ReactCPUSuspense-test.js — react Source File

Source Code

/* eslint-disable react/jsx-boolean-value */

let React;
let ReactNoop;
let Scheduler;
let act;
let Suspense;
let useState;
let textCache;

let readText;
let resolveText;
// let rejectText;

let assertLog;
let waitForPaint;

describe('ReactSuspenseWithNoopRenderer', () => {
  beforeEach(() => {
    jest.resetModules();

    React = require('react');
    ReactNoop = require('react-noop-renderer');
    Scheduler = require('scheduler');
    act = require('internal-test-utils').act;
    Suspense = React.Suspense;
    useState = React.useState;

    const InternalTestUtils = require('internal-test-utils');
    assertLog = InternalTestUtils.assertLog;
    waitForPaint = InternalTestUtils.waitForPaint;

    textCache = new Map();

    readText = text => {
      const record = textCache.get(text);
      if (record !== undefined) {
        switch (record.status) {
          case 'pending':
            throw record.promise;
          case 'rejected':
            throw Error('Failed to load: ' + text);
          case 'resolved':
            return text;
        }
      } else {
        let ping;
        const promise = new Promise(resolve => (ping = resolve));
        const newRecord = {
          status: 'pending',
          ping: ping,
          promise,
        };
        textCache.set(text, newRecord);
        throw promise;
      }
    };

    resolveText = text => {
      const record = textCache.get(text);
// ... (231 more lines)