@hayspec/spec/src/asserts/throws.ts

Core logic for Hayspec framework.

/**
 * 
 */
export default function throws (fn: () => any) {
  try {
    const res = fn();
    if (res instanceof Promise) {
      return res.then(() => false).catch(() => true);
    }
    else {
      return false;
    }
  }
  catch (e) {
    return true;
  }
}