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How to use createArrayExpression method in Playwright Internal

Best JavaScript code snippet using playwright-internal

js.js

Source:js.js

...60                        };61                        if (parent.type == 'CallExpression' && parent.callee == node) {62                            identifier = '$corrosionCall$m';63                            nodeToRewrite = parent;64                            args.push(this.createArrayExpression(...parent.arguments))65                        };66                        if (parent.type == 'UpdateExpression') {67                            identifier = '$corrosionSet$m';68                            nodeToRewrite = parent;69                            args.push(this.createLiteral(null), this.createLiteral(parent.operator));70                        };71                        Object.assign(nodeToRewrite, this.createCallExpression({ type: 'Identifier', name: identifier, }, args));72                    };73                },74            },75            {76                type: 'Identifier',77                handler: (node, parent) => {78                    if (parent.type == 'MemberExpression' && parent.property == node) return; // window.location;79                    if (parent.type == 'LabeledStatement') return; // { location: null, };80                    if (parent.type == 'VariableDeclarator' && parent.id == node) return;81                    if (parent.type == 'Property' && parent.key == node) return;82                    if (parent.type == 'MethodDefinition') return;83                    if (parent.type == 'ClassDeclaration') return;84                    if (parent.type == 'RestElement') return;85                    if (parent.type == 'ExportSpecifier') return;86                    if (parent.type == 'ImportSpecifier') return;87                    if ((parent.type == 'FunctionDeclaration' || parent.type == 'FunctionExpression' || parent.type == 'ArrowFunctionExpression') && parent.params.includes(node)) return;88                    if ((parent.type == 'FunctionDeclaration' || parent.type == 'FunctionExpression') && parent.id == node) return;89                    if (parent.type == 'AssignmentPattern' && parent.left == node) return;90                    if (!this.rewrite.includes(node.name)) return;91                    if (node.preventRewrite) return;92                    let identifier = '$corrosionGet$';93                    let nodeToRewrite = node;94                    const args = [95                        this.createIdentifier(node.name, true),96                    ];97                    if (parent.type == 'AssignmentExpression' && parent.left == node) {98                        identifier = '$corrosionSet$';99                        nodeToRewrite = parent;100                        args.push(parent.right);101                        args.push(this.createLiteral(parent.operator));102                    };103                    Object.assign(nodeToRewrite, this.createCallExpression({ type: 'Identifier', name: identifier }, args));104                },105            },106            {107                type: 'ImportDeclaration',108                handler: (node, parent, url) => {109                    if (node.source.type != 'Literal' || !url) return;110                    node.source = this.createLiteral(ctx.url.wrap(node.source.value, { base: url, }));      111                },112            },113            {114                type: 'ImportExpression',115                handler: (node, parent) => {116                    node.source = this.createCallExpression(this.createMemberExpression(this.createMemberExpression(this.createIdentifier('$corrosion'), this.createIdentifier('url')), this.createIdentifier('wrap')), [ 117                        node.source,118                        this.createMemberExpression(this.createIdentifier('$corrosion'), this.createIdentifier('meta')),119                    ]);120                },121            },  122        ];123        this.ctx = ctx;124    };125    process(source, url) {126        try {127            const ast = parse(source, this.parseOptions);128            this.iterate(ast, (node, parent) => {129                const fn = this.map.find(entry => entry.type == (node || {}).type);130                if (fn) fn.handler(node, parent, url);131            });132            return (url ? this.createHead(url) : '') + generate(ast, this.generationOptions);133        } catch(e) {134            return source;135        };136    };137    createHead(url) {138        return `139        if (!self.$corrosion && self.importScripts) {140            importScripts(location.origin + '${this.ctx.prefix}index.js');141            self.$corrosion = new Corrosion({ url: '${url}', codec: '${this.ctx.config.codec || 'plain'}', serviceWorker: true,  window: self, prefix: '${this.ctx.prefix || '/service/'}', ws: ${this.ctx.config.ws || true}, cookies: ${this.ctx.config.cookies || false}, title: '${this.ctx.config.title}', }); $corrosion.init();142        };\n`;143    };144    iterate(ast, handler) {145        if (typeof ast != 'object' || !handler) return;146        walk(ast, null, handler);147        function walk(node, parent, handler) {148            if (typeof node != 'object' || !handler) return;149            handler(node, parent, handler);150            for (const child in node) {151                if (Array.isArray(node[child])) {152                    node[child].forEach(entry => walk(entry, node, handler));153                } else {154                    walk(node[child], node, handler);155                };156            };157        };158    };159    createCallExpression(callee, args) {160        return { type: 'CallExpression', callee, arguments: args, optional: false, };161    };162    createArrayExpression(...elements) {163        return {164            type: 'ArrayExpression',165            elements,166        };167    };168    createMemberExpression(object, property) {169        return {170            type: 'MemberExpression',171            object,172            property,173        };174    };175    createLiteral(value) {176        return {...

