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How to use loadResolver method in Jest

Best JavaScript code snippet using jest

lib.js

Source:lib.js

...159        this.loadResolver = null;160        this.parentOrigin = location.protocol + "//friendfeed.com";161        window.addEventListener('message', function (event) {162            if (event.origin === self.parentOrigin && self.loadResolver !== null) {163                self.loadResolver(getSettings(event.data));164                self.loadResolver = null;165            }166        });167    },168    loadSettings: function () {169        var self = this;170        return new Promise(function (resolve) {171            self.loadResolver = resolve;172            window.parent.postMessage({action: "getSettings", value: null}, self.parentOrigin);173        });174    },175    saveSettings: function (settings) {176        var self = this;177        return new Promise(function (resolve) {...

injectorFactory.js

Source:injectorFactory.js

...45            resolveProp = function (key) {46                if (!key) {47                    return;48                }49                return resolvers.loadResolver(key) || resolvers.loadResolver(50                    key.displayName);51            }52        } else if (typeof resolvers === 'function') {53            resolveProp = resolvers;54        } else {55            throw new Error(56                'resolvers must be iterable or have a loadResolver function');57        }58    }59    const Injector = {60        resolveProp,61        resolver(propType, resolve) {62            if (propType == null || resolve == null) {63                throw new Error('must define both a propType and a resolver');...

tokenize-japanese.js

Source:tokenize-japanese.js

...143 };144 145 init().then(()=>{146 loaded = true;147 loadResolver();148 });...

loader-test.js

Source:loader-test.js

...20    it('should load resolvers', function () {21        const loader = loaderFactory([{22            resolvers: [a, b]23        }]);24        const r      = loader.loadResolver(a);25        expect(r).to.eql(b);26        const loader2 = loaderFactory([loader]);27        loader2.addLoader({ resolvers: [[c, d]] });28        expect(loader2.loadResolver(a)).to.eql(b);29        expect(loader2.loadResolver(c)).to.eql(d);30        expect(loader2.loadResolver(e)).to.not.exist;31        expect(loader.loadResolver(c)).to.not.exist;32    });33    it('should load many resolvers', function () {34        const loader = loaderFactory([{35            resolvers: [[a, b], [c, d], [e, null]]36        }]);37        expect(loader.loadResolver(a)).to.eql(b);38        expect(loader.loadResolver(c)).to.eql(d);39        expect(loader.loadResolver(e)).to.eql(null);40    });41    it('should load mixed', function () {42        const loader = loaderFactory([{43            resolvers: [a, b]44        }]);45        const loader2 = loaderFactory([{ resolvers: [[c, d]] }, loader]);46        expect(loader2.loadResolver(a)).to.eql(b);47        expect(loader2.loadResolver(a)).to.eql(b);48        expect(loader2.loadResolver(c)).to.eql(d);49        expect(loader2.loadResolver(e)).to.not.exist;50        expect(loader.loadResolver(c)).to.not.exist;51    });52    it('should load list key val', function () {53        const loader = loaderFactory();54        loader.addResolver(a, b);55        const loader2 = loaderFactory([{ resolvers: [[c, d]] }, loader]);56        expect(loader2.listResolvers().map(v => v.name)).to.eql([c, a]);57        loader2.removeResolver(a);58        expect(loader2.listResolvers().map(v => v.name)).to.eql([c]);59    });60    it('should load list array val', function () {61        const loader = loaderFactory();62        loader.addResolver([a, b]);63        const loader2 = loaderFactory([{ resolvers: [[c, d]] }, loader]);64        expect(loader2.listResolvers().map(v => v.name)).to.eql([c, a]);65        loader2.removeResolver(a);66        expect(loader2.listResolvers().map(v => v.name)).to.eql([c]);67    });68    it('should load list nested array val', function () {69        const loader = loaderFactory();70        loader.addResolver([[a, b]]);71        expect(loader.loadResolver(a)).to.eql(b);72    });73    it('should resolve object', function () {74        const loader = loaderFactory([{75            types   : {76                A77            },78            template: {79                B80            }81        }]);82        expect(loader.loadType("A")).to.eql(A);83        expect(loader.loadTemplate("B")).to.eql(B);84    });85    it('should resolve map', function () {86        const loader = loaderFactory([{87            types: new Map([['A', A], ['B', B]])88        }]);89        expect(loader.loadType("A")).to.eql(A);90        expect(loader.loadType("B")).to.eql(B);91    });92    it('should override value', function () {93        const loader = loaderFactory([{94            types: new Map([['A', 1]])95        }]);96        loader.addType('A', 2);97        loader.addLoader(loaderFactory([{98            types: {99                A: 3100            }101        }]));102        expect(loader.loadType("A")).to.eql(3);103    });104    it('should map maps', function () {105        const loader    = loaderFactory();106        const propTypes = {107            a,108            b109        };110        const resolvers = {111            a: c,112            b: e113        };114        loader.addResolvers(propTypes, resolvers);115        expect(loader.loadResolver(a)).to.eql(c);116        expect(loader.loadResolver(b)).to.eql(e);117        //when mapped as such the type can be resolved via string.118        expect(loader.loadResolver('b')).to.eql(e);119    });...

