Fix Jest mock returning undefined in v2.0.0 (#1842)

* Mocking FlashList and exporting RV is no longer necessary since it's already exported by default

* Fix async operation warning  in LayoutCommitObserver tests

Author: naqvitalha

jestSetup.js

@@ -1,12 +1,3 @@
-jest.mock("@shopify/flash-list", () => {
-  const RecyclerView = jest.requireActual("@shopify/flash-list").RecyclerView;
-
-  return {
-    ...jest.requireActual("@shopify/flash-list"),
-    FlashList: RecyclerView,
-  };
-});
-
 jest.mock("@shopify/flash-list/dist/recyclerview/utils/measureLayout", () => {
   const originalModule = jest.requireActual(
     "@shopify/flash-list/dist/recyclerview/utils/measureLayout"

src/__tests__/LayoutCommitObserver.test.tsx

@@ -1,9 +1,9 @@
 import React from "react";
 import { render } from "@quilted/react-testing";
 
-import { RecyclerView } from "../recyclerview/RecyclerView";
 import { useFlashListContext } from "../recyclerview/RecyclerViewContextProvider";
 import { LayoutCommitObserver } from "../recyclerview/LayoutCommitObserver";
+import { FlashList } from "..";
 
 describe("LayoutCommitObserver", () => {
   it("should not alter ref captured by child", () => {
@@ -20,7 +20,7 @@ describe("LayoutCommitObserver", () => {
     let commitLayoutEffectCount = 0;
 
     const content = (
-      <RecyclerView
+      <FlashList
         testID="parent"
         data={[1]}
         renderItem={() => (
@@ -29,7 +29,7 @@ describe("LayoutCommitObserver", () => {
               commitLayoutEffectCount++;
             }}
           >
-            <RecyclerView
+            <FlashList
               testID="child"
               data={[1]}
               renderItem={() => (
@@ -53,8 +53,11 @@ describe("LayoutCommitObserver", () => {
       />
     );
 
-    render(content);
+    const renderResult = render(content);
 
     expect(commitLayoutEffectCount).toBe(3);
+
+    // Force unmount to trigger cleanup of async operations
+    renderResult.unmount();
   });
 });

src/__tests__/RecyclerView.test.tsx

@@ -4,7 +4,7 @@ import "@quilted/react-testing/matchers";
 import { render } from "@quilted/react-testing";
 
 import { FlashListRef } from "../FlashListRef";
-import { RecyclerView } from "../recyclerview/RecyclerView";
+import { FlashList } from "..";
 
 // Mock measureLayout to return fixed dimensions
 jest.mock("../recyclerview/utils/measureLayout", () => {
@@ -49,7 +49,7 @@ const renderRecyclerView = (args: {
     data,
   } = args;
   return render(
-    <RecyclerView
+    <FlashList
       ref={ref}
       data={
         data ?? [