nametest.java

DNS Java 是java实现的DNS

	public void test_ctor_max_labels() throws TextParseException
	{
	    StringBuffer sb = new StringBuffer();
	    for(int i=0; i<127; ++i){
		sb.append("a.");
	    }
	    Name n = new Name(sb.toString());
	    assertTrue(n.isAbsolute());
	    assertFalse(n.isWild());
	    assertEquals(128, n.labels());
	    assertEquals(255, n.length());
	    for(int i=0; i<127; ++i){
		assertTrue(Arrays.equals(new byte[] { 1, 'a' }, n.getLabel(i)));
		assertEquals("a", n.getLabelString(i));
	    }
	    assertTrue(Arrays.equals(new byte[] { 0 }, n.getLabel(127)));
	    assertEquals("", n.getLabelString(127));
	}

	public void test_ctor_toobig_label_escaped_end() throws TextParseException
	{
	    try {
		// name with a 64 char label containing an escape at the end
		new Name("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\090.b.");
		fail("TextParseException not thrown");
	    }
	    catch(TextParseException e){}
	}

	public void test_ctor_toobig_label_escaped() throws TextParseException
	{
	    try {
		// name with a 64 char label containing an escape at the end
		new Name("aaaaaaaaaaaaaaaaaaaaaaaaaaaa\\001aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.b.");
		fail("TextParseException not thrown");
	    }
	    catch(TextParseException e){}
	}

	public void test_fromString() throws TextParseException
	{
	    Name n = new Name(m_rel, m_abs_origin);
	    Name n2 = Name.fromString(m_rel, m_abs_origin);
	    assertEquals(n, n2);
	}

	public void test_fromString_at() throws TextParseException
	{
	    Name n = Name.fromString("@", m_rel_origin);
	    assertSame(m_rel_origin, n);
	}

	public void test_fromString_dot() throws TextParseException
	{
	    Name n = Name.fromString(".");
	    assertSame(Name.root, n);
	}

	public void test_fromConstantString() throws TextParseException
	{
	    Name n = new Name(m_abs);
	    Name n2 = Name.fromConstantString(m_abs);
	    assertEquals(n, n2);
	}

	public void test_fromConstantString_invalid()
	{
	    try {
		Name.fromConstantString("junk..junk");
		fail("IllegalArgumentException not thrown");
	    }
	    catch(IllegalArgumentException e){}
	}
    }

    public static class Test_DNSInput_init extends TestCase
    {
	public void test_basic() throws IOException, TextParseException, WireParseException
	{
	    
	    final byte[] raw = new byte[]
		{ 3, 'W', 'w', 'w', 7, 'D', 'n', 's', 'J', 'a', 'v', 'a', 3, 'o', 'r', 'g', 0 };
	    Name e = Name.fromString("Www.DnsJava.org.");

	    Name n = new Name(raw);
	    assertEquals(e, n);
	}

	public void test_incomplete() throws IOException
	{
	    try {
		new Name(new byte[] { 3, 'W', 'w', 'w' });
		fail("WireParseException not thrown");
	    }
	    catch(WireParseException e ){}
	}
	
	public void test_root() throws WireParseException
	{
	    final byte[] raw = new byte[] { 0 };
	    Name n = new Name(new DNSInput(raw));
	    assertEquals(Name.root, n);
	}

	public void test_invalid_length() throws IOException
	{
	    try {
		new Name(new byte[] { 4, 'W', 'w', 'w' });
		fail("WireParseException not thrown");
	    }
	    catch(WireParseException e ){}
	}

	public void test_max_label_length() throws TextParseException, WireParseException
	{
	    byte[] raw = new byte[] { 63, 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 0 };
	    Name e = Name.fromString("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb.");
	    
	    Name n = new Name(new DNSInput(raw));
	    assertEquals(e, n);
	}

	public void test_max_name() throws TextParseException, WireParseException
	{
	    // absolute name with three 63-char labels and a 61-char label
	    Name e = new Name("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb.ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc.ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd.");
	    byte[] raw = new byte[] { 63, 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 63, 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 63, 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 61, 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 0 };
	    
