more-robust-ui-tests (#1157)

Co-authored-by: Philipp Hofer <philipp.hofer@mag.linz.at>
Reviewed-on: #1157
Co-authored-by: Philipp Hofer <philipp@hofer.link>
Co-committed-by: Philipp Hofer <philipp@hofer.link>

frontend/tests/helpers.ts

@@ -0,0 +1,29 @@
+import { exec } from 'child_process';
+import { promisify } from 'util';
+import { Page } from '@playwright/test';
+
+const execAsync = promisify(exec);
+
+export async function resetDatabase(): Promise<void> {
+  await execAsync('cd .. && ./reset_test_data.sh');
+}
+
+export async function login(page: Page, username: string, password: string): Promise<void> {
+  // Clear cookies to ensure clean state
+  await page.context().clearCookies();
+
+  // Navigate to auth page and wait for it to fully load
+  await page.goto("/auth", { waitUntil: 'load' });
+  await page.waitForLoadState('networkidle');
+
+  await page.getByPlaceholder("Name").click();
+  await page.getByPlaceholder("Name").fill(username);
+  await page.getByPlaceholder("Passwort").click();
+  await page.getByPlaceholder("Passwort").fill(password);
+
+  // Wait for navigation after form submission
+  await Promise.all([
+    page.waitForURL(/\/(planned|log|$)/, { timeout: 10000 }),
+    page.getByPlaceholder("Passwort").press("Enter")
+  ]);
+}