fix(e2e): allow fixture server state requests

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: ghgoodreau

tests/api-mocking/MockServerE2E.ts

@@ -21,6 +21,7 @@ import PortManager, { ResourceType } from '../framework/PortManager.ts';
 import {
   FALLBACK_GANACHE_PORT,
   FALLBACK_DAPP_SERVER_PORT,
+  FALLBACK_FIXTURE_SERVER_PORT,
 } from '../framework/Constants.ts';
 import { DEFAULT_ANVIL_PORT } from '../seeder/anvil-manager.ts';
 import { logLiveMetaMetricsPostIfDebug } from '../helpers/analytics/analyticsDebug.ts';
@@ -124,6 +125,8 @@ const translateFallbackPortToActual = (url: string): string => {
       if (actualPort === undefined) {
         actualPort = portManager.getPort(ResourceType.ANVIL);
       }
+    } else if (portNum === FALLBACK_FIXTURE_SERVER_PORT) {
+      actualPort = portManager.getPort(ResourceType.FIXTURE_SERVER);
     } else if (portNum === DEFAULT_ANVIL_PORT) {
       actualPort = portManager.getPort(ResourceType.ANVIL);
     } else if (
@@ -152,12 +155,33 @@ const translateFallbackPortToActual = (url: string): string => {
   }
 };
 
+const isFixtureServerStateUrl = (url: string): boolean => {
+  try {
+    const parsedUrl = new URL(url);
+    const port = parseInt(parsedUrl.port, 10);
+    const fixtureServerPort = PortManager.getInstance().getPort(
+      ResourceType.FIXTURE_SERVER,
+    );
+
+    return (
+      parsedUrl.pathname === '/state.json' &&
+      (port === FALLBACK_FIXTURE_SERVER_PORT || port === fixtureServerPort)
+    );
+  } catch {
+    return false;
+  }
+};
+
 const isUrlAllowed = (url: string): boolean => {
   try {
     if (ALLOWLISTED_URLS.includes(url)) {
       return true;
     }
 
+    if (isFixtureServerStateUrl(url)) {
+      return true;
+    }
+
     // Malformed npm: package URIs that leak through the snap proxy
     // e.g. https://https//npm:@metamask/... or npm:@metamask/...
     if (/^(?:https?:\/\/.*)?npm[:@]@?metamask\//.test(url)) {