Use browser default time and number formatting with polyfills if needed (#9481)

Co-authored-by: Paulus Schoutsen <balloob@gmail.com>

test/common/entity/get_view_entities.spec.ts

@@ -0,0 +1,49 @@
+import { assert } from "chai";
+
+import { getViewEntities } from "../../../src/common/entity/get_view_entities";
+
+import {
+  createEntities,
+  createGroup,
+  createView,
+  entityMap,
+} from "./test_util";
+
+describe("getViewEntities", () => {
+  it("should work", () => {
+    const entities = createEntities(10);
+    const entityIds = Object.keys(entities);
+
+    const group1 = createGroup({
+      attributes: { entity_id: entityIds.splice(0, 2) },
+    });
+    entities[group1.entity_id] = group1;
+
+    const group2 = createGroup({
+      attributes: { entity_id: entityIds.splice(0, 3) },
+    });
+    entities[group2.entity_id] = group2;
+
+    const view = createView({
+      attributes: {
+        entity_id: [group1.entity_id, group2.entity_id].concat(
+          entityIds.splice(0, 2)
+        ),
+      },
+    });
+
+    const expectedEntities = entityMap(
+      view.attributes.entity_id.map((ent) => entities[ent])
+    );
+    Object.assign(
+      expectedEntities,
+      entityMap(group1.attributes.entity_id.map((ent) => entities[ent]))
+    );
+    Object.assign(
+      expectedEntities,
+      entityMap(group2.attributes.entity_id.map((ent) => entities[ent]))
+    );
+
+    assert.deepEqual(expectedEntities, getViewEntities(entities, view));
+  });
+});