How to use mapRemainingChildren method in Playwright Internal

Best JavaScript code snippet using playwright-internal

react-dom.js

Source:react-dom.js Github

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...163 newFiber.effectTag = PLACEMENT;164 return lastPlacedIndex;165 }166}167function mapRemainingChildren(returnFiber, currentFirstChild) {168 const existingChildren = new Map();169 // let exitChild = currentFirstChild;170 // while (exitChild) {171 // let key = exitChild.key || exitChild.index;172 // console.log("mapRemainingChildren", key);173 // existingChildren.set(key, exitChild);174 // exitChild = exitChild.sibling;175 // }176 // return existingChildren;177 let existingChild = currentFirstChild;178 while (existingChild) {179 if (existingChild.key !== null) {180 existingChildren.set(existingChild.key, existingChild);181 } else {182 existingChildren.set(existingChild.index, existingChild);183 }184 existingChild = existingChild.sibling;185 }186 return existingChildren;187}188function reconcileChildren(returnFiber, children) {189 if (returnFiber.type === "ul") {190 console.log("returnFiber", returnFiber);191 }192 //几内亚193 let prevNewFiber = null;194 //oldfiber 的第一个child195 let oldFiber = returnFiber.base && returnFiber.base.child;196 //记录下一个oldfiber197 let nextOldFiber = null;198 //记录上次的插入位置199 let lastPlacedIndex = 0;200 //新节点的索引201 let newIndex = 0;202 //是否是更新标识203 let shouldTrackSideEffects = true;204 if (!oldFiber) {205 shouldTrackSideEffects = false;206 }207 //更新，子节点位置相同208 for (; oldFiber !== null && newIndex < children.length; newIndex++) {209 //疑问210 if (oldFiber.index > newIndex) {211 nextOldFiber = oldFiber;212 oldFiber = null;213 } else {214 nextOldFiber = oldFiber.sibling;215 }216 let newChild = children[newIndex];217 if (!(newChild.key === oldFiber.key && newChild.type === oldFiber.type)) {218 //新旧节点不一样，跳出当前diff219 if (oldFiber === null) {220 oldFiber = nextOldFiber;221 }222 break;223 }224 const newFiber = {225 key: newChild.key,226 type: newChild.type,227 props: newChild.props,228 node: oldFiber.node,229 base: oldFiber,230 return: returnFiber,231 effectTag: UPDATE,232 };233 lastPlacedIndex = placeChild(234 newFiber,235 lastPlacedIndex,236 newIndex,237 shouldTrackSideEffects238 );239 if (prevNewFiber === null) {240 returnFiber.child = newFiber;241 } else {242 prevNewFiber.sibling = newFiber;243 }244 prevNewFiber = newFiber;245 //疑问246 oldFiber = nextOldFiber;247 }248 //新children全部遍历完成,删除剩余老children249 if (newIndex === children.length) {250 while (oldFiber) {251 deletions.push({252 ...oldFiber,253 effectTag: DELETION,254 });255 oldFiber = oldFiber.sibling;256 }257 }258 //老节点遍历完毕，新节点还有，插入，或者首次渲染，插入新节点259 if (oldFiber === null) {260 for (; newIndex < children.length; newIndex++) {261 let newChild = children[newIndex];262 const newFiber = {263 key: newChild.key,264 type: newChild.type,265 props: newChild.props,266 node: null,267 base: null,268 return: returnFiber,269 effectTag: PLACEMENT,270 };271 lastPlacedIndex = placeChild(272 newFiber,273 newIndex,274 lastPlacedIndex,275 shouldTrackSideEffects276 );277 if (prevNewFiber === null) {278 //构建新节点的fiber链表279 returnFiber.child = newFiber;280 } else {281 prevNewFiber.sibling = newFiber;282 }283 prevNewFiber = newFiber;284 }285 return;286 }287 //新老节点都还有，乱序更新288 const exitOldMap = mapRemainingChildren(returnFiber, oldFiber);289 for (; newIndex < children.length; newIndex++) {290 let newChild = children[newIndex];291 let newFiber = {292 key: newChild.key,293 type: newChild.type,294 props: newChild.props,295 return: returnFiber,296 base: null,297 node: null,298 effectTag: PLACEMENT,299 };300 // let key = newChild.key !