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How to use shouldSuspend method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactSuspensePlaceholder-test.internal.js

Source:ReactSuspensePlaceholder-test.internal.js

1/**2 * Copyright (c) 2013-present, Facebook, Inc.3 *4 * This source code is licensed under the MIT license found in the5 * LICENSE file in the root directory of this source tree.6 *7 * @emails react-core8 * @jest-environment node9 */10// TODO: This does nothing since it was migrated from noop renderer to test11// renderer! Switch back to noop renderer, or add persistent mode to test12// renderer, or merge the two renderers into one somehow.13// runPlaceholderTests('ReactSuspensePlaceholder (mutation)', () =>14//   require('react-noop-renderer'),15// );16runPlaceholderTests('ReactSuspensePlaceholder (persistence)', () =>17  require('react-noop-renderer/persistent'),18);19function runPlaceholderTests(suiteLabel, loadReactNoop) {20  let advanceTimeBy;21  let mockNow;22  let Profiler;23  let React;24  let ReactTestRenderer;25  let ReactFeatureFlags;26  let ReactCache;27  let Suspense;28  let TextResource;29  let textResourceShouldFail;30  describe(suiteLabel, () => {31    beforeEach(() => {32      jest.resetModules();33      let currentTime = 0;34      mockNow = jest.fn().mockImplementation(() => currentTime);35      global.Date.now = mockNow;36      advanceTimeBy = amount => {37        currentTime += amount;38      };39      ReactFeatureFlags = require('shared/ReactFeatureFlags');40      ReactFeatureFlags.debugRenderPhaseSideEffectsForStrictMode = false;41      ReactFeatureFlags.enableProfilerTimer = true;42      ReactFeatureFlags.replayFailedUnitOfWorkWithInvokeGuardedCallback = false;43      React = require('react');44      ReactTestRenderer = require('react-test-renderer');45      ReactTestRenderer.unstable_setNowImplementation(mockNow);46      ReactCache = require('react-cache');47      Profiler = React.unstable_Profiler;48      Suspense = React.Suspense;49      TextResource = ReactCache.unstable_createResource(([text, ms = 0]) => {50        let listeners = null;51        let status = 'pending';52        let value = null;53        return {54          then(resolve, reject) {55            switch (status) {56              case 'pending': {57                if (listeners === null) {58                  listeners = [{resolve, reject}];59                  setTimeout(() => {60                    if (textResourceShouldFail) {61                      ReactTestRenderer.unstable_yield(62                        `Promise rejected [${text}]`,63                      );64                      status = 'rejected';65                      value = new Error('Failed to load: ' + text);66                      listeners.forEach(listener => listener.reject(value));67                    } else {68                      ReactTestRenderer.unstable_yield(69                        `Promise resolved [${text}]`,70                      );71                      status = 'resolved';72                      value = text;73                      listeners.forEach(listener => listener.resolve(value));74                    }75                  }, ms);76                } else {77                  listeners.push({resolve, reject});78                }79                break;80              }81              case 'resolved': {82                resolve(value);83                break;84              }85              case 'rejected': {86                reject(value);87                break;88              }89            }90          },91        };92      }, ([text, ms]) => text);93      textResourceShouldFail = false;94    });95    function Text({fakeRenderDuration = 0, text = 'Text'}) {96      advanceTimeBy(fakeRenderDuration);97      ReactTestRenderer.unstable_yield(text);98      return text;99    }100    function AsyncText({fakeRenderDuration = 0, ms, text}) {101      advanceTimeBy(fakeRenderDuration);102      try {103        TextResource.read([text, ms]);104        ReactTestRenderer.unstable_yield(text);105        return text;106      } catch (promise) {107        if (typeof promise.then === 'function') {108          ReactTestRenderer.unstable_yield(`Suspend! [${text}]`);109        } else {110          ReactTestRenderer.unstable_yield(`Error! [${text}]`);111        }112        throw