit);
		}

		assertEquals(fruit1, fruit2);
	}

	@Test
	public void removeTest() {
		OurQueue<String> queue = new OurPriorityQueue<String>();
		queue.add("kiwi");
		queue.add("apple");
		queue.add("orange");

		assertEquals("apple", queue.remove());
		assertEquals(2, queue.size());

		assertEquals("kiwi", queue.element());
		assertEquals("kiwi", queue.remove());
		assertEquals(1, queue.size());

		assertEquals("orange", queue.remove());
		assertTrue(queue.isEmpty());
		assertEquals(0, queue.size());
	}

	@Test
	public void testIterator() {
		OurQueue<Integer> queue = new OurPriorityQueue<Integer>();
		int testSum = 0;
		queue.add(1);
		queue.add(2);
		queue.add(3);

		for (int element : queue) {
			testSum = testSum + element;
		}
		assertEquals(6, testSum);
	}

	@Test(expected = NoSuchElementException.class)
	public void testNoSuchElementException() throws NoSuchElementException {
		OurQueue<String> queue = new OurPriorityQueue<String>();
		queue.remove();
	}

}

CSci 2101 course web site.