test: Add playwright main usage test

e2e/helpers/seed-test-endpoint.ts

@@ -0,0 +1,77 @@
+import { type BrowserContext, type Page } from '@playwright/test';
+
+const SERVER_ENDPOINTS_STORAGE_KEY = 'metoyou_server_endpoints';
+const REMOVED_DEFAULT_KEYS_STORAGE_KEY = 'metoyou_removed_default_server_keys';
+
+type SeededEndpointStorageState = {
+  key: string;
+  removedKey: string;
+  endpoints: {
+    id: string;
+    name: string;
+    url: string;
+    isActive: boolean;
+    isDefault: boolean;
+    status: string;
+  }[];
+};
+
+function buildSeededEndpointStorageState(
+  port: number = Number(process.env.TEST_SERVER_PORT) || 3099
+): SeededEndpointStorageState {
+  const endpoint = {
+    id: 'e2e-test-server',
+    name: 'E2E Test Server',
+    url: `http://localhost:${port}`,
+    isActive: true,
+    isDefault: false,
+    status: 'unknown'
+  };
+
+  return {
+    key: SERVER_ENDPOINTS_STORAGE_KEY,
+    removedKey: REMOVED_DEFAULT_KEYS_STORAGE_KEY,
+    endpoints: [endpoint]
+  };
+}
+
+function applySeededEndpointStorageState(storageState: SeededEndpointStorageState): void {
+  try {
+    const storage = window.localStorage;
+
+    storage.setItem(storageState.key, JSON.stringify(storageState.endpoints));
+    storage.setItem(storageState.removedKey, JSON.stringify(['default', 'toju-primary', 'toju-sweden']));
+  } catch {
+    // about:blank and some Playwright UI pages deny localStorage access.
+  }
+}
+
+export async function installTestServerEndpoint(
+  context: BrowserContext,
+  port: number = Number(process.env.TEST_SERVER_PORT) || 3099
+): Promise<void> {
+  const storageState = buildSeededEndpointStorageState(port);
+
+  await context.addInitScript(applySeededEndpointStorageState, storageState);
+}
+
+/**
+ * Seed localStorage with a single signal endpoint pointing at the test server.
+ * Must be called AFTER navigating to the app origin (localStorage is per-origin)
+ * but BEFORE the app reads from storage (i.e. before the Angular bootstrap is
+ * relied upon — calling it in the first goto() landing page is fine since the
+ * page will re-read on next navigation/reload).
+ *
+ * Typical usage:
+ *   await page.goto('/');
+ *   await seedTestServerEndpoint(page);
+ *   await page.reload();   // App now picks up the test endpoint
+ */
+export async function seedTestServerEndpoint(
+  page: Page,
+  port: number = Number(process.env.TEST_SERVER_PORT) || 3099
+): Promise<void> {
+  const storageState = buildSeededEndpointStorageState(port);
+
+  await page.evaluate(applySeededEndpointStorageState, storageState);
+}