	    Name n = new Name(new DNSInput(raw));
	    assertEquals(e, n);
	}

	public void test_toolong_name() throws TextParseException, WireParseException
	{
	    // absolute name with three 63-char labels and a 62-char label
	    byte[] raw = new byte[] { 63, 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 63, 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 'b', 63, 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c', 62, 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 'd', 0 };
	    
	    try {
		new Name(new DNSInput(raw));
		fail("WireParseException not thrown");
	    }
	    catch(WireParseException e ){}
	}

	public void test_max_labels() throws TextParseException, WireParseException
	{
	    byte[] raw = new byte[] { 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 0 };
	    Name e = Name.fromString("a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.");
	    Name n = new Name(new DNSInput(raw));
	    assertEquals(128, n.labels());
	    assertEquals(e, n);
	}

	public void test_toomany_labels() throws TextParseException, WireParseException
	{
	    byte[] raw = new byte[] { 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 1, 'a', 0 };
	    try {
		new Name(new DNSInput(raw));
		fail("WireParseException not thrown");
	    }
	    catch(WireParseException e ){}
	}

	public void test_basic_compression() throws TextParseException, WireParseException
	{
	    byte[] raw = new byte[] { 10, 3, 'a', 'b', 'c', 0, (byte)0xC0, 1 };
	    Name e = Name.fromString("abc.");
	    
	    DNSInput in = new DNSInput(raw);
	    in.jump(6);
	    
	    Options.set("verbosecompression");
	    Name n = new Name(in);
	    Options.unset("verbosecompression");
	    assertEquals(e, n);
	}

	public void test_two_pointer_compression() throws TextParseException, WireParseException
	{
	    byte[] raw = new byte[] { 10, 3, 'a', 'b', 'c', 0, (byte)0xC0, 1, (byte)0xC0, 6 };
	    Name e = Name.fromString("abc.");
	    
	    DNSInput in = new DNSInput(raw);
	    in.jump(8);
	    
	    Name n = new Name(in);
	    assertEquals(e, n);
	}

	public void test_two_part_compression() throws TextParseException, WireParseException
	{
	    byte[] raw = new byte[] { 10, 3, 'a', 'b', 'c', 0, 1, 'B', (byte)0xC0, 1 };
	    Name e = Name.fromString("B.abc.");
	    
	    DNSInput in = new DNSInput(raw);
	    in.jump(6);
	    
	    Name n = new Name(in);
	    assertEquals(e, n);
	}

	public void test_long_jump_compression() throws TextParseException, WireParseException
	{
	    // pointer to name beginning at index 256
	    byte[] raw = new byte[] { 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 3, 'a', 'b', 'c', 0, (byte)0xC1, 0 };
	    Name e = Name.fromString("abc.");
	    
	    DNSInput in = new DNSInput(raw);
	    in.jump(261);
	    Name n = new Name(in);
	    assertEquals(e, n);
	}

	public void test_bad_compression() throws TextParseException, WireParseException
	{
	    byte[] raw = new byte[] { (byte)0xC0, 2, 0 };
	    try {
		new Name(new DNSInput(raw));
		fail("WireParseException not thrown");
	    }
	    catch(WireParseException e ){}
	}

	public void test_basic_compression_state_restore() throws TextParseException, WireParseException
	{
	    byte[] raw = new byte[] { 10, 3, 'a', 'b', 'c', 0, (byte)0xC0, 1, 3, 'd', 'e', 'f', 0 };
	    Name e = Name.fromString("abc.");
	    Name e2 = Name.fromString("def.");
	    
	    DNSInput in = new DNSInput(raw);
	    in.jump(6);
	    
	    Name n = new Name(in);
	    assertEquals(e, n);

	    n = new Name(in);
	    assertEquals(e2, n);
	}

	public void test_two_part_compression_state_restore() throws TextParseException, WireParseException
	{
	    byte[] raw = new byte[] { 10, 3, 'a', 'b', 'c', 0, 1, 'B', (byte)0xC0, 1, 3, 'd', 'e', 'f', 0 };
	    Name e = Name.fromString("B.abc.");
	    Name e2 = Name.fromString("def.");
	    
	    DNSInput in = new DNSInput(raw);
	    in.jump(6);
	    
