Create Grid component + Test. Index test adaptations

test/Grid.spec.js

@@ -0,0 +1,23 @@
+import { mount } from "@vue/test-utils";
+import Grid from "@/components/Grid";
+import mockFilms from "./fake-films.json";
+
+describe("Grid", () => {
+  it("tests props", () => {
+    expect(Grid.props).toMatchObject({
+      dataSource: {
+        type: Array,
+        required: true
+      }
+    });
+  });
+
+  it("should render Grid instance", () => {
+    const wrapper = mount(Grid, {
+      propsData: {
+        dataSource: mockFilms
+      }
+    });
+    expect(JSON.parse(wrapper.text())).toEqual(mockFilms);
+  });
+});