Add deleteProperty to TrackedObject

addon/-private/object.js

@@ -50,6 +50,17 @@ const proxyHandler = {
     return true;
   },
 
+  deleteProperty(target, prop, receiver) {
+    if (!(prop in target)) { return; }
+
+    delete target[prop];
+
+    dirtyKey(target, COLLECTION);
+
+    // We need to notify this way to make {{each-in}} update
+    notifyPropertyChange(receiver, '_SOME_PROP_');
+  },
+
   getPrototypeOf() {
     return TrackedObject.prototype;
   },

tests/unit/object-test.js

@@ -148,4 +148,34 @@ module('TrackedObject', function (hooks) {
       }
     }
   );
+
+  reactivityTest(
+    'Object.deleteProperty works',
+    class extends Component {
+      obj = new TrackedObject();
+
+      get value() {
+        return this.obj.foo;
+      }
+
+      update() {
+        Object.deleteProperty(this.obj, 'foo');
+      }
+    }
+  );
+
+  reactivityTest(
+    'delete works',
+    class extends Component {
+      obj = new TrackedObject();
+
+      get value() {
+        return this.obj.foo;
+      }
+
+      update() {
+        delete this.obj.foo;
+      }
+    }
+  );
 });