File: TestQueue.java

Project: Connascence and Java 

// TestQueue -- Test Case forQueue

import junit.framework.TestCase;
import junit.framework.TestSuite;
import junit.framework.Test;

public class TestQueue
    extends TestCase
{
    // JUnit Framework -----------------------------------------------

    public TestQueue (String name) { super (name); }

    public static Test suite () {
        TestSuite suite = new TestSuite (TestQueue.class);
        return suite;
    }

    protected void setUp () {
	q = new Queue();
    }

    protected void tearDown () {
	q = null;
    }

    // Test Data -----------------------------------------------------

    Queue q;

    // Tests ---------------------------------------------------------

    public void testCreation () {
        assert ("created", q != null);
    }

    public void testOne () throws Exception {
	q.add(12);
	assertEquals(12, q.get());
    }

    public void testSeveral () throws Exception {
	q.add(1);
	q.add(2);
	q.add(3);
	q.add(4);
	assertEquals(1, q.get());
	assertEquals(2, q.get());
	assertEquals(3, q.get());
	assertEquals(4, q.get());
    }

    public void testSize () throws Exception {
	q = new Queue(3);
	q.add(1);
	q.add(2);
	q.add(3);
	assert (q.isFull());
	assertEquals(1, q.get());
	assertEquals(2, q.get());
	assertEquals(3, q.get());
	assert (q.isEmpty());
    }	

    public void testOverflow () throws Exception {
	boolean caught = false;
	q = new Queue(3);
	q.add(1);
	q.add(2);
	q.add(3);
	try {
	    q.add(4);
	}
	catch (QueueException e) {
	    caught = true;
	}
	assert (caught);
    }

    public void testUnderflow () throws Exception {
	boolean caught = false;
	q = new Queue(3);
	try {
	    q.get();
	}
	catch (QueueException e) {
	    caught = true;
	}
	assert (caught);
    }

    public void testRollover () throws Exception {
	q = new Queue(3);
	for (int i=1; i<10; ++i) {
	    q.add(1);
	    q.add(2);
	    q.add(3);
	    assertEquals(1, q.get());
	    assertEquals(2, q.get());
	    assertEquals(3, q.get());
	}
    }
}

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