diff --git a/gui/ngXosViews/serviceTopology/spec/sample.test.js b/gui/ngXosViews/serviceTopology/spec/sample.test.js
index 8b490e7..b30543a 100644
--- a/gui/ngXosViews/serviceTopology/spec/sample.test.js
+++ b/gui/ngXosViews/serviceTopology/spec/sample.test.js
@@ -117,8 +117,31 @@
 
       expect(tree.children[0].children[0].name).toBe('service-2');
       expect(tree.children[0].children[0].children[0].name).toBe('service-3');
+      expect(tree.children[0].children[0].children[0].children[0].name).toBe('Internet');
 
       expect(tree.children[0].children[1].name).toBe('service-4');
+      expect(tree.children[0].children[1].children[0].name).toBe('Internet');
+    });
+  });
+
+  describe('given an object', () => {
+
+    const sample = {
+      name: '1',
+      children: [
+        {
+          name: '2',
+          children: [
+            {
+              name: '3'
+            }
+          ]
+        }
+      ]
+    };
+
+    it('should return the depth', () => {
+      expect(Service.depthOf(sample)).toBe(3);
     });
   });