Added support for inserting several nodes from an array

package.json

@@ -1,6 +1,6 @@
 {
   "name": "njs-tfso-xml",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "main": "./index.js",
   "scripts": {
     "test": "mocha --recursive ./test/**/test*"

src/XmlWriter.js

@@ -76,6 +76,33 @@ class XmlWriter{
         return this
     }
 
+    /**
+     * Ex:
+     *      // simple element creation
+     *      writer.adds('node', ['a','b'])
+     *      <node>a<node>
+     *      <node>b<node>
+     *      // or a custom element creation
+     *      writer.adds('node', ['a','b'], (node, str) => node
+     *            .add('Id', str)
+     *      )
+     *      <node><Id>a</Id><node>
+     *      <node><Id>b</Id><node>
+     * @param {string} path
+     * @param {Array} values
+     * @param {elementCallback|*} valueOrFunctionOrNull
+     * @param {Object|null} attributes
+     * @returns {XmlWriter}
+     */
+    adds(path, values, valueOrFunctionOrNull = null, attributes = null){
+        valueOrFunctionOrNull = valueOrFunctionOrNull || ((writer, value) => writer.setVal(value))
+        values.forEach(value =>{
+            this.addAndGet(path, (writer) => valueOrFunctionOrNull(writer, value), attributes)
+        })
+
+        return this
+    }
+
     /**
      * @param {string} path
      * @param {elementCallback|*} valueOrFunctionOrNull

test/testXmlWriter.js

@@ -47,4 +47,21 @@ describe('XmlWriter', () => {
 
         chai.expect(reader.valAt('test')).to.equal('hello!')
     })
+
+    it('should inject several simple values', async () => {
+        const writer = XmlWriter.create('', '', '', 'Document')
+
+        writer.adds('node', ['a', 'b'])
+
+        chai.expect(writer.toString()).to.deep.equal('<?xml version="1.0" encoding="utf-8"?><Document><node>a</node><node>b</node></Document>')
+    })
+
+    it('should inject several custom values with attributes', async () => {
+        const writer = XmlWriter.create('', '', '', 'Document')
+
+        const items = ['a', 'b']
+        writer.adds('node', items, (node, item)=> node.add('id', item), {prop:'yo'})
+
+        chai.expect(writer.toString()).to.deep.equal('<?xml version="1.0" encoding="utf-8"?><Document><node prop="yo"><id>a</id></node><node prop="yo"><id>b</id></node></Document>')
+    })
 })