Unit tests for priority queue

The starting point for unit tests for priority queue.

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("apple");
		queue.add("banana");
		assertEquals("apple", queue.element());
		assertEquals("apple", queue.element());
	}

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

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

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

}

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