BTIntervalTest.java

package com.limegroup.bittorrent;

import junit.framework.Test;

import com.limegroup.gnutella.util.LimeTestCase;

public class BTIntervalTest extends LimeTestCase {

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

    public static Test suite() {
        return buildTestSuite(BTIntervalTest.class);
    }

    public void testEquals() throws Exception {
        BTInterval a = new BTInterval(1, 2, 3);
        BTInterval b = new BTInterval(1, 2, 3);
        assertEquals(a, b);
        assertEquals(3, a.getId());
        assertEquals(3, b.getId());

        b = new BTInterval(1, 1, 3);
        assertNotEquals(a, b);
        b = new BTInterval(1, 2, 4);
        assertNotEquals(a, b);

        assertNotEquals(a, "test");

        try {
            new BTInterval(1, 1, -2);
            fail("Should not be able to supply a negative id.");
        } catch (IllegalArgumentException e) {
            // expected
        }
    }

    public void testGet32Bit() throws Exception {
        BTInterval large = new BTInterval(Integer.MAX_VALUE + 5L, Integer.MAX_VALUE + 10L, 1);
        assertEquals(Integer.MAX_VALUE + 5, large.get32BitLow());
        assertEquals(Integer.MAX_VALUE + 10, large.get32BitHigh());

        // test that binary representation is identical
        large = new BTInterval(0xFFFFFFF0L, 0xFFFFFFFFL, 1);
        assertEquals(0xFFFFFFF0, large.get32BitLow());
        assertEquals(0xFFFFFFFF, large.get32BitHigh());

        // test that length is Integer.MAX_VALUE + 6 (inclusive).
        large = new BTInterval(2L * Integer.MAX_VALUE, 3L * Integer.MAX_VALUE + 5, 1);
        assertEquals(Integer.MAX_VALUE + 6, large.get32BitLength());
    }

    public void testToString() throws Exception {
        BTInterval a = new BTInterval(1, 2, 3);
        String aString = a.toString();
        assertEquals("3:1-2", aString);
    }
}