promise;113      }114    }115    it('times out children that are already hidden', () => {116      class HiddenText extends React.PureComponent {117        render() {118          const text = this.props.text;119          ReactTestRenderer.unstable_yield(text);120          return <span hidden={true}>{text}</span>;121        }122      }123      function App(props) {124        return (125          <Suspense maxDuration={500} fallback={<Text text="Loading..." />}>126            <HiddenText text="A" />127            <span>128              <AsyncText ms={1000} text={props.middleText} />129            </span>130            <span>131              <Text text="C" />132            </span>133          </Suspense>134        );135      }136      // Initial mount137      const root = ReactTestRenderer.create(<App middleText="B" />, {138        unstable_isConcurrent: true,139      });140      expect(root).toFlushAndYield(['A', 'Suspend! [B]', 'C', 'Loading...']);141      expect(root).toMatchRenderedOutput(null);142      jest.advanceTimersByTime(1000);143      expect(ReactTestRenderer).toHaveYielded(['Promise resolved [B]']);144      expect(root).toFlushAndYield(['A', 'B', 'C']);145      expect(root).toMatchRenderedOutput(146        <React.Fragment>147          <span hidden={true}>A</span>148          <span>B</span>149          <span>C</span>150        </React.Fragment>,151      );152      // Update153      root.update(<App middleText="B2" />);154      expect(root).toFlushAndYield(['Suspend! [B2]', 'C', 'Loading...']);155      // Time out the update156      jest.advanceTimersByTime(750);157      expect(root).toFlushAndYield([]);158      expect(root).toMatchRenderedOutput('Loading...');159      // Resolve the promise160      jest.advanceTimersByTime(1000);161      expect(ReactTestRenderer).toHaveYielded(['Promise resolved [B2]']);162      expect(root).toFlushAndYield(['B2', 'C']);163      // Render the final update. A should still be hidden, because it was164      // given a `hidden` prop.165      expect(root).toMatchRenderedOutput(166        <React.Fragment>167          <span hidden={true}>A</span>168          <span>B2</span>169          <span>C</span>170        </React.Fragment>,171      );172    });173    it('times out text nodes', async () => {174      function App(props) {175        return (176          <Suspense maxDuration={500} fallback={<Text text="Loading..." />}>177            <Text text="A" />178            <AsyncText ms={1000} text={props.middleText} />179            <Text text="C" />180          </Suspense>181        );182      }183      // Initial mount184      const root = ReactTestRenderer.create(<App middleText="B" />, {185        unstable_isConcurrent: true,186      });187      expect(root).toFlushAndYield(['A', 'Suspend! [B]', 'C', 'Loading...']);188      expect(root).toMatchRenderedOutput(null);189      jest.advanceTimersByTime(1000);190      expect(ReactTestRenderer).toHaveYielded(['Promise resolved [B]']);191      expect(root).toFlushAndYield(['A', 'B', 'C']);192      expect(root).toMatchRenderedOutput('ABC');193      // Update194      root.update(<App middleText="B2" />);195      expect(root).toFlushAndYield(['A', 'Suspend! [B2]', 'C', 'Loading...']);196      // Time out the update197      jest.advanceTimersByTime(750);198      expect(root).toFlushAndYield([]);199      expect(root).toMatchRenderedOutput('Loading...');200      // Resolve the promise201      jest.advanceTimersByTime(1000);202      expect(ReactTestRenderer).toHaveYielded(['Promise resolved [B2]']);203      expect(root).toFlushAndYield(['A', 'B2', 'C']);204      // Render the final update. A should still be hidden, because it was205      // given a `hidden` prop.206      expect(root).toMatchRenderedOutput('AB2C');207    });208    describe('profiler durations', () => {209      let App;210      let onRender;211      beforeEach(() => {212        // Order of parameters: id, phase, actualDuration, treeBaseDuration213        onRender = jest.fn();214        const Fallback = () => {215          ReactTestRenderer.unstable_yield('Fallback');216          advanceTimeBy(10);217          return 'Loading...';218        };219        const Suspending = () => {220          ReactTestRenderer.unstable_yield('Suspending');221          advanceTimeBy(2);222          return <AsyncText ms={1000} text="Loaded" fakeRenderDuration={1} />;223        };224        App = ({shouldSuspend, text = 'Text', textRenderDuration = 5}) => {225          ReactTestRenderer.unstable_yield('App');226          return (227            <Profiler id="root" onRender={onRender}>228              <Suspense maxDuration={500} fallback={<Fallback />}>229                {shouldSuspend && <Suspending />}230                <Text fakeRenderDuration={textRenderDuration} text={text} />231              </Suspense>232            </Profiler>233          );234        };235      });236      describe('when suspending during mount', () => {237        it('properly accounts for base durations when a suspended times out in a sync tree', () => {238          const root = ReactTestRenderer.create(<App shouldSuspend={true} />);239          expect(root.toJSON()).toEqual('Loading...');240          expect(onRender).toHaveBeenCalledTimes(1);241          // Initial mount only shows the "Loading..." Fallback.242          // The treeBaseDuration then should be 10ms spent rendering Fallback,243          // but the actualDuration should also include the 8ms spent rendering the hidden tree.244          expect(onRender.mock.calls[0][2]).toBe(18);245          expect(onRender.mock.calls[0][3]).toBe(10);246          jest.advanceTimersByTime(1000);247          expect(root.toJSON()).toEqual(['Loaded', 'Text']);248          expect(onRender).toHaveBeenCalledTimes(2);249          // When the suspending data is resolved and our final UI is rendered,250          // the baseDuration should only include the 1ms re-rendering AsyncText,251          // but the treeBaseDuration should include the full 8ms spent in the tree.252          expect(onRender.mock.calls[1][2]).toBe(1);253          expect(onRender.mock.calls[1][3]).toBe(8);254        });255        it('properly accounts for base durations when a suspended times out in a concurrent tree', () => {256          const root = ReactTestRenderer.create(<App shouldSuspend={true} />, {257            unstable_isConcurrent: true,258          });259          expect(root).toFlushAndYield([260            'App',261            'Suspending',262            'Suspend! [Loaded]',263            'Text',264            'Fallback',265          ]);266          expect(root).toMatchRenderedOutput(null);267          // Show the fallback UI.268          jest.advanceTimersByTime(750);269          expect(root).toMatchRenderedOutput('Loading...');270          expect(onRender).toHaveBeenCalledTimes(1);271          // Initial mount only shows the "Loading..." Fallback.272          // The treeBaseDuration then should be 10ms spent rendering Fallback,273          // but the actualDuration should also include the 8ms spent rendering the hidden tree.274          expect(onRender.mock.calls[0][2]).toBe(18);275          expect(onRender.mock.calls[0][3]).toBe(10);276          // Resolve the pending promise.277          jest.advanceTimersByTime(250);278          expect(ReactTestRenderer).toHaveYielded([279            'Promise resolved [Loaded]',280          ]);281          expect(root).toFlushAndYield(['Suspending', 'Loaded', 'Text']);282          expect(root).toMatchRenderedOutput('LoadedText');283          expect(onRender).toHaveBeenCalledTimes(2);284          // When the suspending data is resolved and our final UI is rendered,285          // both times should include the 8ms re-rendering Suspending and AsyncText.286          expect(onRender.mock.calls[1][2]).toBe(8);287          expect(onRender.mock.calls[1][3]).toBe(8);288        });289      });290      describe('when suspending during update', () => {291        it('properly accounts for base durations when a suspended times out in a sync tree', () => {292          const root = ReactTestRenderer.create(293            <App shouldSuspend={false} textRenderDuration={5} />,294          );295          expect(root.toJSON()).toEqual('Text');296          expect(onRender).toHaveBeenCalledTimes(1);297          // Initial mount only shows the "Text" text.298          // It should take 5ms to render.299          expect(onRender.mock.calls[0][2]).toBe(5);300          expect(onRender.mock.calls[0][3]).toBe(5);301          root.update(<App shouldSuspend={true} textRenderDuration={5} />);302          expect(root.toJSON()).toEqual('Loading...');303          expect(onRender).toHaveBeenCalledTimes(2);304          // The