Type initialization using objects

cypress/fixtures/SimpleEntity.js

@@ -0,0 +1,19 @@
+import IEntity from "../../js/entity/IEntity"
+
+export default class SimpleEntity extends IEntity {
+
+    static attributes = {
+        someNumber: 567,
+        someString: "alpha",
+        someString2: "beta",
+        someBoolean: true,
+        someBoolean2: false,
+        someObjectString: new String("gamma"),
+        someArray: [400, 500, 600, 700, 800],
+        someSet: new Set([10, 20, 30, 40, 50, 60, 70]),
+    }
+
+    static {
+        this.cleanupAttributes(this.attributes)
+    }
+}