ast.js

Source:ast.js

...5    source: '',6    start: { line: 1, column: 1, offset: 0 },7    end: { line: 1, column: 1, offset: 0 }8};9function createArrayExpression(elements, loc) {10    if (loc === void 0) { loc = exports.locStub; }11    return {12        type: 16,13        loc: loc,14        elements: elements15    };16}17exports.createArrayExpression = createArrayExpression;18function createObjectExpression(properties, loc) {19    if (loc === void 0) { loc = exports.locStub; }20    return {21        type: 14,22        loc: loc,23        properties: properties...

transform.js

Source:transform.js

...36    type: 'Identifier',37    name38  }39}40function createArrayExpression(elements) {41  return {42    type: 'ArrayExpression',43    elements44  }45}46function createCallExpression(callee, ...args) {47  return {48    type: 'CallExpression',49    callee: createIdentifier(callee),50    args51  }52}53function transformText(node) {54  if (node.type !== 'Text') {55    return56  }57  58  node.jsNode = createStringLiteral(node.content)59}60function transformElement(node) {61  62  return () => {63    if (node.type !== 'Element') {64      return65    }66    67    const callExp = createCallExpression('h', [68      createStringLiteral(node.tag)69    ])70    node.children.length === 171      ? callExp.args.push(node.children[0].jsNode)72      : callExp.args.push(73        createArrayExpression(node.children.map(c => c.jsNode))74      )75    node.jsNode = callExp76  }77}78function transformRoot(node) {79  return () => {80    if (node.type !== 'Root') {81      return82    }83    84    const vnodeJSAST = node.children[0].jsNode85    86    node.jsNode = {87      type: 'FunctionDecl',...

node-builder.js

Source:node-builder.js

1const { Syntax } = require("./esotope");2function createCallExpression(callee, args) {3    return { type: Syntax.CallExpression, callee, arguments: args, optional: false, };4};5function createArrayExpression(...elements) {6    return {7        type: Syntax.ArrayExpression,8        elements,9    };10};11function createMemberExpression(object, property) {12    return {13        type: Syntax.MemberExpression,14        object,15        property,16    };17};18function createLiteral(value) {19    return {...

compiler.js

Source:compiler.js

...26  // override root codegenNode27  ast.codegenNode =28    ast.children.length === 129      ? ast.children[0]30      : createArrayExpression(ast.children)31  // clear out helpers as we are not using any32  ast.helpers = []33  return generate(ast, { mode: 'module', sourceMap: false })34    .code.trim()35    .replace(36      /^export function render\(_ctx, _cache\)/,37      'export function render()'38    )39}40/**41 *42 * @param {import('@vue/compiler-core').ElementNode} node43 * @param {import('@vue/compiler-core').TransformContext} context44 */45function transformElement(node, context) {46  if (node.type !== 1) return // Not an element, return.47  return () => {48    const props = createObjectExpression(49      node.props.map(prop =>50        createObjectProperty(51          prop.name,52          prop.value ? createSimpleExpression(prop.value.content, true) : 'true'53        )54      )55    )56    node.codegenNode = createCallExpression('h', [57      createSimpleExpression(node.tag, true),58      props,59      createArrayExpression(node.children),60    ])61  }...

ConditionalExpressionHandler.js

Source:ConditionalExpressionHandler.js

...14  }15  const consequentStyles = expression.consequent.value.split(' ').filter((s) => s !== '');16  const alternateStyles = expression.alternate.value.split(' ').filter((s) => s !== '');17  stylesCollector.push(...consequentStyles, ...alternateStyles);18  expression.consequent = createArrayExpression(consequentStyles);19  expression.alternate = createArrayExpression(alternateStyles);20  path.replaceWith(21    t.jsxAttribute(22      t.jsxIdentifier('className'),23      t.JSXExpressionContainer(24        t.callExpression(t.identifier(stylesVarName), [t.SpreadElement(expression)]),25      ),26    ),27  );28}29function createArrayExpression(styles: string[]) {30  return t.ArrayExpression(styles.map((s) => t.StringLiteral(s)));...

utils.js

Source:utils.js

...14    }15  });16  return result;17}18function createArrayExpression(content) {19  var ast = esprima.parseScript('var a = ' + content)20  var result;21  estraverse.traverse(ast, {22    enter: function (node, parent) {23      if (node.type == 'ObjectExpression' && parent) {24        if (parent.id && parent.id.name === 'a') {25          result = node;26          estraverse.VisitorOption.Break;27        }28      }29    }30  });31  return result;32}...

method-call.js

Source:method-call.js

...6        if (node.callee.type == Syntax.MemberExpression && node.callee.computed && node.callee.object.type != Syntax.Super && node.callee.property.type != Syntax.Literal) return true;7        return false;8    },9    run: node => { 10        Object.assign(node, createCallExpression(createIdentifier('__call$'), [ node.callee.object, node.callee.property, createArrayExpression(...node.arguments) ]));11    },...

