Scaffold playwright

e2e/support/relayMocks.ts

@@ -0,0 +1,30 @@
+import type {Page} from "@playwright/test"
+import type {RelayMockConfig} from "../../src/lib/test/relayMocks"
+
+// Must match RELAY_MOCKS_KEY in src/lib/test/relayMocks.ts.
+const RELAY_MOCKS_KEY = "__RELAY_MOCKS__"
+
+// Hard safety net: intercept every real websocket so a test can never reach the network, even if
+// some code path opens a socket directly (e.g. relay AUTH) rather than going through the adapter
+// layer. We never call route.connectToServer(), so the socket connects to Playwright's in-process
+// mock and simply receives nothing.
+export const blockWebsockets = (page: Page) => page.routeWebSocket(/^wss?:\/\//, () => {})
+
+// Inject the relay-mock config the app reads on startup. addInitScript runs before any page script
+// on every navigation, so this must be called before page.goto().
+export const injectRelayConfig = (page: Page, config: RelayMockConfig) =>
+  page.addInitScript(
+    ([key, value]) => {
+      Object.assign(window, {[key]: value})
+    },
+    [RELAY_MOCKS_KEY, config] as const,
+  )
+
+// Full network isolation plus optional fixtures, in one call. With no config, every relay returns
+// nothing (requirement 1). Pass {relays: {url: events}} to populate specific relays (requirement 2).
+export const setupRelayMocks = async (page: Page, config: RelayMockConfig = {}) => {
+  await blockWebsockets(page)
+  await injectRelayConfig(page, config)
+}
+
+export type {RelayMockConfig}