Add tests for project asset storage

tests/serialization/project-asset-storage.test.ts

@@ -0,0 +1,27 @@
+import { describe, expect, it } from "vitest";
+
+import { createProjectAssetStorageKey } from "../../src/assets/project-assets";
+import { createInMemoryProjectAssetStorage } from "../../src/assets/project-asset-storage";
+
+describe("project asset storage", () => {
+  it("stores, clones, and deletes binary asset payloads", async () => {
+    const storage = createInMemoryProjectAssetStorage();
+    const storageKey = createProjectAssetStorageKey("asset-model-triangle");
+    const bytes = new Uint8Array([0, 1, 2, 3, 4]).buffer;
+
+    await storage.putAsset(storageKey, {
+      bytes,
+      mimeType: "model/gltf+json"
+    });
+
+    const loadedAsset = await storage.getAsset(storageKey);
+
+    expect(loadedAsset).not.toBeNull();
+    expect(loadedAsset?.mimeType).toBe("model/gltf+json");
+    expect(Array.from(new Uint8Array(loadedAsset?.bytes ?? new ArrayBuffer(0)))).toEqual([0, 1, 2, 3, 4]);
+
+    await storage.deleteAsset(storageKey);
+
+    await expect(storage.getAsset(storageKey)).resolves.toBeNull();
+  });
+});