fix(parser): don't eat not allowed tags with params (#58) fixes #54

* feat(parser): write test for only allowed tags parsing

* chore(parser): rename only allowed test

* fix(parser): only allowed tag rendering

* fix(plugin-helper): add new TagNode toString tests

packages/bbob-plugin-helper/src/TagNode.js

@@ -1,9 +1,28 @@
 import { OPEN_BRAKET, CLOSE_BRAKET, SLASH } from './char';
-import { getNodeLength, appendToNode } from './index';
+import {
+  getNodeLength, appendToNode, attrsToString, attrValue, getUniqAttr,
+} from './index';
+
+const getTagAttrs = (tag, params) => {
+  const uniqAattr = getUniqAttr(params);
+
+  if (uniqAattr) {
+    const tagAttr = attrValue(tag, uniqAattr);
+    const attrs = { ...params };
+
+    delete attrs[uniqAattr];
+
+    const attrsStr = attrsToString(attrs);
+
+    return `${tagAttr}${attrsStr}`;
+  }
+
+  return `${tag}${attrsToString(params)}`;
+};
 
 class TagNode {
   constructor(tag, attrs, content) {
-    this.tag = tag.toLowerCase();
+    this.tag = tag;
     this.attrs = attrs;
     this.content = [].concat(content);
   }
@@ -24,11 +43,22 @@ class TagNode {
     return getNodeLength(this);
   }
 
+  toTagNode() {
+    return new TagNode(this.tag.toLowerCase(), this.attrs, this.content);
+  }
+
   toString() {
     const OB = OPEN_BRAKET;
     const CB = CLOSE_BRAKET;
+    const isEmpty = this.content.length === 0;
+    const content = this.content.reduce((r, node) => r + node.toString(), '');
+    const tagAttrs = getTagAttrs(this.tag, this.attrs);
 
-    return OB + this.tag + CB + this.content.reduce((r, node) => r + node.toString(), '') + OB + SLASH + this.tag + CB;
+    if (isEmpty) {
+      return `${OB}${tagAttrs}${CB}`;
+    }
+
+    return `${OB}${tagAttrs}${CB}${content}${OB}${SLASH}${this.tag}${CB}`;
   }
 }