final ArrayIterator<Integer> itr = new ArrayIterator<Integer>(new Integer[] { 1, 2 });
        itr.next();
        itr.next();
        itr.next();
    }

    /**
     *
     */
    @Test
    public void testHasNext() {
        final ArrayIterator<String> itr = new ArrayIterator<String>("A", "B");
        assertThat(itr.hasNext(), is(true));
        itr.next();
        assertThat(itr.hasNext(), is(true));

        final Vector<String> vector = new Vector<String>();
        vector.add("a");
        final EnumerationIterator<String> itr = new EnumerationIterator<String>(vector.elements());
        assertThat(itr.hasNext(), is(true));
        assertThat(itr.next(), is("a"));
        assertThat(itr.hasNext(), is(not(true)));
    }

    /**
     * @throws Exception
     */
    @Test

        assertArgumentNotNull("children", children);
        assertArgumentNotNull("buf", buf);

        final int length = children.getLength();
        for (int i = 0; i < length; ++i) {
            appendNode(children.item(i), buf);
        }
    }

    /**
     * {@link NamedNodeMap}の文字列表現を追加します。
     *
     * @param attrs
     *            属性。{@literal null}であってはいけません
     * @param buf