String tag = "tag", id = "id", css = "css", attrName = "attrName", attrValue = "attrValue";
        PrunedTag prunedtag = new PrunedTag(tag);
        prunedtag.setAttr(attrName, attrValue);
        prunedtag.setId(id);
        prunedtag.setCss(css);
        assertEquals("PrunedTag [tag=" + tag + ", id=" + id + ", css=" + css + ", attrName=" + attrName + ", attrValue=" + attrValue + "]",
                prunedtag.toString());
    }

    @Test

     * @param url the base URL for resolving relative URLs
     * @param attrValue the attribute value containing the URL
     * @param encoding the character encoding
     */
    @Override
    protected void addChildUrlFromTagAttribute(final List<String> urlList, final URL url, final String attrValue, final String encoding) {
        final String urlValue = attrValue.trim();
        String u = null;
        try {

){Rt(de.beforeSanitizeAttributes,e,null);const{attributes:t}=e;if(!t||Nt(e))return;const n={attrName:"",attrValue:"",keepAttr:!0,allowedAttributes:Re,forceKeepAttr:void 0};let r=t.length;for(;r--;){const i=t[r],{name:a,namespaceURI:l,value:c}=i,s=ft(a),m=c;let f="value"===a?m:A(m);if(n.attrName=s,n.attrValue=f,n.keepAttr=!0,n.forceKeepAttr=void 0,Rt(de.uponSanitizeAttribute,e,n),f=n.attrValue,!je||"id"!==s&&"name"!==s||(_t(a,e),f="user-content-"+f),ze&&b(/((--!?|])>)|<\/(style|script|title|xmp|t...

*   New `Variable`s are not added to the same collection several times even if a
    list with duplicates is passed to the constructor.
*   The Python API will now properly set the `list` member of `AttrValue` in
    constructed `GraphDef` messages for empty lists. The serialization of some
    graphs will change, but the change is both forwards and backwards

            attributes: list[HTMLLinkAttribute] = []
            for attr_name, attr_quote, attr_value in re.findall(
                HTML_ATTR_RE, link_open_tag
            ):
                assert isinstance(attr_name, str)
                assert isinstance(attr_quote, str)
                assert isinstance(attr_value, str)
                attributes.append(
                    HTMLLinkAttribute(