react-testing-library/dist/act-compat.js

Simple and complete React DOM testing utilities that encourage good testing practices.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.asyncAct = exports.default = void 0;

var _react = _interopRequireDefault(require("react"));

var _reactDom = _interopRequireDefault(require("react-dom"));

var _reactDom2 = require("./react-dom-16.9.0-is-released");

let reactAct;
let actSupported = false;
let asyncActSupported = false;

try {
  reactAct = require('react-dom/test-utils').act;
  actSupported = reactAct !== undefined;
  const originalError = console.error;
  let errorCalled = false;

  console.error = () => {
    errorCalled = true;
  };

  console.error.calls = [];
  /* istanbul ignore next */

  reactAct(() => ({
    then: () => {}
  })).then(() => {});
  /* istanbul ignore next */

  if (!errorCalled) {
    asyncActSupported = true;
  }

  console.error = originalError;
} catch (error) {} // ignore, this is to support old versions of react
// act is supported react-dom@16.8.0
// so for versions that don't have act from test utils
// we do this little polyfill. No warnings, but it's
// better than nothing.


function actPolyfill(cb) {
  _reactDom.default.unstable_batchedUpdates(cb);

  _reactDom.default.render(_react.default.createElement("div", null), document.createElement('div'));
}

const act = reactAct || actPolyfill;
let youHaveBeenWarned = false; // this will not avoid warnings that react-dom 16.8.0 logs for triggering
// state updates asynchronously, but at least we can tell people they need
// to upgrade to avoid the warnings.

async function asyncActPolyfill(cb) {
  // istanbul-ignore-next
  if (!youHaveBeenWarned && actSupported && _reactDom2.reactDomSixteenPointNineIsReleased) {
    // if act is supported and async act isn't and they're trying to use async
    // act, then they need to upgrade from 16.8 to 16.9.
    // This is a seemless upgrade, so we'll add a warning
    console.error(`It looks like you're using a version of react-dom that supports the "act" function, but not an awaitable version of "act" which you will need. Please upgrade to at least react-dom@16.9.0 to remove this warning.`);
    youHaveBeenWarned = true;
  }

  await cb(); // make all effects resolve after

  act(() => {});
} // istanbul ignore next


const asyncAct = asyncActSupported ? reactAct : asyncActPolyfill;
exports.asyncAct = asyncAct;
var _default = act;
/* eslint no-console:0 */

exports.default = _default;