== null ? newChild.key : newIndex;301 // let matchFiber = exitOldMap.get(key);302 let matchFiber = exitOldMap.get(303 newChild.key === null ? newIndex : newChild.key304 );305 if (matchFiber) {306 newFiber = {307 ...newFiber,308 node: matchFiber.node,309 base: matchFiber,310 effectTag: UPDATE,311 };312 // shouldTrackSideEffects && exitOldMap.delete(key);313 shouldTrackSideEffects &&314 exitOldMap.delete(newFiber.key === null ? newIndex : newFiber.key);315 }316 lastPlacedIndex = placeChild(317 newFiber,318 lastPlacedIndex,319 newIndex,320 shouldTrackSideEffects321 );322 if (prevNewFiber === null) {323 returnFiber.child = newFiber;324 } else {325 prevNewFiber.sibling = newFiber;326 }327 prevNewFiber = newFiber;328 }329 //更新阶段 乱序更新后 oldMap还有值的话，全部删除330 if (shouldTrackSideEffects) {331 exitOldMap.forEach((child) => {332 deletions.push({333 ...child,334 effectTag: DELETION,335 });336 });337 }338}339function reconcileChildren_teacher(returnFiber, newChildren) {340 let previousNewFiber = null;341 // oldfiber 的第一个子fiber342 let oldFiber = returnFiber.base && returnFiber.base.child;343 // 记录上次的插入位置344 let lastPlacedIndex = 0;345 // 做累加，遍历newChildren数组346 let newIdx = 0;347 // oldFiber的中转，记录下个oldFiber348 let nextOldFiber = null;349 let shouldTrackSideEffects = true;350 if (!oldFiber) {351 // 初次渲染352 shouldTrackSideEffects = false;353 }354 // 1. 界面更新阶段 相对位置没有发生变化 这行这个循环355 for (; oldFiber !== null && newIdx < newChildren.length; newIdx++) {356 // 判断相对位置357 // old 1 2 3_ 4358 // new 1 2 3 4 _359 if (oldFiber.index > newIdx) {360 nextOldFiber = oldFiber;361 oldFiber = null;362 } else {363 nextOldFiber = oldFiber.sibling;364 }365 let newChild = newChildren[newIdx];366 if (!(newChild.key === oldFiber.key && newChild.type === oldFiber.type)) {367 if (oldFiber === null) {368 oldFiber = nextOldFiber;369 }370 break;371 }372 const newFiber = {373 key: newChild.key,374 type: newChild.type,375 props: newChild.props,376 node: oldFiber.node,377 base: oldFiber,378 return: returnFiber,379 effectTag: UPDATE,380 };381 lastPlacedIndex = placeChild(382 newFiber,383 lastPlacedIndex,384 newIdx,385 shouldTrackSideEffects386 );387 if (previousNewFiber === null) {388 returnFiber.child = newFiber;389 } else {390 previousNewFiber.sibling = newFiber;391 }392 previousNewFiber = newFiber;393 // !394 oldFiber = nextOldFiber;395 }396 if (newIdx === newChildren.length) {397 // We've reached the end of the new children. We can delete the rest.398 // deleteRemainingChildren(returnFiber, oldFiber);399 // return resultingFirstChild;400 while (oldFiber) {401 deletions.push({402 ...oldFiber,403 effectTag: DELETION,404 });405 oldFiber = oldFiber.sibling;406 }407 }408 //2. 新增fiber 老链表已经遍历完409 if (oldFiber === null) {410 for (; newIdx < newChildren.length; newIdx++) {411 let newChild = newChildren[newIdx];412 const newFiber = {413 key: newChild.key,414 type: newChild.type,415 props: newChild.props,416 node: null,417 base: null,418 return: returnFiber,419 effectTag: PLACEMENT,420 };421 lastPlacedIndex = placeChild(422 newFiber,423 lastPlacedIndex,424 newIdx,425 shouldTrackSideEffects426 );427 if (previousNewFiber === null) {428 returnFiber.child = newFiber;429 } else {430 previousNewFiber.sibling = newFiber;431 }432 previousNewFiber = newFiber;433 }434 return;435 }436 // 3. 新老链表都有参数值437 // 1->2-》3-》4->5438 // [1,2,3,4]439 // 生成map图，方便链表查找、设置和删除440 const existingChildren = mapRemainingChildren(returnFiber, oldFiber);441 for (; newIdx < newChildren.length; newIdx++) {442 let newChild = newChildren[newIdx];443 let newFiber = {444 key: newChild.key,445 type: newChild.type,446 props: newChild.props,447 return: returnFiber,448 // node: null,449 // base: null,450 // effectTag: PLACEMENT451 };452 // 判断新增还是复用453 let matchedFiber = existingChildren.get(454 newChild.key === null ? newIdx : newChild.key...

