Migrate more jest tests to vitest (#33898)

* Migrate more jest tests to vitest

* Fix jest config

* Fix jest config

* Make remaining jest tests type-happy

apps/web/test/setup/adapter.ts

@@ -0,0 +1,25 @@
+/*
+Copyright 2026 Element Creations Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE files in the repository root for full details.
+*/
+
+import { vi } from "vitest";
+import { mocked as jestMocked } from "jest-mock";
+
+const isJest = typeof jest !== "undefined";
+
+/**
+ * Subset of the vitest API surface, with jest equivalents for the same functions when running under jest.
+ */
+const adapter = {
+    fn: isJest ? (jest.fn as unknown as typeof vi.fn) : vi.fn,
+    spyOn: isJest ? (jest.spyOn as unknown as typeof vi.spyOn) : vi.spyOn,
+    mocked: isJest ? (jestMocked as typeof vi.mocked) : vi.mocked,
+} as Pick<typeof vi, "fn" | "spyOn" | "mocked">;
+
+const mocked = adapter.mocked;
+export { adapter as vi, mocked };
+
+export { type Mocked, type MockedObject } from "vitest";

apps/web/test/setup/mocks.ts

@@ -6,23 +6,25 @@ SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Com
 Please see LICENSE files in the repository root for full details.
 */
 
+import { vi } from "./adapter.ts";
+
 export const mocks = {
     AudioBufferSourceNode: {
-        connect: jest.fn(),
-        start: jest.fn(),
-        stop: jest.fn(),
+        connect: vi.fn(),
+        start: vi.fn(),
+        stop: vi.fn(),
     } as unknown as AudioBufferSourceNode,
     AudioContext: {
-        close: jest.fn(),
-        createMediaElementSource: jest.fn(),
-        createMediaStreamDestination: jest.fn(),
-        createMediaStreamSource: jest.fn(),
-        createStreamTrackSource: jest.fn(),
-        createBufferSource: jest.fn((): AudioBufferSourceNode => ({ ...mocks.AudioBufferSourceNode })),
-        getOutputTimestamp: jest.fn(),
-        resume: jest.fn(),
-        setSinkId: jest.fn(),
-        suspend: jest.fn(),
-        decodeAudioData: jest.fn(),
+        close: vi.fn(),
+        createMediaElementSource: vi.fn(),
+        createMediaStreamDestination: vi.fn(),
+        createMediaStreamSource: vi.fn(),
+        createStreamTrackSource: vi.fn(),
+        createBufferSource: vi.fn((): AudioBufferSourceNode => ({ ...mocks.AudioBufferSourceNode })),
+        getOutputTimestamp: vi.fn(),
+        resume: vi.fn(),
+        setSinkId: vi.fn(),
+        suspend: vi.fn(),
+        decodeAudioData: vi.fn(),
     } as unknown as AudioContext,
 };