ActivityLegacySuspense-test.js — react Source File

Source Code

let React;
let ReactNoop;
let Scheduler;
let act;
let LegacyHidden;
let Activity;
let Suspense;
let useState;
let useEffect;
let startTransition;
let textCache;
let waitFor;
let waitForPaint;
let assertLog;

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

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

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

    textCache = new Map();
  });

  function resolveText(text) {
    const record = textCache.get(text);
    if (record === undefined) {
      const newRecord = {
        status: 'resolved',
        value: text,
      };
      textCache.set(text, newRecord);
    } else if (record.status === 'pending') {
      const thenable = record.value;
      record.status = 'resolved';
      record.value = text;
      thenable.pings.forEach(t => t());
    }
  }

  function readText(text) {
    const record = textCache.get(text);
    if (record !== undefined) {
      switch (record.status) {
        case 'pending':
          Scheduler.log(`Suspend! [${text}]`);
// ... (538 more lines)