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react-diff.js

Source:react-diff.js Github

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...102 created.return = returnFiber;103 return created;104}105// 将所有老节点添加到Map对象中106function mapRemainingChildren(returnFiber, currentFirstChild) {107 const existingChildren = new Map();108 let existingChild = currentFirstChild;109 while (existingChild !== null) {110 // key 不为null 元素节点111 if (existingChild.key !== null) {112 existingChildren.set(existingChild.key, existingChild);113 } else {114 // 不存在key 则使用index代替115 existingChildren.set(existingChild.index, existingChild);116 }117 existingChild = existingChild.sibling;118 }119 return existingChildren;120}121function updateFromMap(existingChildren, returnFiber, newIdx, newChild) {122 // 新节点是文本节点123 if (typeof newChild === 'string' || typeof newChild === 'number') {124 const matchedFiber = existingChildren.get(newIdx) || null; // 找index相同的节点复用125 return updateTextNode(returnFiber, matchedFiber, '' + newChild);126 }127 // newChild是元素节点的情况128 if (typeof newChild === 'object' && newChild !== null) {129 if (newChild.$$typeof === REACT_ELEMENT_TYPE) {130 const matchedFiber =131 existingChildren.get(newChild.key ? newChild.key : newChild.index) ||132 null;133 // 返回更新后的元素节点134 return updateElement(returnFiber, matchedFiber, newChild);135 }136 }137 return null;138}139function createChild(returnFiber, newChild) {140 // 处理文本节点141 if (typeof newChild === 'string' || typeof newChild === 'number') {142 const created = createFiberFromText('' + newChild, returnFiber.mode);143 created.return = returnFiber;144 return created;145 }146 // 处理元素节点147 if (typeof newChild === 'object' && newChild !== null) {148 if (newChild.$$typeof === REACT_ELEMENT_TYPE) {149 const created = createFiberFromElement(newChild, returnFiber.mode);150 created.ref = coerceRef(returnFiber, null, newChild);151 created.return = returnFiber;152 return created;153 }154 }155 return null;156}157function createFiberFromText(content, mode) {158 const fiber = createFiber(HostText, content, null);159 return fiber;160}161function createFiberFromElement(element, mode) {162 let owner = null;163 const type = element.type;164 const key = element.key;165 const pendingProps = element.props;166 const fiber = createFiberFromTypeAndProps(167 type,168 key,169 pendingProps,170 owner,171 mode172 );173 return fiber;174}175function coerceRef(returnFiber, current, element) {176 return element.ref;177}178// 新节点是包含多个节点的数组179function reconcileChildrenArray(returnFiber, currentFirstChild, newChildren) {180 let resultingFirstChild = null;181 let previousNewFiber = null;182 let oldFiber = currentFirstChild;183 let lastPlacedIndex = 0;184 let newIdx = 0;185 let nextOldFiber = null;186 // 第一次遍历，对比同位置的节点是否一样187 for (; oldFiber !== null && newIdx < newChildren.length; newIdx++) {188 if (oldFiber.index > newIdx) {189 nextOldFiber = oldFiber;190 oldFiber = null;191 } else {192 nextOldFiber = oldFiber.sibling;193 }194 // updateSlot 比对新老节点，返回null 表示旧节点不可复用，否则返回可复用的节点，即旧节点195 const newFiber = updateSlot(returnFiber, oldFiber, newChildren[newIdx]);196 if (newFiber === null) {197 if (oldFiber === null) {198 oldFiber = nextOldFiber;199 }200 break;201 }202 if (shouldTrackSideEffects) {203 if (oldFiber && newFiber.alternate === null) {204 deleteChild(returnFiber, oldFiber);205 }206 }207 // 给newFiber添加flags标识208 lastPlaceIndex = placeChild(newFiber, lastPlacedIndex, newIdx);209 if (previousNewFiber === null) {210 resultingFirstChild = newFiber; // 链表头211 } else {212 previousNewFiber.sibling = newFiber;213 }214 previousNewFiber = newFiber;215 oldFiber = nextOldFiber;216 }217 // 新节点已经全部遍历完毕218 if (newIdx === newChildren.length) {219 // 删除剩余的节点220 deleteRemainingChildren(returnFiber, oldFiber);221 return resultingFirstChild;222 }223 // 老节点遍历完毕，新节点中剩下的则为新创建的224 if (oldFiber === null) {225 for (; newIdx < newChildren.length; newIdx++) {226 const newFiber = createChild(returnFiber, newChildren[newIdx], lanes);227 if (newFiber === null) {228 continue;229 }230 lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);231 if (previousNewFiber === null) {232 resultingFirstChild = newFiber;233 } else {234 previousNewFiber.sibling = newFiber;235 }236 previousNewFiber = newFiber;237 }238 return resultingFirstChild;239 }240 // 处理需要移动节点的情况，即旧节点中存在可复用，位置变化的节点241 const existingChildren = mapRemainingChildren(returnFiber, oldFiber);242 // 处理剩余的新节点243 for (; newIdx < newChildren.length; newIdx++) {244 const newFiber = updateFromMap(245 existingChildren,246 returnFiber,247 newIdx,248 newChildren[newIndex]249 );250 if (newFiber !== null) {251 if (shouldTrackSideEffects) {252 if (newFiber.alternate !== null) {253 // newFiber复用的旧节点已经被复用了，从existingChildren删除此节点254 existingChildren.delete(255 newFiber.key === null ? newIdx : newFiber.key...

