Statum/tests/markdown/shim.js

/**
 * Minimal DOM shim so js/statum.js can be loaded under QuickJS.
 *
 * statum.js is an IIFE that attaches `window.statum` and calls autoInit()
 * at load time. autoInit() only needs `document.readyState` (we report
 * 'loading' so it registers a DOMContentLoaded listener instead of running),
 * and the rest of the boot path is never exercised by the markdown tests.
 *
 * Set `__STATUM_TEST__` before loading statum.js to expose
 * `statum._testMarkdown` (see the comment at the bottom of statum.js).
 */
export function installShim() {
  var listeners = {};

  function makeElement() {
    return {
      tagName: 'DIV', style: {}, dataset: {}, attributes: [], children: [],
      setAttribute: function () {}, removeAttribute: function () {},
      hasAttribute: function () { return false; },
      getAttribute: function () { return null; },
      addEventListener: function () {}, removeEventListener: function () {},
      appendChild: function (c) { return c; },
      removeChild: function (c) { return c; },
      replaceWith: function () {},
      querySelectorAll: function () { return []; },
      querySelector: function () { return null; },
      classList: { add: function () {}, remove: function () {}, contains: function () { return false; } },
      contains: function () { return false; }
    };
  }

  globalThis.console = {
    log: function () {}, warn: function () {}, error: function () {},
    info: function () {}, debug: function () {}
  };
  globalThis.document = {
    readyState: 'loading', cookie: '',
    head: makeElement(), body: makeElement(), documentElement: makeElement(),
    addEventListener: function (t, f) { (listeners[t] = listeners[t] || []).push(f); },
    removeEventListener: function () {},
    getElementById: function () { return null; },
    querySelectorAll: function () { return []; },
    querySelector: function () { return null; },
    createElement: function () { return makeElement(); },
    createTextNode: function (t) { return { nodeType: 3, textContent: t }; }
  };
  globalThis.window = globalThis;
  globalThis.location = { href: 'http://localhost/', protocol: 'http:', addEventListener: function () {} };
  globalThis.navigator = { userAgent: 'qjs' };
  globalThis.addEventListener = function (t, f) { (listeners[t] = listeners[t] || []).push(f); };
  globalThis.removeEventListener = function () {};
  globalThis.__STATUM_TEST__ = true;
}