feat: add idle timeout and fix subscription race (#12093)

web3.js/test/__mocks__/rpc-websockets.js

@@ -1,10 +1,6 @@
 // @flow
 
-import {
-  Client as RpcWebSocketClient,
-  NodeWebSocketTypeOptions,
-  IWSClientAdditionalOptions,
-} from 'rpc-websockets';
+import {Client as LiveClient} from 'rpc-websockets';
 
 // Define TEST_LIVE in the environment to test against the real full node
 // identified by `url` instead of using the mock
@@ -12,49 +8,24 @@ export const mockRpcEnabled = !process.env.TEST_LIVE;
 
 let mockNotice = true;
 
-export class Client {
-  client: RpcWebSocketClient;
-
-  constructor(
-    url: string,
-    options: NodeWebSocketTypeOptions & IWSClientAdditionalOptions,
-  ) {
-    //console.log('MockClient', url, options);
-    if (!mockRpcEnabled) {
-      if (mockNotice) {
-        console.log(
-          'Note: rpc-websockets mock is disabled, testing live against',
-          url,
-        );
-        mockNotice = false;
-      }
-      this.client = new RpcWebSocketClient(url, options);
+class MockClient {
+  constructor(url: string) {
+    if (mockNotice) {
+      console.log(
+        'Note: rpc-websockets mock is disabled, testing live against',
+        url,
+      );
+      mockNotice = false;
     }
   }
 
-  connect() {
-    if (!mockRpcEnabled) {
-      return this.client.connect();
-    }
-  }
-
-  close() {
-    if (!mockRpcEnabled) {
-      return this.client.close();
-    }
-  }
-
-  on(event: string, callback: Function) {
-    if (!mockRpcEnabled) {
-      return this.client.on(event, callback);
-    }
-    //console.log('on', event);
-  }
-
-  async call(method: string, params: Object): Promise<Object> {
-    if (!mockRpcEnabled) {
-      return await this.client.call(method, params);
-    }
+  connect() {}
+  close() {}
+  on() {}
+  call(): Promise<Object> {
     throw new Error('call unsupported');
   }
 }
+
+const Client = mockRpcEnabled ? MockClient : LiveClient;
+export {Client};