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reconcileChildren.js

Source:reconcileChildren.js Github

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...46 };47 let prevSibling = null;48 let isPlacementEqualPrevSibling = false;49 let oldFiber = fiberParent.alternate?.child || null;50 const existingChildren = mapRemainingChildren(oldFiber);5152 if(existingChildren.size && !elements.length) {53 if(!(fiberParent.action === Update && fiberParent.tag === fiberParent.alternate?.tag)) {54 addDeletion({55 action: Deletion,56 tag: 'all',57 parent: fiberParent.alternate,58 })59 return;60 }61 }6263 const existingChildrenAtMutation = new Map(existingChildren);64 ...

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ReactChildFiber.js

Source:ReactChildFiber.js Github

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...83 return84 }85 86 // 87 const existingChildren = mapRemainingChildren(oldFiber)88 for(; newIndex<newChildren.length;newIndex++){89 const newChild = newChildren[newIndex]90 if(newChild === null){91 continue92 }93 const newFiber = createFiber(newChild, reutrnFiber)94 lastPlacedIndex = placeChild(95 newFiber,96 lastPlacedIndex,97 newIndex,98 shouldTrackSideEffects99 )100 let matchedFiber = existingChildren.get(newFiber.key||newFiber.index)101 if(matchedFiber){102 existingChildren.delete(newFiber.key||newFiber.index)103 Object.assign(newFiber,{104 alternate: matchedFiber,105 stateNode:matchedFiber.stateNode,106 flags:Update,107 })108 }109 if(previouseNewFiber === null){110 reutrnFiber = newFiber111 }else{112 previouseNewFiber.sibling = newFiber113 }114 previouseNewFiber = newFiber115 }116 if(shouldTrackSideEffects){117 existingChildren.forEach(each=>deleteChild(reutrnFiber,each))118 }119}120// 判断同一个节点，服用121// 调用前提是同一个层级下122function sameNode(a,b) {123 return !!(a&&b&&a.key===b.key&&a.type===b.type)124}125function deleteChild(reutrnFiber, childToDelete) {126 childToDelete.flags = Deletion127 if(reutrnFiber.deletions){128 reutrnFiber.deletions.push(childToDelete)129 }else{130 reutrnFiber.deletions = [childToDelete]131 }132}133// 删除某个节点的所有后续兄弟节点134function deleteRemainingChildren(reutrnFiber, currentFirstChild){135 let childToDelete = currentFirstChild;136 while(childToDelete){137 deleteChild(reutrnFiber, childToDelete)138 childToDelete = childToDelete.sibling139 }140}141function placeChild(142 newFiber,143 lastPlacedIndex,144 newIndex,145 shouldTrackSideEffects // 是不是初次渲染146) {147 newFiber.index = newIndex148 if(!shouldTrackSideEffects){149 return lastPlacedIndex150 }151 const current = newFiber.alternate152 if(current){153 const oldIndex = current.index154 if(oldIndex < lastPlacedIndex){155 newFiber.flags = Placement156 return lastPlacedIndex157 }else{158 return oldIndex159 }160 }else{161 newFiber.flags = Placement162 return lastPlacedIndex163 }164}165// 链表转map166function mapRemainingChildren(currentFirstChild){167 const existingChildren = new Map()168 let existingChild = currentFirstChild169 while(existingChild){170 existingChildren.set(171 existingChild.key||existingChild.index,172 existingChild173 )174 existingChild = existingChild.sibling175 }176 return existingChildren...

