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How to use newPromiseCapability method in wpt

Best JavaScript code snippet using wpt

es.promise.js

Source:es.promise.js

1import { DESCRIPTORS, GLOBAL, PROTO, STRICT } from '../helpers/constants';2import { createIterable } from '../helpers/helpers';3import { Promise, Symbol } from 'core-js-pure';4import getIteratorMethod from 'core-js-pure/features/get-iterator-method';5import { setPrototypeOf, create } from 'core-js-pure/features/object';6import bind from 'core-js-pure/features/function/bind';7QUnit.test('Promise', assert => {8  assert.isFunction(Promise);9  assert.throws(() => {10    Promise();11  }, 'throws w/o `new`');12  new Promise(function (resolve, reject) {13    assert.isFunction(resolve, 'resolver is function');14    assert.isFunction(reject, 'rejector is function');15    if (STRICT) assert.same(this, undefined, 'correct executor context');16  });17});18if (DESCRIPTORS) QUnit.test('Promise operations order', assert => {19  let resolve, resolve2;20  assert.expect(1);21  const EXPECTED_ORDER = 'DEHAFGBC';22  const async = assert.async();23  let result = '';24  const promise1 = new Promise(r => {25    resolve = r;26  });27  resolve({28    then() {29      result += 'A';30      throw Error();31    },32  });33  promise1.catch(() => {34    result += 'B';35  });36  promise1.catch(() => {37    result += 'C';38    assert.same(result, EXPECTED_ORDER);39    async();40  });41  const promise2 = new Promise(r => {42    resolve2 = r;43  });44  resolve2(Object.defineProperty({}, 'then', {45    get() {46      result += 'D';47      throw Error();48    },49  }));50  result += 'E';51  promise2.catch(() => {52    result += 'F';53  });54  promise2.catch(() => {55    result += 'G';56  });57  result += 'H';58  setTimeout(() => {59    if (!~result.indexOf('C')) {60      assert.same(result, EXPECTED_ORDER);61      async();62    }63  }, 1e3);64});65QUnit.test('Promise#then', assert => {66  assert.isFunction(Promise.prototype.then);67  assert.nonEnumerable(Promise.prototype, 'then');68  let promise = new Promise(resolve => {69    resolve(42);70  });71  let FakePromise1 = promise.constructor = function (executor) {72    executor(() => { /* empty */ }, () => { /* empty */ });73  };74  const FakePromise2 = FakePromise1[Symbol.species] = function (executor) {75    executor(() => { /* empty */ }, () => { /* empty */ });76  };77  assert.ok(promise.then(() => { /* empty */ }) instanceof FakePromise2, 'subclassing, @@species pattern');78  promise = new Promise(resolve => {79    resolve(42);80  });81  promise.constructor = FakePromise1 = function (executor) {82    executor(() => { /* empty */ }, () => { /* empty */ });83  };84  assert.ok(promise.then(() => { /* empty */ }) instanceof Promise, 'subclassing, incorrect `this` pattern');85  promise = new Promise(resolve => {86    resolve(42);87  });88  promise.constructor = FakePromise1 = function (executor) {89    executor(() => { /* empty */ }, () => { /* empty */ });90  };91  FakePromise1[Symbol.species] = function () { /* empty */ };92  assert.throws(() => {93    promise.then(() => { /* empty */ });94  }, 'NewPromiseCapability validations, #1');95  FakePromise1[Symbol.species] = function (executor) {96    executor(null, () => { /* empty */ });97  };98  assert.throws(() => {99    promise.then(() => { /* empty */ });100  }, 'NewPromiseCapability validations, #2');101  FakePromise1[Symbol.species] = function (executor) {102    executor(() => { /* empty */ }, null);103  };104  assert.throws(() => {105    promise.then(() => { /* empty */ });106  }, 'NewPromiseCapability validations, #3');107});108QUnit.test('Promise#catch', assert => {109  assert.isFunction(Promise.prototype.catch);110  assert.nonEnumerable(Promise.prototype, 'catch');111  let promise = new Promise(resolve => {112    resolve(42);113  });114  let FakePromise1 = promise.constructor = function (executor) {115    executor(() => { /* empty */ }, () => { /* empty */ });116  };117  const FakePromise2 = FakePromise1[Symbol.species] = function (executor) {118    executor(() => { /* empty */ }, () => { /* empty */ });119  };120  assert.ok(promise.catch(() => { /* empty */ }) instanceof FakePromise2, 'subclassing, @@species pattern');121  promise = new Promise(resolve => {122    resolve(42);123  });124  promise.constructor = FakePromise1 = function (executor) {125    executor(() => { /* empty */ }, () => { /* empty */ });126  };127  assert.ok(promise.catch(() => { /* empty */ }) instanceof Promise, 'subclassing, incorrect `this` pattern');128  promise = new Promise(resolve => {129    resolve(42);130  });131  promise.constructor = FakePromise1 = function (executor) {132    executor(() => { /* empty */ }, () => { /* empty */ });133  };134  FakePromise1[Symbol.species] = function () { /* empty */ };135  assert.throws(() => {136    promise.catch(() => { /* empty */ });137  }, 'NewPromiseCapability validations, #1');138  FakePromise1[Symbol.species] = function (executor) {139    executor(null, () => { /* empty */ });140  };141  assert.throws(() => {142    promise.catch(() => { /* empty */ });143  }, 'NewPromiseCapability validations, #2');144  FakePromise1[Symbol.species] = function (executor) {145    executor(() => { /* empty */ }, null);146  };147  assert.throws(() => {148    promise.catch(() => { /* empty */ });149  }, 'NewPromiseCapability validations, #3');150  assert.same(Promise.prototype.catch.call({151    then(x, y) {152      return y;153    },154  }, 42), 42, 'calling `.then`');155});156QUnit.test('Promise#@@toStringTag', assert => {157  assert.ok(Promise.prototype[Symbol.toStringTag] === 'Promise', 'Promise::@@toStringTag is `Promise`');158  assert.strictEqual(String(new Promise(() => { /* empty */ })), '[object Promise]', 'correct stringification');159});160QUnit.test('Promise.all', assert => {161  const { all, resolve } = Promise;162  assert.isFunction(all);163  assert.arity(all, 1);164  const iterable = createIterable([1, 2, 3]);165  Promise.all(iterable).catch(() => { /* empty */ });166  assert.ok(iterable.received, 'works with iterables: iterator received');167  assert.ok(iterable.called, 'works with iterables: next called');168  const array = [];169  let done = false;170  array['@@iterator'] = undefined;171  array[Symbol.iterator] = function () {172    done = true;173    return getIteratorMethod([]).call(this);174  };175  Promise.all(array);176  assert.ok(done);177  assert.throws(() => {178    all.call(null, []).catch(() => { /* empty */ });179  }, TypeError, 'throws without context');180  done = false;181  try {182    Promise.resolve = function () {183      throw new Error();184    };185    Promise.all(createIterable([1, 2, 3], {186      return() {187        done = true;188      },189    })).catch(() => { /* empty */ });190  } catch (error) { /* empty */ }191  Promise.resolve = resolve;192  assert.ok(done, 'iteration closing');193  let FakePromise1 = function (executor) {194    executor(() => { /* empty */ }, () => { /* empty */ });195  };196  let FakePromise2 = FakePromise1[Symbol.species] = function (executor) {197    executor(() => { /* empty */ }, () => { /* empty */ });198  };199  FakePromise1.resolve = FakePromise2.resolve = bind(resolve, Promise);200  assert.ok(all.call(FakePromise1, [1, 2, 3]) instanceof FakePromise1, 'subclassing, `this` pattern');201  FakePromise1 = function () { /* empty */ };202  FakePromise2 = function (executor) {203    executor(null, () => { /* empty */ });204  };205  const FakePromise3 = function (executor) {206    executor(() => { /* empty */ }, null);207  };208  FakePromise1.resolve = FakePromise2.resolve = FakePromise3.resolve = bind(resolve, Promise);209  assert.throws(() => {210    all.call(FakePromise1, [1, 2, 3]);211  }, 'NewPromiseCapability validations, #1');212  assert.throws(() => {213    all.call(FakePromise2, [1, 2, 3]);214  }, 'NewPromiseCapability validations, #2');215  assert.throws(() => {216    all.call(FakePromise3, [1, 2, 3]);217  }, 'NewPromiseCapability validations, #3');218});219QUnit.test('Promise.race', assert => {220  const { race, resolve } = Promise;221  assert.isFunction(race);222  assert.arity(race, 1);223  const iterable = createIterable([1, 2, 3]);224  Promise.race(iterable).catch(() => { /* empty */ });225  assert.ok(iterable.received, 'works with iterables: iterator received');226  assert.ok(iterable.called, 'works with iterables: next called');227  const array = [];228  let done = false;229  array['@@iterator'] = undefined;230  array[Symbol.iterator] = function () {231    done = true;232    return getIteratorMethod([]).call(this);233  };234  Promise.race(array);235  assert.ok(done);236  assert.throws(() => {237    race.call(null, []).catch(() => { /* empty */ });238  }, TypeError, 'throws without context');239  done = false;240  try {241    Promise.resolve = function () {242      throw new Error();243    };244    Promise.race(createIterable([1, 2, 3], {245      return() {246        done = true;247      },248    })).catch(() => { /* empty */ });249  } catch (error) { /* empty */ }250  Promise.resolve = resolve;251  assert.ok(done, 'iteration closing');252  let FakePromise1 = function (executor) {253    executor(() => { /* empty */ }, () => { /* empty */ });254  };255  let FakePromise2 = FakePromise1[Symbol.species] = function (executor) {256    executor(() => { /* empty */ }, () => { /* empty */ });257  };258  FakePromise1.resolve = FakePromise2.resolve = bind(resolve, Promise);259  assert.ok(race.call(FakePromise1, [1, 2, 3]) instanceof FakePromise1, 'subclassing, `this` pattern');260  FakePromise1 = function () { /* empty */ };261  FakePromise2 = function (executor) {262    executor(null, () => { /* empty */ });263  };264  const FakePromise3 = function (executor) {265    executor(() => { /* empty */ }, null);266  };267  FakePromise1.resolve = FakePromise2.resolve = FakePromise3.resolve = bind(resolve, Promise);268  assert.throws(() => {269    race.call(FakePromise1, [1, 2, 3]);270  }, 'NewPromiseCapability validations, #1');271  assert.throws(() => {272    race.call(FakePromise2, [1, 2, 3]);273  }, 'NewPromiseCapability validations, #2');274  assert.throws(() => {275    race.call(FakePromise3, [1, 2, 3]);276  }, 'NewPromiseCapability validations, #3');277});278QUnit.test('Promise.resolve', assert => {279  const { resolve } = Promise;280  assert.isFunction(resolve);281  assert.throws(() => {282    resolve.call(null, 1).catch(() => { /* empty */ });283  }, TypeError, 'throws without context');284  function FakePromise1(executor) {285    executor(() => { /* empty */ }, () => { /* empty */ });286  }287  FakePromise1[Symbol.species] = function (executor) {288    executor(() => { /* empty */ }, () => { /* empty */ });289  };290  assert.ok(resolve.call(FakePromise1, 42) instanceof FakePromise1, 'subclassing, `this` pattern');291  assert.throws(() => {292    resolve.call(() => { /* empty */ }, 42);293  }, 'NewPromiseCapability validations, #1');294  assert.throws(() => {295    resolve.call(executor => {296      executor(null, () => { /* empty */ });297    }, 42);298  }, 'NewPromiseCapability validations, #2');299  assert.throws(() => {300    resolve.call(executor => {301      executor(() => { /* empty */ }, null);302    }, 42);303  }, 'NewPromiseCapability validations, #3');304});305QUnit.test('Promise.reject', assert => {306  const { reject } = Promise;307  assert.isFunction(reject);308  assert.throws(() => {309    reject.call(null, 1).catch(() => { /* empty */ });310  }, TypeError, 'throws without context');311  function FakePromise1(executor) {312    executor(() => { /* empty */ }, () => { /* empty */ });313  }314  FakePromise1[Symbol.species] = function (executor) {315    executor(() => { /* empty */ }, () => { /* empty */ });316  };317  assert.ok(reject.call(FakePromise1, 42) instanceof FakePromise1, 'subclassing, `this` pattern');318  assert.throws(() => {319    reject.call(() => { /* empty */ }, 42);320  }, 'NewPromiseCapability validations, #1');321  assert.throws(() => {322    reject.call(executor => {323      