Remove filterAsync method

Author: kamilogorek

packages/utils/src/async.ts

@@ -8,20 +8,3 @@ export function forget(promise: Promise<any>): void {
     console.error(e);
   });
 }
-
-/**
- * Helper to filter an array with asynchronous callbacks.
- *
- * @param array An array containing items to filter.
- * @param predicate An async predicate evaluated on every item.
- * @param thisArg Optional value passed as "this" into the callback.
- * @returns An array containing only values where the callback returned true.
- */
-export async function filterAsync<T>(
-  array: T[],
-  predicate: (item: T) => Promise<boolean> | boolean,
-  thisArg?: any,
-): Promise<T[]> {
-  const verdicts = await Promise.all(array.map(predicate, thisArg));
-  return array.filter((_, index) => verdicts[index]);
-}

packages/utils/test/async.test.ts

@@ -20,50 +20,3 @@ describe('forget', () => {
     });
   });
 });
-
-describe('filterAsync', () => {
-  test('filters with sync predicate', async () => {
-    expect.assertions(1);
-    const filtered = await filterAsync([1, 2, 3, 4], i => i > 2);
-    expect(filtered).toEqual([3, 4]);
-  });
-
-  test('filters with async predicate', async () => {
-    expect.assertions(1);
-
-    const predicate = async (i: number) =>
-      new Promise<boolean>(resolve =>
-        setTimeout(() => {
-          resolve(i > 2);
-        }, i * 100),
-      );
-
-    const filtered = await filterAsync([1, 2, 3, 4], predicate);
-    expect(filtered).toEqual([3, 4]);
-  });
-
-  test('passes filter arguments to the predicate', async () => {
-    expect.assertions(1);
-
-    const arr = [1];
-    const predicate = jest.fn();
-
-    await filterAsync(arr, predicate);
-    expect(predicate).toHaveBeenCalledWith(1, 0, arr);
-  });
-
-  test('passes this to the predicate', async () => {
-    expect.assertions(1);
-
-    const that = {};
-    await filterAsync(
-      [1],
-      function predicate(this: {}): boolean {
-        // tslint:disable-next-line:no-inferred-empty-object-type
-        expect(this).toBe(that);
-        return false;
-      },
-      that,
-    );
-  });
-});