refactor: use explicit Promise methods in asyncAttempt tests

Author: strozw

async_attempt.ts

@@ -1,4 +1,4 @@
-import { Result } from "./attempt.ts";
+import type { Result } from "./attempt.ts";
 
 export type AsyncResult<T, E> = Promise<Result<T, E>>;
 

async_attempt_test.ts

@@ -3,13 +3,11 @@ import { assertEquals } from "@std/assert";
 import { asyncAttempt } from "./async_attempt.ts";
 
 test("asyncAttempt should return a Success<T> when the async function is successful", async () => {
-  const result = await asyncAttempt(async () => 1);
+  const result = await asyncAttempt(() => Promise.resolve(1));
   assertEquals(result, [undefined, 1]);
 });
 
 test("asyncAttempt should return a Failure<E> when the async function is failed", async () => {
-  const result = await asyncAttempt(async () => {
-    throw "err";
-  });
+  const result = await asyncAttempt(() => Promise.reject("err"));
   assertEquals(result, ["err", undefined]);
 });