Add test coverage (#23341)

test/unit-tests/async-components/structures/ErrorView-test.tsx

@@ -0,0 +1,27 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+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 * as React from "react";
+import { render } from "@testing-library/react";
+
+import ErrorView from "../../../../src/async-components/structures/ErrorView";
+
+describe("<ErrorView />", () => {
+    it("should match snapshot", () => {
+        const { asFragment } = render(<ErrorView title="TITLE" messages={["MSG1", "MSG2"]} />);
+        expect(asFragment()).toMatchSnapshot();
+    });
+});