Function isPromise

packages/effect/src/Predicate.ts:844–847

(
  input: unknown
)

 * @see isPromiseLike
 */
export const isPromise = (
  input: unknown
): input is Promise<unknown> =>
  hasProperty(input, "then") && "catch" in input && isFunction(input.then) && isFunction(input.catch)

/**
 * A refinement that checks if a value is `PromiseLike`. It performs a duck-typing