suspense update should only show the "Loading..." Fallback.305          // Both durations should include 10ms spent rendering Fallback306          // plus the 8ms rendering the (hidden) components.307          expect(onRender.mock.calls[1][2]).toBe(18);308          expect(onRender.mock.calls[1][3]).toBe(18);309          root.update(310            <App shouldSuspend={true} text="New" textRenderDuration={6} />,311          );312          expect(root.toJSON()).toEqual('Loading...');313          expect(onRender).toHaveBeenCalledTimes(3);314          // If we force another update while still timed out,315          // but this time the Text component took 1ms longer to render.316          // This should impact both actualDuration and treeBaseDuration.317          expect(onRender.mock.calls[2][2]).toBe(19);318          expect(onRender.mock.calls[2][3]).toBe(19);319          jest.advanceTimersByTime(1000);320          expect(root.toJSON()).toEqual(['Loaded', 'New']);321          expect(onRender).toHaveBeenCalledTimes(4);322          // When the suspending data is resolved and our final UI is rendered,323          // the baseDuration should only include the 1ms re-rendering AsyncText,324          // but the treeBaseDuration should include the full 9ms spent in the tree.325          expect(onRender.mock.calls[3][2]).toBe(1);326          expect(onRender.mock.calls[3][3]).toBe(9);327        });328        it('properly accounts for base durations when a suspended times out in a concurrent tree', () => {329          const root = ReactTestRenderer.create(330            <App shouldSuspend={false} textRenderDuration={5} />,331            {332              unstable_isConcurrent: true,333            },334          );335          expect(root).toFlushAndYield(['App', 'Text']);336          expect(root).toMatchRenderedOutput('Text');337          expect(onRender).toHaveBeenCalledTimes(1);338          // Initial mount only shows the "Text" text.339          // It should take 5ms to render.340          expect(onRender.mock.calls[0][2]).toBe(5);341          expect(onRender.mock.calls[0][3]).toBe(5);342          root.update(<App shouldSuspend={true} textRenderDuration={5} />);343          expect(root).toFlushAndYield([344            'App',345            'Suspending',346            'Suspend! [Loaded]',347            'Text',348            'Fallback',349          ]);350          expect(root).toMatchRenderedOutput('Text');351          // Show the fallback UI.352          jest.advanceTimersByTime(750);353          expect(root).toMatchRenderedOutput('Loading...');354          expect(onRender).toHaveBeenCalledTimes(2);355          // The suspense update should only show the "Loading..." Fallback.356          // The actual duration should include 10ms spent rendering Fallback,357          // plus the 8ms render all of the hidden, suspended subtree.358          // But the tree base duration should only include 10ms spent rendering Fallback,359          // plus the 5ms rendering the previously committed version of the hidden tree.360          expect(onRender.mock.calls[1][2]).toBe(18);361          expect(onRender.mock.calls[1][3]).toBe(15);362          // Update again while timed out.363          root.update(364            <App shouldSuspend={true} text="New" textRenderDuration={6} />,365          );366          expect(root).toFlushAndYield([367            'App',368            'Suspending',369            'Suspend! [Loaded]',370            'New',371            'Fallback',372          ]);373          expect(root).toMatchRenderedOutput('Loading...');374          expect(onRender).toHaveBeenCalledTimes(2);375          // Resolve the pending promise.376          jest.advanceTimersByTime(250);377          expect(ReactTestRenderer).toHaveYielded([378            'Promise resolved [Loaded]',379          ]);380          expect(root).toFlushAndYield(['App', 'Suspending', 'Loaded', 'New']);381          expect(onRender).toHaveBeenCalledTimes(3);382          // When the suspending data is resolved and our final UI is rendered,383          // both times should include the 6ms rendering Text,384          // the 2ms rendering Suspending, and the 1ms rendering AsyncText.385          expect(onRender.mock.calls[2][2]).toBe(9);386          expect(onRender.mock.calls[2][3]).toBe(9);387        });388      });389    });390  });...

