Fix YXmlElement.clone and YXmlFragment.clone

src/types/YXmlElement.js

@@ -81,7 +81,7 @@ export class YXmlElement extends YXmlFragment {
       el.setAttribute(key, attrs[key])
     }
     // @ts-ignore
-    el.insert(0, el.toArray().map(item => item instanceof AbstractType ? item.clone() : item))
+    el.insert(0, this.toArray().map(item => item instanceof AbstractType ? item.clone() : item))
     return el
   }
 

src/types/YXmlFragment.js

@@ -167,7 +167,7 @@ export class YXmlFragment extends AbstractType {
   clone () {
     const el = new YXmlFragment()
     // @ts-ignore
-    el.insert(0, el.toArray().map(item => item instanceof AbstractType ? item.clone() : item))
+    el.insert(0, this.toArray().map(item => item instanceof AbstractType ? item.clone() : item))
     return el
   }
 

tests/y-xml.tests.js

@@ -133,3 +133,21 @@ export const testInsertafter = tc => {
     el.insertAfter(deepsecond1, [new Y.XmlText()])
   })
 }
+
+
+/**
+ * @param {t.TestCase} tc
+ */
+ export const testClone = tc => {
+  const ydoc = new Y.Doc()
+  const yxml = ydoc.getXmlFragment()
+  const first = new Y.XmlText('text')
+  const second = new Y.XmlElement('p')
+  const third = new Y.XmlElement('p')
+  yxml.push([first, second, third])
+  t.compareArrays(yxml.toArray(), [first, second, third])
+
+  const cloneYxml = yxml.clone()
+  t.assert(cloneYxml.length === 3)
+  t.assert(cloneYxml.toJSON() === yxml.toJSON())
+}