Fix flags tests and tweak RN docs

Author: roncohen

packages/browser-sdk/test/flagCache.test.ts

@@ -35,7 +35,6 @@ export function newCache(): {
           cacheItem[0] = value;
         },
       },
-      storageKey: "flags-cache",
       staleTimeMs: TEST_STALE_MS,
       expireTimeMs: TEST_EXPIRE_MS,
     }),

packages/browser-sdk/test/flags.test.ts

@@ -5,7 +5,7 @@ import { FLAGS_EXPIRE_MS } from "../src/config";
 import { FlagsClient, RawFlag } from "../src/flag/flags";
 import { HttpClient } from "../src/httpClient";
 
-import { flagsResult } from "./mocks/handlers";
+import { flagResponse, flagsResult } from "./mocks/handlers";
 import { newCache, TEST_STALE_MS } from "./flagCache.test";
 import { testLogger } from "./testLogger";
 
@@ -26,6 +26,12 @@ function flagsClientFactory() {
 
   vi.spyOn(httpClient, "get");
   vi.spyOn(httpClient, "post");
+  vi.spyOn(globalThis, "fetch").mockResolvedValue(
+    new Response(JSON.stringify(flagResponse), {
+      status: 200,
+      headers: { "Content-Type": "application/json" },
+    }),
+  );
 
   return {
     cache,

packages/react-sdk/README.md

@@ -163,8 +163,8 @@ An Expo example app lives at `packages/react-sdk/dev/expo`.
 AsyncStorage is automatically detected in React Native if you have
 `@react-native-async-storage/async-storage` installed.
 
-Since the toolbar is not available in React Native, you can set local overrides
-programmatically:
+If you have your own toolbar-like UI in React Native, you can set local
+overrides programmatically:
 
 ```tsx
 const client = useClient();