refactor(nodes): dedupe camera payload and node resolve helpers

src/test-utils/camera-url-test-helpers.ts

@@ -0,0 +1,21 @@
+import * as fs from "node:fs/promises";
+import { vi } from "vitest";
+
+export function stubFetchResponse(response: Response) {
+  vi.stubGlobal(
+    "fetch",
+    vi.fn(async () => response),
+  );
+}
+
+export function stubFetchTextResponse(text: string, init?: ResponseInit) {
+  stubFetchResponse(new Response(text, { status: 200, ...init }));
+}
+
+export async function readFileUtf8AndCleanup(filePath: string): Promise<string> {
+  try {
+    return await fs.readFile(filePath, "utf8");
+  } finally {
+    await fs.unlink(filePath).catch(() => {});
+  }
+}