Function resolvesNext

testing/mock.ts:1780–1807

(
  iterable:
    | Iterable<Return | Error | Promise<Return | Error>>
    | AsyncIterable<Return | Error | Promise<Return | Error>>,
)

 * @returns A function that resolves the awaited iterable values
 */
export function resolvesNext<
  Return,
  // deno-lint-ignore no-explicit-any
  Self = any,
  // deno-lint-ignore no-explicit-any
  Args extends unknown[] = any[],
>(
  iterable:
    | Iterable<Return | Error | Promise<Return | Error>>
    | AsyncIterable<Return | Error | Promise<Return | Error>>,
): (this: Self, ...args: Args) => Promise<Return> {
  const gen = (async function* returnsValue() {
    yield* iterable;
  })();
  let calls = 0;
  return async function () {
    const next = await gen.next();
    if (next.done) {
      throw new MockError(
        `Not expected to be called more than ${calls} time(s)`,
      );
    }
    calls++;
    const { value } = next;
    if (value instanceof Error) throw value;
    return value;
  };
}