ReactSuspenseFuzz-test.internal.js

Source:ReactSuspenseFuzz-test.internal.js

1let React;2let Suspense;3let ReactTestRenderer;4let ReactFeatureFlags;5let Random;6const SEED = 0;7const prettyFormatPkg = require('pretty-format');8function prettyFormat(thing) {9  return prettyFormatPkg(thing, {10    plugins: [11      prettyFormatPkg.plugins.ReactElement,12      prettyFormatPkg.plugins.ReactTestComponent,13    ],14  });15}16describe('ReactSuspenseFuzz', () => {17  beforeEach(() => {18    jest.resetModules();19    ReactFeatureFlags = require('shared/ReactFeatureFlags');20    ReactFeatureFlags.debugRenderPhaseSideEffectsForStrictMode = false;21    ReactFeatureFlags.replayFailedUnitOfWorkWithInvokeGuardedCallback = false;22    React = require('react');23    Suspense = React.Suspense;24    ReactTestRenderer = require('react-test-renderer');25    Random = require('random-seed');26  });27  function createFuzzer() {28    const {useState, useContext, useLayoutEffect} = React;29    const ShouldSuspendContext = React.createContext(true);30    let pendingTasks = new Set();31    let cache = new Map();32    function resetCache() {33      pendingTasks = new Set();34      cache = new Map();35    }36    function Container({children, updates}) {37      const [step, setStep] = useState(0);38      useLayoutEffect(39        () => {40          if (updates !== undefined) {41            const cleanUps = new Set();42            updates.forEach(({remountAfter}, i) => {43              const task = {44                label: `Remount childen after ${remountAfter}ms`,45              };46              const timeoutID = setTimeout(() => {47                pendingTasks.delete(task);48                ReactTestRenderer.unstable_yield(task.label);49                setStep(i + 1);50              }, remountAfter);51              pendingTasks.add(task);52              cleanUps.add(() => {53                pendingTasks.delete(task);54                clearTimeout(timeoutID);55              });56            });57            return () => {58              cleanUps.forEach(cleanUp => cleanUp());59            };60          }61        },62        [updates],63      );64      return <React.Fragment key={step}>{children}</React.Fragment>;65    }66    function Text({text, initialDelay = 0, updates}) {67      const [[step, delay], setStep] = useState([0, initialDelay]);68      useLayoutEffect(69        () => {70          if (updates !== undefined) {71            const cleanUps = new Set();72            updates.forEach(({beginAfter, suspendFor}, i) => {73              const task = {74                label: `Update ${beginAfter}ms after mount and suspend for ${suspendFor}ms [${text}]`,75              };76              const timeoutID = setTimeout(() => {77                pendingTasks.delete(task);78                ReactTestRenderer.unstable_yield(task.label);79                setStep([i + 1, suspendFor]);80              }, beginAfter);81              pendingTasks.add(task);82              cleanUps.add(() => {83                pendingTasks.delete(task);84                clearTimeout(timeoutID);85              });86            });87            return () => {88              cleanUps.forEach(cleanUp => cleanUp());89            };90          }91        },92        [updates],93      );94      const fullText = `${text}:${step}`;95      const shouldSuspend = useContext(ShouldSuspendContext);96      let resolvedText;97      if (shouldSuspend && delay > 0) {98        resolvedText = cache.get(fullText);99        if (resolvedText === undefined) {100          const thenable = {101            then(resolve) {102              const task = {label: `Promise resolved [${fullText}]`};103              pendingTasks.add(task);104              setTimeout(() => {105                cache.set(fullText, fullText);106                pendingTasks.delete(task);107                ReactTestRenderer.unstable_yield(task.label);108                resolve();109              }, delay);110            },111          };112          cache.set(fullText, thenable);113          ReactTestRenderer.unstable_yield(`Suspended! [${fullText}]`);114          throw thenable;115        } else if (typeof resolvedText.then === 'function') {116          const thenable = resolvedText;117          ReactTestRenderer.unstable_yield(`Suspended! [${fullText}]`);118          throw thenable;119        }120      } else {121        resolvedText = fullText;122      }123      ReactTestRenderer.unstable_yield(resolvedText);124      return resolvedText;125    }126    function renderToRoot(127      root,128      children,129      {shouldSuspend} = {shouldSuspend: true},130    ) {131      root.update(132        <ShouldSuspendContext.Provider value={shouldSuspend}>133          {children}134        </ShouldSuspendContext.Provider>,135      );136      root.unstable_flushAll();137      let elapsedTime = 0;138      while (pendingTasks && pendingTasks.size > 0) {139        if ((elapsedTime += 1000) > 1000000) {140          throw new Error('Something did not resolve properly.');141        }142        ReactTestRenderer.act(() => jest.advanceTimersByTime(1000));143        root.unstable_flushAll();144      }145      return root.toJSON();146    }147    function testResolvedOutput(unwrappedChildren) {148      const children = (149        <Suspense fallback="Loading...">{unwrappedChildren}</Suspense>150      );151      const expectedRoot = ReactTestRenderer.create(null);152      const expectedOutput = renderToRoot(expectedRoot, children, {153        shouldSuspend: false,154      });155      expectedRoot.unmount();156      resetCache();157      const syncRoot = ReactTestRenderer.create(null);158      const syncOutput = renderToRoot(syncRoot, children);159      expect(syncOutput).toEqual(expectedOutput);160      syncRoot.unmount();161      resetCache();162      const concurrentRoot = ReactTestRenderer.create(null, {163        unstable_isConcurrent: true,164      });165      const concurrentOutput = renderToRoot(concurrentRoot, children);166      expect(concurrentOutput).toEqual(expectedOutput);167      concurrentRoot.unmount();168      concurrentRoot.unstable_flushAll();169      ReactTestRenderer.unstable_clearYields();170    }171    function pickRandomWeighted(rand, options) {172      let totalWeight = 0;173      for (let i = 0; i < options.length; i++) {174        totalWeight += options[i].weight;175      }176      let remainingWeight = rand.floatBetween(0, totalWeight);177      for (let i = 0; i < options.length; i++) {178        const {value, weight} = options[i];179        remainingWeight -= weight;180        if (remainingWeight <= 0) {181          return value;182        }183      }184    }185    function generateTestCase(rand, numberOfElements) {186      let remainingElements = numberOfElements;187      function createRandomChild(hasSibling) {188        const possibleActions = [189          {value: 'return', weight: 1},190          {value: 'text', weight: 1},191        ];192        if (hasSibling) {193          possibleActions.push({value: 'container', weight: 1});194          possibleActions.push({value: 'suspense', weight: 1});195        }196        const action = pickRandomWeighted(rand, possibleActions);197        switch (action) {198          case 'text': {199            remainingElements--;200            const numberOfUpdates = pickRandomWeighted(rand, [201              {value: 0, weight: 8},202              {value: 1, weight: 4},203              {value: 2, weight: 1},204            ]);205            let updates = [];206            for (let i = 0; i < numberOfUpdates; i++) {207              updates.push({208                beginAfter: rand.intBetween(0, 10000),209                suspendFor: rand.intBetween(0, 10000),210              });211            }212            return (213              <Text214                text={(remainingElements + 9).toString(36).toUpperCase()}215                initialDelay={rand.intBetween(0, 10000)}216                updates={updates}217              />218            );219          }220          case 'container': {221            const numberOfUpdates = pickRandomWeighted(rand, [222              {value: 0, weight: 8},223              {value: 1, weight: 4},224              {value: 2, weight: 1},225            ]);226            let updates = [];227            for (let i = 0; i < numberOfUpdates; i++) {228              updates.push({229                remountAfter: rand.intBetween(0, 10000),230              });231            }232            remainingElements--;233            const children = createRandomChildren(3);234            return React.createElement(Container, {updates}, ...children);235          }236          case 'suspense': {237            remainingElements--;238            const children = createRandomChildren(3);239            const maxDuration = pickRandomWeighted(rand, [240              {value: undefined, weight: 1},241              {value: rand.intBetween(0, 5000), weight: 1},242            ]);243            const fallbackType = pickRandomWeighted(rand, [244              {value: 'none', weight: 1},245              {value: 'normal', weight: 1},246              {value: 'nested suspense', weight: 1},247            ]);248            let fallback;249            if (fallbackType === 'normal') {250              fallback = 'Loading...';251            } else if (fallbackType === 'nested suspense') {252              fallback = React.createElement(253                React.Fragment,254                null,255                ...createRandomChildren(3),256              );257            }258            return React.createElement(259              Suspense,260              {maxDuration, fallback},261              ...children,262            );263          }264          case 'return':265          default:266            return null;267        }268      }269      function createRandomChildren(limit) {270        const children = [];271        while (remainingElements > 0 && children.length < limit) {272          children.push(createRandomChild(children.length > 0));273        }274        return children;275      }276      const children = createRandomChildren(Infinity);277      return React.createElement(React.Fragment, null, ...children);278    }279    return {Container, Text, testResolvedOutput, generateTestCase};280  }281  it('basic cases', () => {282    // This demonstrates that the testing primitives work283    const {Container, Text, testResolvedOutput} = createFuzzer();284    testResolvedOutput(285      <Container updates={[{remountAfter: 150}]}>286        <Text287          text="Hi"288          initialDelay={2000}289          updates={[{beginAfter: 100, suspendFor: 200}]}290        />291      </Container>,292    );293  });294  it('hard-coded cases', () => {295    const {Text, testResolvedOutput} = createFuzzer();296    testResolvedOutput(297      <React.Fragment>298        <Text299          initialDelay={20}300          text="A"301          updates={[{beginAfter: 10, suspendFor: 20}]}302        />303        <Suspense fallback="Loading... (B)">304          <Text305            initialDelay={10}306            text="B"307            updates={[{beginAfter: 30, suspendFor: 50}]}308          />309          <Text text="C" />310        </Suspense>311      </React.Fragment>,312    );313  });314  it('generative tests', () => {315    const {generateTestCase, testResolvedOutput} = createFuzzer();316    const rand = Random.create(SEED);317    const NUMBER_OF_TEST_CASES = 500;318    const ELEMENTS_PER_CASE = 12;319    for (let i = 0; i < NUMBER_OF_TEST_CASES; i++) {320      const randomTestCase = generateTestCase(rand, ELEMENTS_PER_CASE);321      try {322        testResolvedOutput(randomTestCase);323      } catch (e) {324        console.log(`325Failed fuzzy test case:326${prettyFormat(randomTestCase)}327`);328        throw e;329      }330    }331  });...

