test: build server function with unused destructured variable

Author: katywings

apps/tests/src/e2e/server-function.test.ts

@@ -98,4 +98,11 @@ test.describe("server-function", () => {
     await page.goto("http://localhost:3000/server-function-unused-trycatch");
     await expect(page.locator("#server-fn-test")).toContainText("false");
   });
+
+  test("should build with a server function including an unused destructured variable", async ({
+    page,
+  }) => {
+    await page.goto("http://localhost:3000/server-function-unused-destructure");
+    await expect(page.locator("#server-fn-test")).toContainText("false");
+  });
 });

apps/tests/src/routes/server-function-unused-destructure.tsx

@@ -0,0 +1,28 @@
+import { createEffect, createSignal } from "solid-js";
+
+function serverFnDestructure() {
+  "use server";
+
+  const rawItems = [{ id: "", age: 42 }];
+  const items: { age: number }[] = [];
+  for (const { id, ...rest } of rawItems) {
+    items.push(rest);
+  }
+
+  return false;
+}
+
+export default function App() {
+  const [output, setOutput] = createSignal<boolean>();
+
+  createEffect(async () => {
+    const result = await serverFnDestructure();
+    setOutput(result);
+  });
+
+  return (
+    <main>
+      <span id="server-fn-test">{JSON.stringify(output())}</span>
+    </main>
+  );
+}