Prepare for repo merge

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

test/unit-tests/components/views/elements/SyntaxHighlight-test.tsx

@@ -0,0 +1,30 @@
+/* eslint @typescript-eslint/no-unused-vars: ["error", { "varsIgnorePattern": "^_" }] */
+// Copyright 2024 New Vector Ltd.
+// Copyright 2023 The Matrix.org Foundation C.I.C.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
+// Please see LICENSE files in the repository root for full details.
+
+import { render, waitFor } from "jest-matrix-react";
+import hljs, { type HighlightOptions } from "highlight.js";
+import React from "react";
+
+import SyntaxHighlight from "../../../../src/components/views/elements/SyntaxHighlight";
+
+describe("<SyntaxHighlight />", () => {
+    it("renders", async () => {
+        const { container } = render(<SyntaxHighlight>console.log("Hello, World!");</SyntaxHighlight>);
+        await waitFor(() => expect(container.querySelector(".language-arcade")).toBeTruthy());
+        expect(container).toMatchSnapshot();
+    });
+
+    it.each(["json", "javascript", "css"])("uses the provided language", async (lang) => {
+        const mock = jest.spyOn(hljs, "highlight");
+
+        const { container } = render(<SyntaxHighlight language={lang}>// Hello, World</SyntaxHighlight>);
+        await waitFor(() => expect(container.querySelector(`.language-${lang}`)).toBeTruthy());
+
+        const [_lang, opts] = mock.mock.lastCall!;
+        expect((opts as unknown as HighlightOptions)["language"]).toBe(lang);
+    });
+});