executor(null, () => { /* empty */ });324    }, 42);325  }, 'NewPromiseCapability validations, #2');326  assert.throws(() => {327    reject.call(executor => {328      executor(() => { /* empty */ }, null);329    }, 42);330  }, 'NewPromiseCapability validations, #3');331});332if (PROTO) QUnit.test('Promise subclassing', assert => {333  function SubPromise(executor) {334    const self = new Promise(executor);335    setPrototypeOf(self, SubPromise.prototype);336    self.mine = 'subclass';337    return self;338  }339  setPrototypeOf(SubPromise, Promise);340  SubPromise.prototype = create(Promise.prototype);341  SubPromise.prototype.constructor = SubPromise;342  let promise1 = SubPromise.resolve(5);343  assert.strictEqual(promise1.mine, 'subclass');344  promise1 = promise1.then(it => {345    assert.strictEqual(it, 5);346  });347  assert.strictEqual(promise1.mine, 'subclass');348  let promise2 = new SubPromise(resolve => {349    resolve(6);350  });351  assert.strictEqual(promise2.mine, 'subclass');352  promise2 = promise2.then(it => {353    assert.strictEqual(it, 6);354  });355  assert.strictEqual(promise2.mine, 'subclass');356  const promise3 = SubPromise.all([promise1, promise2]);357  assert.strictEqual(promise3.mine, 'subclass');358  assert.ok(promise3 instanceof Promise);359  assert.ok(promise3 instanceof SubPromise);360  promise3.then(assert.async(), error => {361    assert.ok(false, error);362  });363});364// qunit@2.5 strange bug365QUnit.skip('Unhandled rejection tracking', assert => {366  let done = false;367  const resume = assert.async();368  if (GLOBAL.process) {369    assert.expect(3);370    function onunhandledrejection(reason, promise) {371      process.removeListener('unhandledRejection', onunhandledrejection);372      assert.same(promise, $promise, 'unhandledRejection, promise');373      assert.same(reason, 42, 'unhandledRejection, reason');374      $promise.catch(() => {375        // empty376      });377    }378    function onrejectionhandled(promise) {379      process.removeListener('rejectionHandled', onrejectionhandled);380      assert.same(promise, $promise, 'rejectionHandled, promise');381      done || resume();382      done = true;383    }384    process.on('unhandledRejection', onunhandledrejection);385    process.on('rejectionHandled', onrejectionhandled);386  } else {387    if (GLOBAL.addEventListener) {388      assert.expect(8);389      function onunhandledrejection(it) {390        assert.same(it.promise, $promise, 'addEventListener(unhandledrejection), promise');391        assert.same(it.reason, 42, 'addEventListener(unhandledrejection), reason');392        GLOBAL.removeEventListener('unhandledrejection', onunhandledrejection);393      }394      GLOBAL.addEventListener('rejectionhandled', onunhandledrejection);395      function onrejectionhandled(it) {396        assert.same(it.promise, $promise, 'addEventListener(rejectionhandled), promise');397        assert.same(it.reason, 42, 'addEventListener(rejectionhandled), reason');398        GLOBAL.removeEventListener('rejectionhandled', onrejectionhandled);399      }400      GLOBAL.addEventListener('rejectionhandled', onrejectionhandled);401    } else assert.expect(4);402    GLOBAL.onunhandledrejection = function (it) {403      assert.same(it.promise, $promise, 'onunhandledrejection, promise');404      assert.same(it.reason, 42, 'onunhandledrejection, reason');405      setTimeout(() => {406        $promise.catch(() => {407          // empty408        });409      }, 1);410      GLOBAL.onunhandledrejection = null;411    };412    GLOBAL.onrejectionhandled = function (it) {413      assert.same(it.promise, $promise, 'onrejectionhandled, promise');414      assert.same(it.reason, 42, 'onrejectionhandled, reason');415      GLOBAL.onrejectionhandled = null;416      done || resume();417      done = true;418    };419  }420  Promise.reject(43).catch(() => {421    // empty422  });423  const $promise = Promise.reject(42);424  setTimeout(() => {425    done || resume();426    done = true;427  }, 3e3);...

