Merge pull request #528 from thejustinwalsh/use-assets-types-bug

fix: ensure that useAssets does not infer type from data

package.json

@@ -66,6 +66,7 @@
     "@rollup/plugin-commonjs": "^25.0.8",
     "@rollup/plugin-json": "^6.1.0",
     "@rollup/plugin-node-resolve": "^15.2.3",
+    "@testing-library/react": "^16.0.0",
     "@types/eslint": "^8.56.10",
     "@types/react": "^18.3.2",
     "@types/react-reconciler": "0.28.8",
@@ -90,6 +91,9 @@
       "optional": true
     }
   },
+  "overrides": {
+    "rollup": "^4.18.0"
+  },
   "publishConfig": {
     "access": "public"
   },

src/hooks/useAsset.ts

@@ -15,9 +15,9 @@ import type { ErrorCallback } from '../typedefs/ErrorCallback';
 const errorCache: Map<UnresolvedAsset | string, AssetRetryState> = new Map();
 
 /** @deprecated Use `useAssets` instead. */
-export function useAsset<T>(
+export function useAsset<T = any>(
     /** @description Asset options. */
-    options: (UnresolvedAsset<T> & AssetRetryOptions) | string,
+    options: (UnresolvedAsset & AssetRetryOptions) | string,
     /** @description A function to be called when the asset loader reports loading progress. */
     onProgress?: ProgressCallback,
     /** @description A function to be called when the asset loader reports loading progress. */

src/hooks/useAssets.ts

@@ -21,14 +21,14 @@ function assetsLoadedTest<T>(asset: UnresolvedAsset<T>)
 /** Loads assets, returning a hash of assets once they're loaded. */
 export function useAssets<T = any>(
     /** @description Assets to be loaded. */
-    assets: UnresolvedAsset<T>[],
+    assets: UnresolvedAsset[],
 
     /** @description Asset options. */
     options: UseAssetsOptions = {},
 ): UseAssetsResult<T>
 {
     const [state, setState] = useState<UseAssetsResult<T>>({
-        assets: Array(assets.length).fill(null),
+        assets: Array(assets.length).fill(undefined),
         isError: false,
         isPending: true,
         isSuccess: false,

src/hooks/useSuspenseAssets.ts

@@ -18,7 +18,7 @@ function assetsLoadedTest<T>(asset: UnresolvedAsset<T>)
 /** Loads assets, returning a hash of assets once they're loaded. Must be inside of a `<Suspense>` component. */
 export function useSuspenseAssets<T = any>(
     /** @description Assets to be loaded. */
-    assets: UnresolvedAsset<T>[],
+    assets: UnresolvedAsset[],
     /** @description Asset options. */
     options: UseAssetsOptions = {},
 ): T[]

src/typedefs/UseAssetsResult.ts

@@ -2,8 +2,8 @@ import type { UseAssetsStatus } from '../constants/UseAssetsStatus';
 
 export interface UseAssetsResult<T>
 {
-    /** @description An array of resolved assets, or `null` for assets that are still loading. */
-    assets: (T | null)[];
+    /** @description An array of resolved assets, or `undefined` for assets that are still loading. */
+    assets: (T | undefined)[];
 
     /** @description The error that was encountered. */
     error?: Error;

test/unit/hooks/useAssets.test.tsx

@@ -0,0 +1,114 @@
+import { Assets, Cache, Sprite, Texture, type UnresolvedAsset } from 'pixi.js';
+import { afterAll, afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { extend, useAssets } from '../../../src';
+import { cleanup, renderHook, waitFor } from '@testing-library/react';
+
+extend({ Sprite });
+
+describe('useAssets', async () =>
+{
+    const assets: UnresolvedAsset[] = [{ src: 'test.png' }, { src: 'test2.png' }];
+
+    // Store the loaded assets and data state to verify the hook results
+    let loaded: Record<string, unknown> = {};
+    let data: Record<string, any> = {};
+
+    // Mock the Assets.load, Assets.get & Cache.has method
+    const load = vi.spyOn(Assets, 'load');
+    const get = vi.spyOn(Assets, 'get');
+    const has = vi.spyOn(Cache, 'has');
+
+    // Mock the Assets.load to populate the loaded record, and resolve after 1ms
+    load.mockImplementation((urls) =>
+    {
+        const assets = urls as UnresolvedAsset[];
+
+        return new Promise((resolve) =>
+        {
+            setTimeout(() =>
+            {
+                loaded = { ...loaded, ...assets.reduce((acc, val) => ({ ...acc, [val.src!.toString()]: Texture.EMPTY }), {}) };
+                data = { ...data, ...assets.reduce((acc, val) => ({ ...acc, [val.src!.toString()]: val.data }), {}) };
+                resolve(loaded);
+            }, 1);
+        });
+    });
+
+    // Mock the Assets.get to return the loaded record
+    get.mockImplementation((keys) =>
+        keys.reduce<Record<string, unknown>>((acc, key, idx) => ({ ...acc, [idx]: loaded[key] }), {}));
+
+    // Mock the Cache.has to check if the key is in the loaded record
+    has.mockImplementation((key) => key in loaded);
+
+    // Load the default results using Assets.load to compare against the results from the useAssets hook
+    const defaultResults = await Assets.load<Texture>(assets);
+
+    beforeEach(() =>
+    {
+        loaded = {};
+        data = {};
+    });
+
+    afterEach(() =>
+    {
+        cleanup();
+    });
+
+    afterAll(() =>
+    {
+        load.mockRestore();
+        get.mockRestore();
+    });
+
+    it('loads assets', async () =>
+    {
+        const { result } = renderHook(() => useAssets<Texture>(assets));
+
+        expect(result.current.isPending).toBe(true);
+        await waitFor(() => expect(result.current.isSuccess).toBe(true));
+
+        expect(result.current.assets).toEqual(assets.map(({ src }) => defaultResults[src!.toString()]));
+    });
+
+    it('accepts data', async () =>
+    {
+        // Explicitly type the T in the useAssets hook
+        const { result } = renderHook(() => useAssets<Texture>([
+            { src: 'test.png', data: { test: '7a1c8bee' } },
+            { src: 'test2.png', data: { test: '230a3f41' } },
+        ]));
+
+        expect(result.current.isPending).toBe(true);
+        await waitFor(() => expect(result.current.isSuccess).toBe(true));
+
+        const { assets: [texture], isSuccess } = result.current;
+
+        expect(isSuccess).toBe(true);
+        expect(data['test.png'].test).toBe('7a1c8bee');
+        expect(data['test2.png'].test).toBe('230a3f41');
+
+        const isTexture = (texture?: Texture) => texture && texture instanceof Texture;
+
+        expect(isTexture(texture)).toBe(true);
+    });
+
+    it('is properly typed with data', async () =>
+    {
+        // Do not provide a type for T in the useAssets hook
+        const { result } = renderHook(() => useAssets([
+            { src: 'test.png', data: { test: 'd460dbdd' } },
+        ]));
+
+        expect(result.current.isPending).toBe(true);
+        await waitFor(() => expect(result.current.isSuccess).toBe(true));
+
+        const { assets: [texture], isSuccess } = result.current;
+
+        expect(isSuccess).toBe(true);
+
+        const isTexture = (texture?: Texture) => texture && texture instanceof Texture;
+
+        expect(isTexture(texture)).toBe(true);
+    });
+});