	    Name n = new Name(in);
	    assertEquals(e, n);

	    n = new Name(in);
	    assertEquals(e2, n);
	}
    }

    public void test_init_from_name() throws TextParseException
    {
	Name n = new Name("A.B.c.d.");
	Name e = new Name("B.c.d.");
	Name o = new Name(n, 1);
	assertEquals(e, o);
    }

    public void test_init_from_name_root() throws TextParseException
    {
	Name n = new Name("A.B.c.d.");
	Name o = new Name(n, 4);
	assertEquals(Name.root, o);
    }

    public void test_init_from_name_empty() throws TextParseException
    {
	Name n = new Name("A.B.c.d.");
	Name n2 = new Name(n, 5);

	assertFalse(n2.isAbsolute());
	assertFalse(n2.isWild());
	assertEquals(0, n2.labels());
	assertEquals(0, n2.length());
    }

    public void test_concatenate_basic() throws NameTooLongException, TextParseException
    {
	Name p = Name.fromString("A.B");
	Name s = Name.fromString("c.d.");
	Name e = Name.fromString("A.B.c.d.");
	
	Name n = Name.concatenate(p, s);
	assertEquals(e, n);
    }

    public void test_concatenate_abs_prefix() throws NameTooLongException, TextParseException
    {
	Name p = Name.fromString("A.B.");
	Name s = Name.fromString("c.d.");
	Name e = Name.fromString("A.B.");
	
	Name n = Name.concatenate(p, s);
	assertEquals(e, n);
    }

    public void test_concatenate_too_long() throws TextParseException
    {
	Name p = Name.fromString("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
	Name s = Name.fromString("ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc.ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd.");

	try {
	    Name.concatenate(p, s);
	    fail("NameTooLongException not thrown");
	}
	catch(NameTooLongException e ){}
    }

    public void test_relativize() throws TextParseException
    {
	Name sub = Name.fromString("a.b.c.");
	Name dom = Name.fromString("c.");
	Name exp = Name.fromString("a.b");

	Name n = sub.relativize(dom);
	assertEquals(exp, n);
    }

    public void test_relativize_null_origin() throws TextParseException
    {
	Name sub = Name.fromString("a.b.c.");
	Name dom = null;

	Name n = sub.relativize(dom);
	assertEquals(sub, n);
    }

    public void test_relativize_disjoint() throws TextParseException
    {
	Name sub = Name.fromString("a.b.c.");
	Name dom = Name.fromString("e.f.");

	Name n = sub.relativize(dom);
	assertEquals(sub, n);
    }

    public void test_relativize_root() throws TextParseException
    {
	Name sub = Name.fromString("a.b.c.");
	Name dom = Name.fromString(".");
	Name exp = Name.fromString("a.b.c");

	Name n = sub.relativize(dom);
	assertEquals(exp, n);
    }

    public void test_wild() throws TextParseException
    {
	Name sub = Name.fromString("a.b.c.");
	Name exp = Name.fromString("*.b.c.");

	Name n = sub.wild(1);
	assertEquals(exp, n);
    }

    public void test_wild_abs() throws TextParseException
    {
	Name sub = Name.fromString("a.b.c.");
	Name exp = Name.fromString("*.");

	Name n = sub.wild(3);
	assertEquals(exp, n);
    }

    public void test_wild_toobig() throws TextParseException
    {
	Name sub = Name.fromString("a.b.c.");
	try {
	    sub.wild(4);
	    fail("IllegalArgumentException not thrown");
	}
	catch(IllegalArgumentException e){}
    }

    public void test_wild_toosmall() throws TextParseException
    {
	Name sub = Name.fromString("a.b.c.");
	try {
	    sub.wild(0);
	    fail("IllegalArgumentException not thrown");
	}
	catch(IllegalArgumentException e){}
    }

    public void test_fromDNAME() throws NameTooLongException, TextParseException
    {
	Name own = new Name("the.owner.");
	Name alias = new Name("the.alias.");
	DNAMERecord dnr = new DNAMERecord(own, DClass.IN, 0xABCD, alias);
	Name sub = new Name("sub.the.owner.");
	Name exp = new Name("sub.the.alias.");

	Name n = sub.fromDNAME(dnr);