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Using AI Code Generation

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1const { mapRemainingChildren } = require('playwright/lib/server/dom.js');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const element = await page.$('input[name="q"]');8 const input = await element.asElement();9 const children = await mapRemainingChildren(input);10 console.log(children);11 await browser.close();12})();13 {14 'attributes': {15 },16 }

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Using AI Code Generation

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1const { Page } = require('playwright');2async function test() {3 const page = new Page();4 await page.setContent('<div>1</div><div>2</div><div>3</div>');5 const divs = await page.$$('div');6 const result = await page.mapRemainingChildren(divs[1], div => div.textContent());7 console.log(result);8}9test();10Your name to display (optional):11Your name to display (optional):

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Using AI Code Generation

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1const { mapRemainingChildren } = require('playwright/lib/server/dom.js');2const { ElementHandle, JSHandle } = require('playwright/lib/server/injected/injectedScript.js');3const { Page } = require('playwright/lib/server/page.js');4const { Frame } = require('playwright/lib/server/frames.js');5const { mapRemainingChildren } = require('playwright/lib/server/dom.js');6const { ElementHandle, JSHandle } = require('playwright/lib/server/injected/injectedScript.js');7const { Page } = require('playwright/lib/server/page.js');8const { Frame } = require('playwright/lib/server/frames.js');9const { mapRemainingChildren } = require('playwright/lib/server/dom.js');10const { ElementHandle, JSHandle } = require('playwright/lib/server/injected/injectedScript.js');11const { Page } = require('playwright/lib/server/page.js');12const { Frame } = require('playwright/lib/server/frames.js');13const { mapRemainingChildren } = require('playwright/lib/server/dom.js');14const { ElementHandle, JSHandle } = require('playwright/lib/server/injected/injectedScript.js');15const { Page } = require('playwright/lib/server/page.js');16const { Frame } = require('playwright/lib/server/frames.js');17const { mapRemainingChildren } = require('playwright/lib/server/dom.js');18const { ElementHandle, JSHandle } = require('playwright/lib/server/injected/injectedScript.js');19const { Page } = require('playwright/lib/server/page.js');20const { Frame } = require('playwright/lib/server/frames.js');21const { mapRemainingChildren } = require('playwright/lib/server/dom.js');22const { ElementHandle, JSHandle } = require('playwright/lib/server/injected/injectedScript.js');23const { Page } = require('playwright/lib/server/page.js');24const { Frame } = require('playwright/lib/server/frames.js');25const { mapRemainingChildren } = require('playwright

