Chore: Desktop: Set up integration testing with Playwright (#9043)

packages/app-desktop/integration-tests/util/test.ts

@@ -0,0 +1,45 @@
+import { resolve, join, dirname } from 'path';
+import { remove, mkdirp } from 'fs-extra';
+import { _electron as electron, Page, ElectronApplication, test as base } from '@playwright/test';
+import uuid from '@joplin/lib/uuid';
+
+
+
+type JoplinFixtures = {
+	electronApp: ElectronApplication;
+	mainWindow: Page;
+};
+
+// A custom fixture that loads an electron app. See
+// https://playwright.dev/docs/test-fixtures
+
+export const test = base.extend<JoplinFixtures>({
+	// Playwright fails if we don't use the object destructuring
+	// pattern in the first argument.
+	//
+	// See https://github.com/microsoft/playwright/issues/8798
+	//
+	// eslint-disable-next-line no-empty-pattern
+	electronApp: async ({ }, use) => {
+		const profilePath = resolve(join(dirname(__dirname), 'test-profile'));
+		const profileSubdir = join(profilePath, uuid.createNano());
+		await mkdirp(profileSubdir);
+
+		const startupArgs = ['main.js', '--env', 'dev', '--profile', profileSubdir];
+		const electronApp = await electron.launch({ args: startupArgs });
+
+		await use(electronApp);
+
+		await electronApp.firstWindow();
+		await electronApp.close();
+		await remove(profileSubdir);
+	},
+
+	mainWindow: async ({ electronApp }, use) => {
+		const window = await electronApp.firstWindow();
+		await use(window);
+	},
+});
+
+
+export { expect } from '@playwright/test';