when:
        lexer.pushText("<P></End>")
        lexer.visit(visitor)

        then:
        1 * visitor.onStartHtmlElement('p')
        1 * visitor.onStartHtmlElementComplete('p')
        1 * visitor.onEndHtmlElement('end')
        1 * visitor.onEnd()
        0 * visitor._
    }

    def parsesHtmlEntities() {
        when:
        lexer.pushText("before &amp; after")
        lexer.visit(visitor)

 * </ul>
 */
class JavadocScanner {
    private final StringBuilder input = new StringBuilder();
    private int pos;
    private int markPos;

    JavadocScanner(String rawCommentText) {
        pushText(rawCommentText);
    }

    @Override
    public String toString() {
        return input.substring(pos);
    }

    public boolean isEmpty() {
        return pos == input.length();
    }

    }

    private final JavadocScanner scanner;

    BasicJavadocLexer(JavadocScanner scanner) {
        this.scanner = scanner;
    }

    public void pushText(String rawCommentText) {
        scanner.pushText(rawCommentText);
    }

    @Override
    public void visit(TokenVisitor visitor) {
        while (!scanner.isEmpty()) {
            if (scanner.lookingAt(START_HTML_COMMENT)) {