/**
 * Predicates for the test environment under which a UniDriver is running.
 *
 * Callers pass the result of `await base.getNative()` and branch the code path
 * themselves — this module owns detection only, never dispatch.
 *
 * - **jest** (jsdom): `getNative()` returns a DOM `HTMLElement`.
 * - **sled-2** (Puppeteer): `getNative()` returns `{ element, page, selector }`;
 *   `page.evaluate` is the original marker used across the codebase.
 * - **sled-3** (Playwright): `getNative()` returns a Playwright `Locator`, which
 *   exposes a `.locator(selector)` method (Puppeteer's `ElementHandle` does not).
 */

type AnyObj = Record<string, unknown>;

const isObject = (value: unknown): value is AnyObj =>
  typeof value === 'object' && value !== null;

export const isSled2 = (native: unknown): boolean =>
  isObject(native) &&
  isObject(native.page) &&
  typeof native.page.evaluate === 'function';

export const isSled3 = (native: unknown): boolean =>
  isObject(native) && typeof native.locator === 'function';