Using AI Code Generation

1var newPromiseCapability = function (C) {2    var resolve, reject;3    var promise = new C(function ($$resolve, $$reject) {4        if (resolve !== undefined || reject !== undefined)5            throw TypeError('Bad Promise constructor');6        resolve = $$resolve;7        reject = $$reject;8    });9    if (resolve === undefined || reject === undefined)10        throw TypeError('Bad Promise constructor');11    return { promise: promise, resolve: resolve, reject: reject };12};13var p = newPromiseCapability(Promise);14p.resolve(42);15p.promise.then(function (v) {16    $DONE('This promise should not be fulfilled: ' + v);17}, function (e) {18    $DONE('This promise should not be rejected: ' + e);19});

Using AI Code Generation

1var newPromiseCapability = function (C) {2    if (typeof C !== 'function') {3        throw new TypeError('Bad promise constructor');4    }5    var capability = {6    };7    var executor = function (resolve, reject) {8        if (capability.resolve !== undefined || capability.reject !== undefined) {9            throw new TypeError('Bad Promise implementation!');10        }11        capability.resolve = resolve;12        capability.reject = reject;13    };14    try {15        var promise = new C(executor);16        if (Object(promise) !== promise) {17            throw new TypeError('Bad promise constructor');18        }19        capability.promise = promise;20    } catch (e) {21        capability.reject(e);22    }23    return capability;24};25var p = newPromiseCapability(Promise);26p.resolve(42);27p.promise.then(function (v) {28});

Using AI Code Generation

1var newPromiseCapability = require('wpt').newPromiseCapability;2var promiseCapability = newPromiseCapability(Promise);3promiseCapability.promise.then(function(value) {4  console.log(value);5});6promiseCapability.resolve('foo');

Using AI Code Generation

1var test = require('wpt').test;2var newPromiseCapability = require('wpt').newPromiseCapability;3var p = newPromiseCapability(test.Promise);4p.promise.then(function (x) {5    test.step(function () {6        test.assert_equals(x, 42, 'Promise fulfilled with 42');7    });8    test.done();9});10p.resolve(42);

Using AI Code Generation

1const wpt = require('webpagetest');2const wptTest = wpt('A.345f4a6a7f0f3d2b0a1d3e6a0f6c2f6e');3}, (err, data) => {4    if (err) {5        console.log(err);6    }7    console.log(data);8});9const wpt = require('webpagetest');10const wptTest = wpt('A.345f4a6a7f0f3d2b0a1d3e6a0f6c2f6e');11}, (err, data) => {12    if (err) {13        console.log(err);14    }15    console.log(data);16});17const wpt = require('webpagetest');18const wptTest = wpt('A.345f4a6a7f0f3d2b0a1d3e6a0f6c2f6e');19}, (err, data) => {20    if (err) {21        console.log(err);22    }23    console.log(data);24});

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