test(electron): theme check (#2182)

tests/kit/playwright.ts

@@ -1,10 +1,18 @@
+import { ok } from 'node:assert';
 import crypto from 'node:crypto';
 import fs from 'node:fs';
-import path from 'node:path';
+import path, { resolve } from 'node:path';
 import process from 'node:process';
 
 import { test as baseTest } from '@playwright/test';
 
+export const rootDir = resolve(__dirname, '..', '..');
+// assert that the rootDir is the root of the project
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+ok(require(resolve(rootDir, 'package.json')).name.toLowerCase() === 'affine');
+
+export const testResultDir = resolve(rootDir, 'test-results');
+
 const istanbulTempDir = process.env.ISTANBUL_TEMP_DIR
   ? path.resolve(process.env.ISTANBUL_TEMP_DIR)
   : path.join(process.cwd(), '.nyc_output');