Function base

packages/zod/src/v4/classic/tests/async-parsing.test.ts:330–343

(is_async?: boolean)

test("async validation multiple errors 2", async () => {
  const base = (is_async?: boolean) =>
    z.object({
      hello: z.string(),
      foo: z.object({
        bar: z.number().refine(
          is_async
            ? async () =>
                new Promise((resolve) => {
                  setTimeout(() => resolve(false), 500);
                })
            : () => false
        ),
      }),
    });

  const testval = { hello: 3, foo: { bar: 4 } };
  const result1 = base().safeParse(testval);