Use .toHaveReturnedTimes to ensure that a mock object returned successfully an exact number of times

import { expect, fn, test } from "https://deno.land/x/unitest@$VERSION/mod.ts";

test("passes when mock object returned successfully times", () => {
  const mockObject = fn((a: number, b: number) => a + b);
  mockObject(1, 2);
  mockObject(3, 4);

  expect(mockObject).toHaveReturnedTimes(2);
});