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Using AI Code Generation

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1const { mapRemainingChildren } = require('playwright/lib/server/dom.js');2const { parse } = require('playwright/lib/server/parser.js');3const { assert } = require('playwright/lib/server/utils.js');4`;5const root = parse(html);6const a = root.querySelector('.a');7const b = root.querySelector('.b');8const c = root.querySelector('.c');9const d = root.querySelector('.d');10const e = root.querySelector('.e');11const mappedChildren = mapRemainingChildren(a, root);12assert.deepEqual(mappedChildren, [b, c, d, e]);13const mappedChildren2 = mapRemainingChildren(b, root);14assert.deepEqual(mappedChildren2, [c, d, e]);15const mappedChildren3 = mapRemainingChildren(e, root);16assert.deepEqual(mappedChildren3, []);17const mappedChildren4 = mapRemainingChildren(c, root);18assert.deepEqual(mappedChildren4, [d, e]);19const mappedChildren5 = mapRemainingChildren(d, root);20assert.deepEqual(mappedChildren5, [e]);21const mappedChildren6 = mapRemainingChildren(e, root);22assert.deepEqual(mappedChildren6, []);23const mappedChildren7 = mapRemainingChildren(root, root);24assert.deepEqual(mappedChildren7, [a, b, c, d, e]);25const mappedChildren8 = mapRemainingChildren(root, a);26assert.deepEqual(mappedChildren8, [b, c, d, e]);27const mappedChildren9 = mapRemainingChildren(root, b);28assert.deepEqual(mappedChildren9, [c, d, e]);29const mappedChildren10 = mapRemainingChildren(root, c);30assert.deepEqual(mappedChildren10, [d, e]);31const mappedChildren11 = mapRemainingChildren(root, d);32assert.deepEqual(mappedChildren11, [e]);33const mappedChildren12 = mapRemainingChildren(root, e);34assert.deepEqual(mappedChildren12, []);35const mappedChildren13 = mapRemainingChildren(a, a);36assert.deepEqual(mappedChildren13, [b, c, d, e]);37const mappedChildren14 = mapRemainingChildren(b, b);38assert.deepEqual(mappedChildren14, [c, d, e]);39const mappedChildren15 = mapRemainingChildren(c, c

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Using AI Code Generation

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1const { mapRemainingChildren } = require('playwright/lib/client/selectorEngine');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 const searchInput = await page.$('input[name="q"]');8 const remainingChildren = await mapRemainingChildren(page, searchInput, 'div');9 console.log('Remaining children of searchInput: ', remainingChildren);10 await browser.close();11})();12 ElementHandle {13 _channel: JSHandleChannel {14 },15 },16 ElementHandle {17 _channel: JSHandleChannel {18 },19 },20 ElementHandle {21 _channel: JSHandleChannel {22 },23 },24 ElementHandle {25 _channel: JSHandleChannel {26 },27 },28 ElementHandle {29 _channel: JSHandleChannel {30 },

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Using AI Code Generation

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1import { mapRemainingChildren } from '@playwright/test/lib/runner';2export const test = mapRemainingChildren((page, { name }) => {3 test(name, async ({ page }) => {4 });5});6export default test;7import { test } from './test';8test.describe('Test', () => {9 test.describe('Test1', () => {10 test('Test 1', async ({ page }) => {11 });12 });13 test.describe('Test2', () => {14 test('Test 2', async ({ page }) => {15 });16 });17});18import { test } from './test.spec';19test.describe('Test', () => {20 test.describe('Test1', () => {21 test('Test 1', async ({ page }) => {22 });23 });24 test.describe('Test2', () => {25 test('Test 2', async ({ page }) => {26 });27 });28});29import { test } from './test.spec.spec';30test.describe('Test', () => {31 test.describe('Test1', () => {32 test('Test 1', async ({ page }) => {33 });34 });35 test.describe('Test2', () => {36 test('Test 2', async ({ page }) => {37 });38 });39});40import { test } from './test.spec.spec.spec';41test.describe('Test', () => {42 test.describe('Test1', () => {

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