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How to use prepareErrorStack method in Playwright Internal

Best JavaScript code snippet using playwright-internal

playwright-formatters.js

Source:playwright-formatters.js

...5const fs = require("fs");6const StackUtils = require("stack-utils");7const stackUtils = new StackUtils();8const kOutputSymbol = Symbol('output');9function prepareErrorStack(stack, file) {10    const lines = stack.split("\n");11    let firstStackLine = lines.findIndex((line) => line.startsWith("    at "));12    if (firstStackLine === -1) firstStackLine = lines.length;13    const message = lines.slice(0, firstStackLine).join("\n");14    const stackLines = lines.slice(firstStackLine);15    const position = file ? positionInFile(stackLines, file) : undefined;16    return {17        message,18        stackLines,19        position,20    };21}22function formatError(error, highlightCode, file) {23    const stack = error.stack;24    const tokens = [""];25    let positionInFile;26    if (stack) {27        const { message, stackLines, position } = prepareErrorStack(stack, file);28        positionInFile = position;29        tokens.push(message);30        const codeFrame = generateCodeFrame(31            {32                highlightCode,33            },34            file,35            position36        );37        if (codeFrame) {38            tokens.push("");39            tokens.push(codeFrame);40        }41        tokens.push("");42        tokens.push(dim(stackLines.join("\n")));43    } else if (error.message) {44        tokens.push(error.message);45    } else if (error.value) {46        tokens.push(error.value);47    }48    return {49        position: positionInFile,50        message: tokens.join("\n"),51    };52}53function generateCodeFrame(options, file, position) {54    if (!position || !file) return;55    const source = fs.readFileSync(file, "utf8");56    const codeFrame = (0, _codeFrame.codeFrameColumns)(57        source,58        {59            start: position,60        },61        options62    );63    return codeFrame;64}65function prepareErrorStack(stack, file) {66    const lines = stack.split("\n");67    let firstStackLine = lines.findIndex((line) => line.startsWith("    at "));68    if (firstStackLine === -1) firstStackLine = lines.length;69    const message = lines.slice(0, firstStackLine).join("\n");70    const stackLines = lines.slice(firstStackLine);71    const position = file ? positionInFile(stackLines, file) : undefined;72    return {73        message,74        stackLines,75        position,76    };77}78function positionInFile(stackLines, file) {79    // Stack will have /private/var/folders instead of /var/folders on Mac....

Using AI Code Generation

1const { prepareErrorStack } = require('playwright/lib/utils/stackTrace');2const { InternalError } = require('playwright/lib/utils/errors');3const { test } = require('playwright');4(async () => {5  const browser = await test.launch();6  const page = await browser.newPage();7  try {8    await page.waitForSelector('div');9  } catch (error) {10    console.log(prepareErrorStack(new InternalError(error.message, error.stack)));11  }12  await browser.close();13})();14    at Frame.waitForSelectorInPage (/home/ashish/Downloads/playwright-test/node_modules/playwright/lib/frames.js:1067:15)15    at Frame.waitForSelector (/home/ashish/Downloads/playwright-test/node_modules/playwright/lib/frames.js:1044:21)16    at Page.waitForSelector (/home/ashish/Downloads/playwright-test/node_modules/playwright/lib/page.js:2371:31)17    at main (/home/ashish/Downloads/playwright-test/test.js:11:30)18    at async Object.<anonymous> (/home/ashish/Downloads/playwright-test/test.js:17:1)19    at async Module._compile (internal/modules/cjs/loader.js:1137:30)20    at async Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)21    at async Module.load (internal/modules/cjs/loader.js:985:32)22    at async Function.Module._load (internal/modules/cjs/loader.js:878:14)23    at async Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)24const { prepareErrorStack } = require('playwright/lib/utils/stackTrace');25const { test } = require('playwright');26(async () => {27  const browser = await test.launch();28  const page = await browser.newPage();29  try {30    await page.waitForSelector('div');31  } catch (error) {32    console.log(prepareErrorStack(error));33  }34  await browser.close();35})();

Using AI Code Generation

1const { prepareErrorStack } = require('playwright/lib/utils/stackTrace');2const { InternalError } = require('playwright/lib/utils/errors');3const error = new InternalError('dummy error');4console.log(prepareErrorStack(error, __dirname));5const { TimeoutError } = require('playwright/lib/utils/errors');6const error = new TimeoutError('dummy error');7console.log(prepareErrorStack(error, __dirname));8const { Error } = require('playwright/lib/utils/errors');9const error = new Error('dummy error');10console.log(prepareErrorStack(error, __dirname));11const { Error } = require('playwright/lib/utils/errors');12const error = new Error('dummy error');13console.log(prepareErrorStack(error, __dirname));14const { TimeoutError } = require('playwright/lib/utils/errors');15const error = new TimeoutError('dummy error');16console.log(prepareErrorStack(error, __dirname));17const { prepareErrorStack } = require('playwright/lib/utils/stackTrace');18const { InternalError } = require('playwright/lib/utils/errors');19const error = new InternalError('dummy error');20console.log(prepareErrorStack(error, __dirname));21const { Error } = require('playwright/lib/utils/errors');22const error = new Error('dummy error');23console.log(prepareErrorStack(error, __dirname));24const { TimeoutError } = require('playwright/lib/utils/errors');25const error = new TimeoutError('dummy error');26console.log(prepareErrorStack(error, __dirname));27const { prepareErrorStack } = require('playwright/lib/utils/stackTrace');28const { InternalError } = require('playwright/lib/utils/errors');29const error = new InternalError('dummy error');30console.log(prepareErrorStack(error, __dirname));31const { Error } = require('playwright/lib/utils/errors');