Using AI Code Generation

1const { shouldSuspend } = require('playwright/lib/utils/suspendable');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  const frame = page.mainFrame();7  const element = await frame.waitForSelector('input[name="q"]');8  const result = await shouldSuspend(element, () => element.getAttribute('name'));9  await browser.close();10})();11module.exports = {12  use: {13    viewport: { width: 1280, height: 720 },14  },15    {16      use: {17      },18    },19    {20      use: {21      },22    },23    {24      use: {25      },26    },27};28const { test, expect } = require('@playwright/test');29test('basic test', async ({ page }) => {30  const title = page.locator('.navbar__inner .navbar__title');31  await expect(title).toHaveText('Playwright');32});

Using AI Code Generation

1const { shouldSuspend } = require('playwright/lib/server/supplements/recorder/recorderSupplement');2const { Page } = require('playwright/lib/server/page');3const { Frame } = require('playwright/lib/server/frame');4const { JSHandle } = require('playwright/lib/server/jsHandle');5const { ElementHandle } = require('playwright/lib/server/dom');6const { Worker } = require('playwright/lib/server/worker');7const { shouldSuspend } = require('playwright/lib/server/supplements/recorder/recorderSupplement');8const { Page } = require('playwright/lib/server/page');9const { Frame } = require('playwright/lib/server/frame');10const { JSHandle } = require('playwright/lib/server/jsHandle');11const { ElementHandle } = require('playwright/lib/server/dom');12const { Worker } = require('playwright/lib/server/worker');13const { shouldSuspend } = require('playwright/lib/server/supplements/recorder/recorderSupplement');14const { Page } = require('playwright/lib/server/page');15const { Frame } = require('playwright/lib/server/frame');16const { JSHandle } = require('playwright/lib/server/jsHandle');17const { ElementHandle } = require('playwright/lib/server/dom');18const { Worker } = require('playwright/lib/server/worker');19const { shouldSuspend } = require('playwright/lib/server/supplements/recorder/recorderSupplement');20const { Page } = require('playwright/lib/server/page');21const { Frame } = require('playwright/lib/server/frame');22const { JSHandle } = require('playwright/lib/server/jsHandle');23const { ElementHandle } = require('playwright/lib/server/dom');24const { Worker } = require('playwright/lib/server/worker');25const { shouldSuspend } = require('playwright/lib/server/supplements/recorder/recorderSupplement');26const { Page } = require('playwright/lib/server/page');27const { Frame } = require('playwright/lib/server/frame');28const { JSHandle } = require('playwright/lib/server/jsHandle');29const { ElementHandle } = require('playwright/lib/server/dom');30const { Worker } = require('playwright/lib/server/worker');31const { shouldSuspend } = require('

Using AI Code Generation

1const { Playwright } = require('playwright');2const playwright = Playwright.create();3const browser = await playwright.chromium.launch();4const context = await browser.newContext();5const page = await context.newPage();6const shouldSuspend = page._delegate.shouldSuspend.bind(page._delegate);7const result = await shouldSuspend();8console.log(result);9await browser.close();

Using AI Code Generation

1const { shouldSuspend } = require('playwright/lib/internal/supplements/utils/suspender');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch({ headless: false });5  const context = await browser.newContext();6  const page = await context.newPage();7  await browser.close();8})();

