1 files changed, 66 insertions, 0 deletions
diff --git a/src/pybind/mgr/dashboard/frontend/src/app/shared/classes/cd-helper.class.spec.ts b/src/pybind/mgr/dashboard/frontend/src/app/shared/classes/cd-helper.class.spec.ts
new file mode 100644
index 000000000..a5a28650d
--- /dev/null
+++ b/src/pybind/mgr/dashboard/frontend/src/app/shared/classes/cd-helper.class.spec.ts
@@ -0,0 +1,66 @@
+import { CdHelperClass } from './cd-helper.class';
+
+class MockClass {
+  n = 42;
+  o = {
+    x: 'something',
+    y: [1, 2, 3],
+    z: true
+  };
+  b: boolean;
+}
+
+describe('CdHelperClass', () => {
+  describe('updateChanged', () => {
+    let old: MockClass;
+    let used: MockClass;
+    let structure = {
+      n: 42,
+      o: {
+        x: 'something',
+        y: [1, 2, 3],
+        z: true
+      }
+    } as any;
+
+    beforeEach(() => {
+      old = new MockClass();
+      used = new MockClass();
+      structure = {
+        n: 42,
+        o: {
+          x: 'something',
+          y: [1, 2, 3],
+          z: true
+        }
+      };
+    });
+
+    it('should not update anything', () => {
+      CdHelperClass.updateChanged(used, structure);
+      expect(used).toEqual(old);
+    });
+
+    it('should only change n', () => {
+      CdHelperClass.updateChanged(used, { n: 17 });
+      expect(used.n).not.toEqual(old.n);
+      expect(used.n).toBe(17);
+    });
+
+    it('should update o on change of o.y', () => {
+      CdHelperClass.updateChanged(used, structure);
+      structure.o.y.push(4);
+      expect(used.o.y).toEqual(old.o.y);
+      CdHelperClass.updateChanged(used, structure);
+      expect(used.o.y).toEqual([1, 2, 3, 4]);
+    });
+
+    it('should change b, o and n', () => {
+      structure.o.x.toUpperCase();
+      structure.n++;
+      structure.b = true;
+      CdHelperClass.updateChanged(used, structure);
+      expect(used).toEqual(structure);
+    });
+  });
+});