test(json-crdt): 💍 add test for object deep equality identity

Author: streamich

src/json-crdt/model/__tests__/Model.view.spec.ts

@@ -0,0 +1,19 @@
+import {Model} from '../Model';
+
+test('"obj" node returns same object if deep equality does not change', () => {
+  const model = Model.withLogicalClock();
+  model.api.root({
+    foo: 'bar',
+    qux: [1, 2, 3],
+  });
+  const view1 = model.view();
+  const time1 = model.clock.time;
+  model.api.obj([]).set({
+    foo: 'bar',
+  });
+  model.api.val(['qux', 1]).set(2);
+  const view2 = model.view();
+  const time2 = model.clock.time;
+  expect(view1).toBe(view2);
+  expect(time2 > time1).toBe(true);
+});