test: re-enable ws test (#4842)

Author: fvictorio

packages/hardhat-core/src/internal/hardhat-network/provider/provider.ts

@@ -650,9 +650,11 @@ export class EdrProviderWrapper
 
   private _ethEventListener(event: SubscriptionEvent) {
     const subscription = `0x${event.filterId.toString(16)}`;
-    const result = event.result;
-    this._emitLegacySubscriptionEvent(subscription, result);
-    this._emitEip1193SubscriptionEvent(subscription, result);
+    const results = Array.isArray(event.result) ? event.result : [event.result];
+    for (const result of results) {
+      this._emitLegacySubscriptionEvent(subscription, result);
+      this._emitEip1193SubscriptionEvent(subscription, result);
+    }
   }
 
   private _emitLegacySubscriptionEvent(subscription: string, result: any) {

packages/hardhat-core/test/internal/hardhat-network/provider/modules/eth/websocket.ts

@@ -381,8 +381,7 @@ describe("Eth module", function () {
           return onPending;
         });
 
-        // TODO: https://github.com/NomicFoundation/edr/issues/279
-        it.skip("contract events work", async function () {
+        it("contract events work", async function () {
           const signer = await provider.getSigner();
           const Factory = new ethers.ContractFactory<[], ethers.Contract>(
             EXAMPLE_CONTRACT.abi,