app.es6

Source:app.es6

1require('angular');2require("angular-ui-router");3let _                       = require("lodash");4let { Module }              = require("./module");5let {AngularNamespacer}     = require("./angular-namespacer");6export class App extends Module {7  constructor(name, config = {}) {8    super(name);9    this.configObject = config;10    this.routes = (state) => {};11    this.use('ui.router');12    this.widgetResolvers = [];13  }14  addWidgetResolver(resolver) {15    this.widgetResolvers.push(this.name + "." + resolver);16  }17  bootstrap(cb) {18    this.define();19    angular.element(document).ready(() => {20      angular.bootstrap(document, [this.name]);21      if(typeof cb === 'function') {22        cb();23      }24    });25  }26  define() {27    super.define();28    let loadConfig = (ConfigProvider) => {29      ConfigProvider.addAppConfig(this.configObject);30    };31    loadConfig.$inject = ["interstellar-core.ConfigProvider"];32    this.config(loadConfig);33    let loadRoutes = ($stateProvider, $urlRouterProvider) => {34      $urlRouterProvider.otherwise("/");35      this.routes($stateProvider);36    };37    loadRoutes.$inject = ["$stateProvider", "$urlRouterProvider"];38    this.config(loadRoutes);39    this._loadFunctions();40    this._loadWidgetResolvers(this.amod);41  }42  _loadWidgetResolvers(amod) {43    _.forEach(this.widgetResolvers, function (resolver) {44      let loadResolver = (resolver, WidgetResolutionService) => {45        WidgetResolutionService.addResolver(resolver);46      };47      loadResolver.$inject = [resolver, "interstellar-core.WidgetResolutionService"];48      amod.run(loadResolver);49    });50  }...

ipld-formats.js

Source:ipld-formats.js

1'use strict'2const dagPB = require('ipld-dag-pb')3const dagCBOR = require('ipld-dag-cbor')4const raw = require('ipld-raw')5const multicodec = require('multicodec')6const noop = () => {}7/**8 * @typedef {import('cids')} CID9 */10/**11 * Return an object containing supported IPLD Formats12 *13 * @param {object} [options] - IPLD options passed to the http client constructor14 * @param {Array} [options.formats] - A list of IPLD Formats to use15 * @param {Function} [options.loadFormat] - An async function that can load a format when passed a codec number16 * @returns {Function}17 */18module.exports = ({ formats = [], loadFormat = noop } = {}) => {19  formats = formats || []20  loadFormat = loadFormat || noop21  const configuredFormats = {22    [multicodec.DAG_PB]: dagPB,23    [multicodec.DAG_CBOR]: dagCBOR,24    [multicodec.RAW]: raw25  }26  formats.forEach(format => {27    configuredFormats[format.codec] = format28  })29  /**30   * Attempts to load an IPLD format for the passed CID31   *32   * @param {string} codec - The code to load the format for33   * @returns {Promise<object>} - An IPLD format34   */35  const loadResolver = async (codec) => {36    const number = multicodec.getNumber(codec)37    const format = configuredFormats[number] || await loadFormat(codec)38    if (!format) {39      throw Object.assign(40        new Error(`Missing IPLD format "${codec}"`),41        { missingMulticodec: codec }42      )43    }44    return format45  }46  return loadResolver...

