expose methods -- getParent(),getSiblings(),getChildren()

README.md

@@ -685,6 +685,63 @@ This method returns you the nodes related to the specified node.
   </tr>
 </table>
 
+#### getParent($node)
+This method returns you the parent node of the specified node.
+<table>
+  <tr>
+    <th>Name</th>
+    <th>Type</th>
+    <th>Required</th>
+    <th>Default</th>
+    <th>Description</th>
+  </tr>
+  <tr>
+    <td>$node</td>
+    <td>JQuery Object</td>
+    <td>Yes</td>
+    <td></td>
+    <td>It's the desired JQuery Object to know its parent node</td>
+  </tr>
+</table>
+
+#### getSiblings($node)
+This method returns you the sibling nodes of the specified node.
+<table>
+  <tr>
+    <th>Name</th>
+    <th>Type</th>
+    <th>Required</th>
+    <th>Default</th>
+    <th>Description</th>
+  </tr>
+  <tr>
+    <td>$node</td>
+    <td>JQuery Object</td>
+    <td>Yes</td>
+    <td></td>
+    <td>It's the desired JQuery Object to know its sibling nodes</td>
+  </tr>
+</table>
+
+#### getChildren($node)
+This method returns you the child nodes of the specified node.
+<table>
+  <tr>
+    <th>Name</th>
+    <th>Type</th>
+    <th>Required</th>
+    <th>Default</th>
+    <th>Description</th>
+  </tr>
+  <tr>
+    <td>$node</td>
+    <td>JQuery Object</td>
+    <td>Yes</td>
+    <td></td>
+    <td>It's the desired JQuery Object to know its child nodes</td>
+  </tr>
+</table>
+
 #### setChartScale($chart, newScale)
 This method helps you set the specified chart with new scale.
 <table>

package.json

@@ -1,13 +1,14 @@
 {
   "name": "orgchart",
-  "version": "3.1.1",
+  "version": "3.1.2",
   "description": "Simple and direct organization chart(tree-like hierarchy) plugin based on pure DOM and jQuery.",
   "main": "./dist/js/jquery.orgchart.min.js",
   "style": [
     "./dist/css/jquery.orgchart.min.css"
   ],
   "scripts": {
     "test": "gulp test",
+    "unit-tests": "gulp unit-tests",
     "build": "gulp build",
     "start": "gulp serve"
   },

test/unit/tests.js

@@ -184,7 +184,8 @@ describe('orgchart -- unit tests', function () {
 
   it('getRelatedNodes()', function () {
     oc.getRelatedNodes().should.deep.equal($());
-    oc.getRelatedNodes($('td:first'), 'children').should.deep.equal($());
+    oc.getRelatedNodes({}, 'children').should.deep.equal($());
+    oc.getRelatedNodes($('.hierarchy:first'), 'children').should.deep.equal($());
     oc.getRelatedNodes($('.node:first'), 'child').should.deep.equal($());
 
     oc.getRelatedNodes($laolao, 'parent').should.deep.equal($());
@@ -196,6 +197,37 @@ describe('orgchart -- unit tests', function () {
     oc.getRelatedNodes($bomiao, 'siblings').toArray().should.members([$sumiao[0], $hongmiao[0]]);
   });
 
+  it('getParent()', function () {
+    oc.getParent().should.deep.equal($());
+    oc.getParent({}).should.deep.equal($());
+    oc.getParent($('.hierarchy:first')).should.deep.equal($());
+
+    oc.getParent($laolao).should.deep.equal($());
+    oc.getParent($bomiao).should.deep.equal($laolao);
+    oc.getParent($sandan).should.deep.equal($pangpang);
+  });
+
+  it('getSiblings()', function () {
+    oc.getSiblings().should.deep.equal($());
+    oc.getSiblings({}).should.deep.equal($());
+    oc.getSiblings($('.hierarchy:first')).should.deep.equal($());
+
+    oc.getSiblings($laolao).should.deep.equal($());
+    oc.getSiblings($bomiao).toArray().should.members([$sumiao[0], $hongmiao[0]]);
+    oc.getSiblings($sandan).should.deep.equal($());
+  });
+
+  it('getChildren()', function () {
+    oc.getChildren().should.deep.equal($());
+    oc.getChildren({}).should.deep.equal($());
+    oc.getChildren($('.hierarchy:first')).should.deep.equal($());
+
+    oc.getChildren($laolao).toArray().should.members([$bomiao[0], $sumiao[0], $hongmiao[0]]);
+    oc.getChildren($bomiao).should.deep.equal($());
+    oc.getChildren($sumiao).toArray().should.members([$tiehua[0], $heihei[0], $pangpang[0]]);
+    oc.getChildren($sandan).should.deep.equal($());
+  });
+
   it('hideParent()', function () {
     var spy  = sinon.spy(oc, 'hideParent');
     var spy2  = sinon.spy(oc, 'hideSiblings');