Using AI Code Generation

1const { prepareErrorStack } = require('playwright/lib/utils/stackTrace');2const { PlaywrightError } = require('playwright/lib/utils/errors');3const error = new PlaywrightError('Error message');4console.log(prepareErrorStack(error));5    at Object.<anonymous> (/Users/username/test.js:6:13)6    at Module._compile (internal/modules/cjs/loader.js:999:30)7    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)8    at Module.load (internal/modules/cjs/loader.js:863:32)9    at Function.Module._load (internal/modules/cjs/loader.js:708:14)10    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:60:12)

Using AI Code Generation

1const { prepareErrorStack } = require('@playwright/test/lib/utils/stackTrace');2const stack = prepareErrorStack(new Error('test error'));3console.log(stack);4    at Object.<anonymous> (/Users/abc/test.js:4:26)5    at Module._compile (internal/modules/cjs/loader.js:1200:30)6    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1220:10)7    at Module.load (internal/modules/cjs/loader.js:1050:32)8    at Function.Module._load (internal/modules/cjs/loader.js:938:14)9    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)10const stack = new Error('test error').stack;11console.log(stack);12    at Object.<anonymous> (/Users/abc/test.js:2:16)13    at Module._compile (internal/modules/cjs/loader.js:1200:30)14    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1220:10)15    at Module.load (internal/modules/cjs/loader.js:1050:32)16    at Function.Module._load (internal/modules/cjs/loader.js:938:14)17    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)18const stack = new Error('test error').stack;19console.log(stack);20    at Object.<anonymous> (/Users/abc/test.js:2:16)21    at Module._compile (internal/modules/cjs/loader.js:1200:30)22    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1220:10)23    at Module.load (internal/modules/cjs/loader.js:1050:32)24    at Function.Module._load (internal/modules/cjs/loader

Using AI Code Generation

1const { InternalError } = require('@playwright/test/lib/utils/stackTrace');2const err = new InternalError('test error');3console.log(err.prepareErrorStack());4const { Error } = require('@playwright/test');5const err = new Error('test error');6console.log(err.prepareErrorStack());7    at Object.<anonymous> (/Users/username/playwright-test/test.js:4:19)8    at Module._compile (node:internal/modules/cjs/loader:1108:14)9    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1137:10)10    at Module.load (node:internal/modules/cjs/loader:989:32)11    at Function.Module._load (node:internal/modules/cjs/loader:829:14)12    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12)13    at Object.<anonymous> (/Users/username/playwright-test/test.js:10:19)14    at Module._compile (node:internal/modules/cjs/loader:1108:14)15    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1137:10)16    at Module.load (node:internal/modules/cjs/loader:989:32)17    at Function.Module._load (node:internal/modules/cjs/loader:829:14)18    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12)

Using AI Code Generation

1const { prepareErrorStack } = require('playwright/lib/utils/stackTrace');2const error = new Error('Test Error');3const stack = prepareErrorStack(error);4console.log(stack);5    at Object.<anonymous> (/Users/skonduru/Documents/playwright-test/test.js:4:9)6    at Module._compile (internal/modules/cjs/loader.js:1137:30)7    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)8    at Module.load (internal/modules/cjs/loader.js:985:32)9    at Function.Module._load (internal/modules/cjs/loader.js:878:14)10    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)

Using AI Code Generation

1const { prepareErrorStack } = require('playwright/lib/utils/stackTrace');2const error = new Error('My Error');3error.stack = prepareErrorStack(error.stack);4throw error;5    at Object.<anonymous> (/Users/****/playwright-test/test.js:3:9)6    at Module._compile (internal/modules/cjs/loader.js:1156:30)7    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1176:10)8    at Module.load (internal/modules/cjs/loader.js:1002:32)9    at Function.Module._load (internal/modules/cjs/loader.js:901:14)10    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)11const { test, expect } = require('@playwright/test');12test('should throw error', async ({ page }) => {13  const title = await page.title();14  expect(title).toBe('Playwright');15});16      5 |   const title = await page.title();17      6 |   expect(title).toBe('Playwright');18    > 7 | });19    at Object.<anonymous> (playwright-test/test.js:7:5)20    at Object.<anonymous> (playwright-test/test.js:1:1)21const { test, expect } = require('@playwright/test');22test('should throw error', async ({ page }) => {

Using AI Code Generation

1const { prepareErrorStack } = require('playwright/lib/server/stackTrace');2const error = new Error('My error');3const stack = prepareErrorStack(error);4console.log(stack);5    at Object.<anonymous> (/Users/username/playwright-test/test.js:9:9)6    at Module._compile (internal/modules/cjs/loader.js:999:30)7    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)8    at Module.load (internal/modules/cjs/loader.js:863:32)9    at Function.Module._load (internal/modules/cjs/loader.js:708:14)10    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:60:12)

Playwright tutorial

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