Add simplistic rendering test

src/QrCode.test.tsx

@@ -0,0 +1,34 @@
+/*
+Copyright 2024 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { describe, expect, test } from "vitest";
+import { render, configure } from "@testing-library/react";
+
+import { QrCode } from "./QrCode";
+
+configure({
+  defaultHidden: true,
+});
+
+describe("QrCode", () => {
+  test("renders", async () => {
+    const { container, findByRole } = render(
+      <QrCode data="foo" className="bar" />,
+    );
+    await findByRole("img") as HTMLImageElement;
+    expect(container.firstChild).toMatchSnapshot();
+  });
+});

src/__snapshots__/QrCode.test.tsx.snap

@@ -0,0 +1,12 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`QrCode > renders 1`] = `
+<div
+  class="qrCode bar"
+>
+  <img
+    alt="qr_code"
+    src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAHQAAAB0CAYAAABUmhYnAAAAAklEQVR4AewaftIAAALBSURBVO3BQW7kQAwEwSxC//9yro88NSBI4/UQjIg/WGMUa5RijVKsUYo1SrFGKdYoxRqlWKMUa5RijVKsUYo1SrFGKdYoxRrl4qEk/CaVkyR0Kl0STlS6JPwmlSeKNUqxRinWKBcvU3lTEk6S8ITKHSpvSsKbijVKsUYp1igXH5aEO1Q+SaVLQqdyRxLuUPmkYo1SrFGKNcrFl1PpknCShE5lkmKNUqxRijXKxZdLQqdyotIloVP5ZsUapVijFGuUiw9T+UuS8CaVv6RYoxRrlGKNcvGyJPwlSehUuiTckYS/rFijFGuUYo0Sf/DFkvAmlW9WrFGKNUqxRrl4KAknKl0SOpWTJJyodEk4UbkjCXeodEk4UXlTsUYp1ijFGuXiIZUuCXck4USlS0KXhE7lk1TelIRO5YlijVKsUYo1ysXLVLok3KHSJaFT6ZLQJaFTOUnCicodSehUTpLwpmKNUqxRijXKxUNJ6FSeSEKn0iXhROUkCZ3Kb0pCp/KmYo1SrFGKNcrFh6mcJKFT6ZJwotIloVPpVLokdCpdEjqVLgmdyh1J6FSeKNYoxRqlWKPEH3yxJHQqJ0noVO5IwolKl4ROpUtCp/JEsUYp1ijFGuXioST8JpU7ktCpnCShUzlROVHpktCpvKlYoxRrlGKNcvEylTcl4USlS8JJEt6UhBOVTqVLQqfyRLFGKdYoxRrl4sOScIfKEyonSehUTpJwh0qXhN9UrFGKNUqxRrn4ckn4JJU7kvA/FWuUYo1SrFEuvpxKl4QTlS4JncodSehU7kjCm4o1SrFGKdYoFx+m8klJOFE5UemScKJyRxI6lU7lTcUapVijFGuUi5cl4X9SOUnCicoTSThJQqfypmKNUqxRijVK/MEao1ijFGuUYo1SrFGKNUqxRinWKMUapVijFGuUYo1SrFGKNUqxRinWKP8AKoQP/lIBoMIAAAAASUVORK5CYII="
+  />
+</div>
+`;