Best JavaScript code snippet using wpt
usb.https.window.js
Source: usb.https.window.js 
...13      assert_equals(error.code, DOMException.SECURITY_ERR);14    });15}, 'requestDevice rejects when called without a user gesture');16usb_test(() => {17  return callWithTrustedClick(() => navigator.usb.requestDevice({ filters: [] })18    .then(device => {19      assert_unreachable('requestDevice should reject when no device selected');20    })21    .catch(error => {22      assert_equals(error.code, DOMException.NOT_FOUND_ERR);23    })24  );25}, 'requestDevice rejects when no device is chosen');26usb_test(() => {27  return getFakeDevice().then(({ device, fakeDevice }) => {28    navigator.usb.test.onrequestdevice = event => {29      navigator.usb.test.onrequestdevice = undefined;30      event.respondWith(fakeDevice);31    };32    return callWithTrustedClick(() => {33      return navigator.usb.requestDevice({ filters: [] }).then(chosenDevice => {34        assert_equals(chosenDevice, device);35      });36    });37  });38}, 'requestDevice returns the device chosen by the user');39usb_test(() => {40  return getFakeDevice().then(({ device, fakeDevice }) => {41    navigator.usb.test.onrequestdevice = event => {42      navigator.usb.test.onrequestdevice = undefined;43      event.respondWith(fakeDevice);44    };45    return callWithTrustedClick(() => {46      return navigator.usb.requestDevice({ filters: [] }).then(chosenDevice => {47        assert_equals(chosenDevice, device);48        return navigator.usb.getDevices().then(devices => {49          assert_equals(devices.length, 1);50          assert_equals(devices[0], chosenDevice);51        });52      });53    });54  });55}, 'getDevices returns the same object as requestDevice');56usb_test(() => {57  const expectedFilters = [58    { vendorId: 1234, classCode: 0xFF, serialNumber: "123ABC" },59    { vendorId: 5678, productId: 0xF00F },60    { vendorId: 9012, classCode: 0xFF, subclassCode: 0xEE, protocolCode: 0xDD },61  ];62  navigator.usb.test.onrequestdevice = event => {63    navigator.usb.test.onrequestdevice = undefined;64    assert_equals(event.filters.length, expectedFilters.length);65    for (var i = 0; i < event.filters.length; ++i) {66      assert_object_equals(event.filters[i], expectedFilters[i]);67    }68    event.respondWith(null);69  };70  return callWithTrustedClick(() => {71    return navigator.usb.requestDevice({ filters: expectedFilters })72      .then(device => {73        assert_unreached(74            'requestDevice should reject because no device selected');75      })76      .catch(error => {77        assert_equals(error.code, DOMException.NOT_FOUND_ERR);78      });79  });80}, 'filters are sent correctly');81usb_test(async () => {82  const badFilters = [83    { productId: 1234 },     // productId requires vendorId84    { subclassCode: 5678 },  // subclassCode requires classCode85    { protocolCode: 9012 },  // protocolCode requires subclassCode86  ];87  for (const filter of badFilters) {88    await callWithTrustedClick(async () => {89      try {90        await navigator.usb.requestDevice({ filters: [filter] });91        assert_unreached(92            'requestDevice should reject because of invalid filters');93      } catch (error) {94        assert_equals(error.name, 'TypeError');95      }96    });97  }98}, 'requestDevice rejects on invalid filters');99usb_test(() => {100  return getFakeDevice().then(({ device, fakeDevice }) => {101    navigator.usb.test.onrequestdevice = event => {102      event.respondWith(fakeDevice);103    };104    return callWithTrustedClick(() => {105      let first = navigator.usb.requestDevice({ filters: [] });106      let second = navigator.usb.requestDevice({ filters: [] });107      return Promise.all([108        first.then(chosenDevice => {109          assert_equals(chosenDevice, device);110        }),111        second.then(chosenDevice => {112          assert_equals(chosenDevice, device);113        })114      ]);115    });116  });...Using AI Code Generation
1var wpt = require('webpagetest');2var wpt = new WebPageTest('www.webpagetest.org');3var options = {4};5wpt.runTest(options, function(err, data) {6  if (err) {7    console.log('Error: ' + err);8  } else {9    console.log('Test Results: ' + JSON.stringify(data));10    wpt.getTestResults(data.data.testId, function(err, data) {11      if (err) {12        console.log('Error: ' + err);13      } else {14        console.log('Test Results: ' + JSON.stringify(data));15      }16    });17  }18});Using AI Code Generation
1var wpt = require('webpagetest');2var options = {key: 'A.12345678901234567890123456789012'};3var wpt = new WebPageTest('www.webpagetest.org', options.key);4  if (err) return console.error(err);5  console.log('Test status:', data.statusText);6  var testId = data.data.testId;7  wpt.getTestResults(testId, function(err, data) {8    if (err) return console.error(err);9    console.log('SpeedIndex:', data.data.average.firstView.SpeedIndex);10  });11  wpt.callWithTrustedClick(testId, function(err, data) {12    if (err) return console.error(err);13    console.log('SpeedIndex:', data.data.average.firstView.SpeedIndex);14  });15});16var wpt = require('webpagetest');17var options = {key: 'A.12345678901234567890123456789012'};18var wpt = new WebPageTest('www.webpagetest.org', options.key);19  if (err) return console.error(err);20  console.log('Test status:', data.statusText);21  var testId = data.data.testId;22  wpt.getTestResults(testId, function(err, data) {23    if (err) return console.error(err);24    console.log('SpeedIndex:', data.data.average.firstView.SpeedIndex);25  });26  wpt.callWithTrustedClick(testId, function(err, data) {27    if (err) return console.error(err);28    console.log('SpeedIndex:', data.data.average.firstView.SpeedIndex);29  });30});31var wpt = require('webpagetest');32var options = {key: 'A.12345678901234567890123456789012'};33var wpt = new WebPageTest('www.webpagetest.org', options.key);Using AI Code Generation
1var wpt = require('webpagetest');2var wpt = new WebPageTest('www.webpagetest.org', 'A.8fb8f8f8f8f8f8f8f8f8f8f8f8f8f8f8');3    if (err) return console.log(err);4    console.log('Test status:', data.statusText);5    if (data.statusCode == 200) {6        console.log('Test completed, results available at:', data.data.summary);7    }8});9    if (err) return console.log(err);10    console.log('Test status:', data.statusText);11    if (data.statusCode == 200) {12        console.log('Test completed, results available at:', data.data.summary);13    }14});15    if (err) return console.log(err);16    console.log('Test status:', data.statusText);17    if (data.statusCode == 200) {18        console.log('Test completed, results available at:', data.data.summary);19    }20});21    if (err) return console.log(err);22    console.log('Test status:', data.statusText);23    if (data.statusCode == 200) {24        console.log('Test completed, results available at:', data.data.summary);25    }26});27    if (err) return console.log(err);28    console.log('Test status:', data.statusText);29    if (data.statusCode == 200) {30        console.log('Test completed, results available at:', data.data.summary);31    }32});33    if (err) return console.log(err);34    console.log('Test status:', data.statusText);35    if (dataCheck out the latest blogs from LambdaTest on this topic:
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