chore(test): add initial test for indexed db

Signed-off-by: Max <max@nextcloud.com>

Author: max-nextcloud

playwright/e2e/indexed-db.spec.ts

@@ -0,0 +1,56 @@
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import { expect, mergeTests } from '@playwright/test'
+import { test as editorTest } from '../support/fixtures/editor'
+import { test as offlineTest } from '../support/fixtures/offline'
+import { test as randomUserTest } from '../support/fixtures/random-user'
+import { test as uploadFileTest } from '../support/fixtures/upload-file'
+
+const test = mergeTests(editorTest, offlineTest, randomUserTest, uploadFileTest)
+
+// As we switch on and off the network
+// we cannot run tests in parallel.
+test.describe.configure({ mode: 'serial' });
+
+test.beforeEach(async ({ file }) => {
+	await file.open()
+})
+
+test('recovering from indexed db', async ({
+	editor,
+	file,
+	setOffline,
+	setOnline,
+}) => {
+	await expect(editor.locator).toBeVisible()
+	await setOffline()
+	await editor.typeHeading('Hello world')
+	await file.close()
+	await setOnline()
+	await file.open()
+	await expect(editor.getHeading('Hello world')).toBeVisible()
+	await expect(editor.offlineState).not.toBeVisible()
+	await expect(editor.saveIndicator).toHaveAttribute('title', /Unsaved changes/)
+})
+
+test('conflict when recovering from indexed db', async ({
+	editor,
+	file,
+	setOffline,
+	setOnline,
+}) => {
+	await expect(editor.locator).toBeVisible()
+	await setOffline()
+	await editor.typeHeading('Hello world')
+	await file.close()
+	await setOnline()
+	await file.upload('Good bye')
+	await file.open()
+	await expect(editor.getHeading('Hello world')).toBeVisible()
+	await expect(editor.offlineState).not.toBeVisible()
+	await expect(editor.saveIndicator).toHaveAttribute('title', /Unsaved changes/)
+})
+