test(utils): test resolveAfter utils

packages/utils/tests/resolveAfter.test.ts

@@ -0,0 +1,24 @@
+import { resolveAfter } from '../src/resolveAfter';
+
+describe('resolveAfter', () => {
+    jest.useFakeTimers();
+
+    it('resolves after specified time', async () => {
+        const { promise } = resolveAfter(200, 'foo');
+
+        jest.advanceTimersByTime(200);
+
+        await expect(promise).resolves.toBe('foo');
+    });
+
+    it('rejects if the promise is rejected', async () => {
+        const { promise, reject } = resolveAfter(200);
+
+        // Reject the promise after 100ms
+        setTimeout(() => reject(new Error('bar')), 100);
+
+        jest.advanceTimersByTime(100);
+
+        await expect(promise).rejects.toThrow('bar');
+    });
+});