Improve flaky test by waiting for dom content

Author: s1hofmann

test/window-integration-tests/test.js

@@ -1,4 +1,4 @@
-const { _electron: electron } = require('playwright');
+const {_electron: electron} = require('playwright');
 const libnut = require("../..");
 const {POS_X, POS_Y, WIDTH, HEIGTH, TITLE} = require("./constants");
 
@@ -16,6 +16,7 @@ beforeEach(async () => {
     app = await electron.launch({args: ['main.js']});
     page = await app.firstWindow({timeout: APP_TIMEOUT});
     windowHandle = await app.browserWindow(page);
+    await page.waitForLoadState("domcontentloaded");
     await windowHandle.evaluate((win) => {
         win.minimize();
         win.restore();