Using AI Code Generation

1const { createArrayExpression } = require('@playwright/test');2const { createObjectExpression } = require('@playwright/test');3const { createRegExpLiteral } = require('@playwright/test');4const { createStringLiteral } = require('@playwright/test');5const { createTemplateLiteral } = require('@playwright/test');6const { createTypeLiteral } = require('@playwright/test');7const { createTypeReference } = require('@playwright/test');8const { createUnionType } = require('@playwright/test');9const { createVoidType } = require('@playwright/test');10const { createFunctionDeclaration } = require('@playwright/test');11const { createFunctionExpression } = require('@playwright/test');12const { createArrowFunction } = require('@playwright/test');13const { createMethodDeclaration } = require('@playwright/test');14const { createObjectMethod } = require('@playwright/test');15const { createObjectProperty } = require('@playwright/test');16const { createClassDeclaration } = require('@playwright/test');17const { createClassExpression } = require('@playwright/test');18const { createVariableDeclaration } = require('@playwright/test');19const { createVariableDeclarator } =

Using AI Code Generation

1const playwright = require('playwright');2const playwrightInternal = require('playwright/lib/server/playwright');3const createArrayExpression = playwrightInternal.createArrayExpression;4async function main() {5  const browser = await playwright.chromium.launch();6  const page = await browser.newPage();7  const handle = await page.evaluateHandle(createArrayExpression, ['a', 'b', 'c']);8  console.log(await handle.jsonValue());9  await browser.close();10}11main();

Using AI Code Generation

1const { createArrayExpression } = require('playwright-core/lib/server/common/javascript');2const arrayExpression = createArrayExpression(['a', 'b', 'c']);3console.log(arrayExpression);4{ type: 'ArrayExpression', elements: [ { type: 'Literal', value: 'a' }, { type: 'Literal', value: 'b' }, { type: 'Literal', value: 'c' } ] }5const { createObjectExpression } = require('playwright-core/lib/server/common/javascript');6const objectExpression = createObjectExpression([{key: 'a', value: 'b'}, {key: 'c', value: 'd'}]);7console.log(objectExpression);8{ type: 'ObjectExpression', properties: [ { type: 'Property', key: { type: 'Literal', value: 'a' }, value: { type: 'Literal', value: 'b' }, kind: 'init', method: false, shorthand: false }, { type: 'Property', key: { type: 'Literal', value: 'c' }, value: { type: 'Literal', value: 'd' }, kind: 'init', method: false, shorthand: false } ] }9const { createProperty } = require('playwright-core/lib/server/common/javascript');10const property = createProperty('a', 'b');11console.log(property);12{ type: 'Property', key: { type: 'Literal', value: 'a' }, value: { type: 'Literal', value: 'b' }, kind: 'init', method: false, shorthand: false }13const { createRegExpLiteral } = require('playwright-core/lib/server/common/javascript');14const regExpLiteral = createRegExpLiteral('a');15console.log(regExpLiteral);16{ type: 'Literal', value: 'a', regex: { pattern: 'a', flags: '' } }

Using AI Code Generation

1const { createArrayExpression } = require('playwright/lib/server/supplements/recorder/recorderSupplement');2const arrayExpression = createArrayExpression([3  {4  },5  {6  },7]);8console.log(arrayExpression);9const { createObjectExpression } = require('playwright/lib/server/supplements/recorder/recorderSupplement');10const objectExpression = createObjectExpression([11  {12    key: {13    },14    value: {15    },16  },17  {18    key: {19    },20    value: {21    },22  },23]);24console.log(objectExpression);25const { createLiteral } = require('playwright/lib/server/supplements/recorder/recorderSupplement');26const literalExpression = createLiteral('hello');27console.log(literalExpression);28const { createIdentifier } = require('playwright/lib/server/supplements/recorder/recorderSupplement');29const identifierExpression = createIdentifier('hello');30console.log(identifierExpression);31const { createProperty } = require('playwright/lib/server/supplements/recorder/recorderSupplement');32const propertyExpression = createProperty(33  {34  },35  {