Using AI Code Generation

1const { shouldSuspend } = require('playwright/lib/internal/supplements/recorder/supplements/recorderSupplement.js');2const { Page } = require('playwright/lib/server/page.js');3const { Frame } = require('playwright/lib/server/frame.js');4const { Page } = require('playwright/lib/server/page.js');5const { Frame } = require('playwright/lib/server/frame.js');6const { Page } = require('playwright/lib/server/page.js');7const { Frame } = require('playwright/lib/server/frame.js');8const { Page } = require('playwright/lib/server/page.js');9const { Frame } = require('playwright/lib/server/frame.js');10const { Page } = require('playwright/lib/server/page.js');11const { Frame } = require('playwright/lib/server/frame.js');12const { Page } = require('playwright/lib/server/page.js');13const { Frame } = require('playwright/lib/server/frame.js');14const { Page } = require('playwright/lib/server/page.js');15const { Frame } = require('playwright/lib/server/frame.js');16const { Page } = require('playwright/lib/server/page.js');17const { Frame } = require('playwright/lib/server/frame.js');18const { Page } = require('playwright/lib/server/page.js');19const { Frame } = require('playwright/lib/server/frame.js');20const { Page } = require('playwright/lib/server/page.js');21const { Frame } = require('playwright/lib/server/frame.js');22const { Page } = require('playwright/lib/server/page.js');23const { Frame } = require('playwright/lib/server/frame.js');24const { Page } = require('playwright/lib/server/page.js');25const { Frame } = require('playwright/lib/server/frame.js');26const { Page } = require('playwright/lib/server/page.js');27const { Frame } = require('playwright/lib/server/frame

Using AI Code Generation

1const { shouldSuspend } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');2const { Page } = require('playwright');3const page = new Page();4const frame = page.mainFrame();5const shouldSuspendResult = shouldSuspend(frame, 'click', {selector: '.foo'});6console.log(shouldSuspendResult);

Using AI Code Generation

1const { shouldSuspend } = require('playwright/lib/server/chromium/crNetworkManager');2const request = {3  headers: {4    'user-agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.117 Safari/537.36'5  }6};7const result = shouldSuspend(request);8console.log(result);

Using AI Code Generation

1const { shouldSuspend } = require('playwright/lib/internal');2const { isUnderTest } = require('playwright/lib/utils/utils');3const { isUnderTest } = require('playwright/lib/utils/utils');4const { isUnderTest } = require('playwright/lib/utils/utils');5isUnderTest() && shouldSuspend();6const { shouldSuspend } = require('playwright/lib/internal');7const { isUnderTest } = require('playwright/lib/utils/utils');8const { isUnderTest } = require('playwright/lib/utils/utils');9const { isUnderTest } = require('playwright/lib/utils/utils');10isUnderTest() && shouldSuspend();11const { shouldSuspend } = require('playwright/lib/internal');12const { isUnderTest } = require('playwright/lib/utils/utils');13const { isUnderTest } = require('playwright/lib/utils/utils');14const { isUnderTest } = require('playwright/lib/utils/utils');15isUnderTest() && shouldSuspend();16const { shouldSuspend } = require('playwright/lib/internal');17const { isUnderTest } = require('playwright/lib/utils/utils');18const { isUnderTest } = require('playwright/lib/utils/utils');19const { isUnderTest } = require('playwright/lib/utils/utils');20isUnderTest() && shouldSuspend();21const { shouldSuspend } = require('playwright/lib/internal');22const { isUnderTest } = require('playwright/lib/utils/utils');23const { isUnderTest } = require('playwright/lib/utils/utils');24const { isUnderTest } = require('playwright/lib/utils/utils');25isUnderTest() && shouldSuspend();26const { shouldSuspend } = require('playwright/lib/internal');27const { isUnderTest } = require('playwright/lib/utils/utils');28const { isUnderTest } = require('playwright/lib/utils/utils');29const { isUnderTest } = require('playwright/lib/utils/utils');30isUnderTest() && shouldSuspend();31const { shouldSuspend } = require('playwright/lib/internal');32const { isUnderTest } = require('playwright/lib/utils/utils');

Using AI Code Generation

1const { shouldSuspend } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement.js');2const { test } = require('@playwright/test');3test('my test', async ({ page }) => {4  await page.click('text=Get started');5  await shouldSuspend(page);6});7{8  "scripts": {9  },10  "devDependencies": {11  }12}

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.