Using AI Code Generation

1const { createArrayExpression } = require('playwright-core/lib/server/supplements/recorder/javascript');2const arrayExpression = createArrayExpression(['a', 'b', 'c']);3console.log(arrayExpression);4const { createStringLiteral } = require('playwright-core/lib/server/supplements/recorder/javascript');5const stringLiteral = createStringLiteral('hello');6console.log(stringLiteral);7const { createIdentifier } = require('playwright-core/lib/server/supplements/recorder/javascript');8const identifier = createIdentifier('hello');9console.log(identifier);10const { createMemberExpression } = require('playwright-core/lib/server/supplements/recorder/javascript');11const memberExpression = createMemberExpression('hello', 'world');12console.log(memberExpression);13const { createCallExpression } = require('playwright-core/lib/server/supplements/recorder/javascript');14const callExpression = createCallExpression('hello', 'world');15console.log(callExpression);16const { createPropertyAssignment } = require('playwright-core/lib/server/supplements/recorder/javascript');

Using AI Code Generation

1const { createArrayExpression } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');2const arr = createArrayExpression([1, 2, 3]);3console.log(arr);4const arr2 = createArrayExpression([1, 2, 3], { forceSingleLine: true });5console.log(arr2);6const arr3 = createArrayExpression([1, 2, 3], { forceSingleLine: false });7console.log(arr3);8const arr4 = createArrayExpression([1, 2, 3], { maxLen: 2 });9console.log(arr4);10const arr5 = createArrayExpression([1, 2, 3], { maxLen: 3 });11console.log(arr5);12const arr6 = createArrayExpression([1, 2, 3], { maxLen: 4 });13console.log(arr6);14const arr7 = createArrayExpression([1, 2, 3], { maxLen: 5 });15console.log(arr7);

StackOverFlow community discussions

Questions

Discussion

Jest + Playwright - Test callbacks of event-based DOM library

firefox browser does not start in playwright

Running Playwright in Azure Function

Is it possible to get the selector from a locator object in playwright?

How to run a list of test suites in a single file concurrently in jest?

This question is quite close to a "need more focus" question. But let's try to give it some focus:

Does Playwright has access to the cPicker object on the page? Does it has access to the window object?

Yes, you can access both cPicker and the window object inside an evaluate call.

Should I trigger the events from the HTML file itself, and in the callbacks, print in the DOM the result, in some dummy-element, and then infer from that dummy element text that the callbacks fired?

Exactly, or you can assign values to a javascript variable:

const cPicker = new ColorPicker({
  onClickOutside(e){
  },
  onInput(color){
    window['color'] = color;
  },
  onChange(color){
    window['result'] = color;
  }
})

And then

it('Should call all callbacks with correct arguments', async() => {
    await page.goto(`http://localhost:5000/tests/visual/basic.html`, {waitUntil:'load'})

    // Wait until the next frame
    await page.evaluate(() => new Promise(requestAnimationFrame))

    // Act
   
    // Assert
    const result = await page.evaluate(() => window['color']);
    // Check the value
})

https://stackoverflow.com/questions/65477895/jest-playwright-test-callbacks-of-event-based-dom-library

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

Well this is one way, but not sure if it will work for all possible locators!.

// Get a selector from a playwright locator
import { Locator } from "@playwright/test";
export function extractSelector(locator: Locator) {
    const selector = locator.toString();
    const parts = selector.split("@");
    if (parts.length !== 2) { throw Error("extractSelector: susupect that this is not a locator"); }
    if (parts[0] !== "Locator") { throw Error("extractSelector: did not find locator"); }
    return parts[1];
}

https://stackoverflow.com/questions/72044959/is-it-possible-to-get-the-selector-from-a-locator-object-in-playwright

Assuming you are not running test with the --runinband flag, the simple answer is yes but it depends ????

There is a pretty comprehensive GitHub issue jest#6957 that explains certain cases of when tests are run concurrently or in parallel. But it seems to depend on a lot of edge cases where jest tries its best to determine the fastest way to run the tests given the circumstances.

To my knowledge there is no way to force jest to run in parallel.

Aside

Have you considered using playwright instead of puppeteer with jest? Playwright has their own internally built testing library called @playwright/test that is used in place of jest with a similar API. This library allows for explicitly defining test groups in a single file to run in parallel (i.e. test.describe.parallel) or serially (i.e. test.describe.serial). Or even to run all tests in parallel via a config option.

// parallel
test.describe.parallel('group', () => {
  test('runs in parallel 1', async ({ page }) => {});
  test('runs in parallel 2', async ({ page }) => {});
});

// serial
test.describe.serial('group', () => {
  test('runs first', async ({ page }) => {});
  test('runs second', async ({ page }) => {});
});

https://stackoverflow.com/questions/73497773/how-to-run-a-list-of-test-suites-in-a-single-file-concurrently-in-jest

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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.