schema.js

Source:schema.js

1'use strict';2var jsyaml  = require('../../lib/js-yaml');3var classes = require('./classes');4module.exports = new jsyaml.Schema({5  include: [6    jsyaml.DEFAULT_FULL_SCHEMA7  ],8  explicit: [9    new jsyaml.Type('!tag3', {10      loadKind: 'mapping',11      loadResolver: classes.Tag3.fromYAMLNode,12      dumpInstanceOf: classes.Tag3,13      dumpRepresenter: classes.Tag3.toYAMLNode14    }),15    new jsyaml.Type('!tag2', {16      loadKind: 'scalar',17      loadResolver: classes.Tag2.fromYAMLNode,18      dumpInstanceOf: classes.Tag2,19      dumpRepresenter: classes.Tag2.toYAMLNode20    }),21    new jsyaml.Type('!tag1', {22      loadKind: 'mapping',23      loadResolver: classes.Tag1.fromYAMLNode,24      dumpInstanceOf: classes.Tag125    }),26    new jsyaml.Type('!foo', {27      loadKind: 'mapping',28      loadResolver: classes.Foo.fromYAMLNode,29      dumpInstanceOf: classes.Foo,30      dumpRepresenter: classes.Foo.toYAMLNode31    })32  ]...

utils.test.js

Source:utils.test.js

...6    isFunction(loadResolver)7  ).toBe(true)8  9  expect(10    isEmpty(loadResolver(path.join(__dirname, 'utils/resolvers')))11  ).toBe(false);...

Jest Testing Tutorial

LambdaTest’s Jest Testing Tutorial covers step-by-step guides around Jest with code examples to help you be proficient with the Jest framework. The Jest tutorial has chapters to help you learn right from the basics of Jest framework to code-based tutorials around testing react apps with Jest, perform snapshot testing, import ES modules and more.

Chapters

What is Jest Framework
Advantages of Jest - Jest has 3,898,000 GitHub repositories, as mentioned on its official website. Learn what makes Jest special and why Jest has gained popularity among the testing and developer community.
Jest Installation - All the prerequisites and set up steps needed to help you start Jest automation testing.
Using Jest with NodeJS Project - Learn how to leverage Jest framework to automate testing using a NodeJS Project.
Writing First Test for Jest Framework - Get started with code-based tutorial to help you write and execute your first Jest framework testing script.
Jest Vocabulary - Learn the industry renowned and official jargons of the Jest framework by digging deep into the Jest vocabulary.
Unit Testing with Jest - Step-by-step tutorial to help you execute unit testing with Jest framework.
Jest Basics - Learn about the most pivotal and basic features which makes Jest special.
Jest Parameterized Tests - Avoid code duplication and fasten automation testing with Jest using parameterized tests. Parameterization allows you to trigger the same test scenario over different test configurations by incorporating parameters.
Jest Matchers - Enforce assertions better with the help of matchers. Matchers help you compare the actual output with the expected one. Here is an example to see if the object is acquired from the correct class or not. -

|it('check_object_of_Car', () => { expect(newCar()).toBeInstanceOf(Car); });| | :- |

Jest Hooks: Setup and Teardown - Learn how to set up conditions which needs to be followed by the test execution and incorporate a tear down function to free resources after the execution is complete.
Jest Code Coverage - Unsure there is no code left unchecked in your application. Jest gives a specific flag called --coverage to help you generate code coverage.
HTML Report Generation - Learn how to create a comprehensive HTML report based on your Jest test execution.
Testing React app using Jest Framework - Learn how to test your react web-application with Jest framework in this detailed Jest tutorial.
Test using LambdaTest cloud Selenium Grid - Run your Jest testing script over LambdaTest cloud-based platform and leverage parallel testing to help trim down your test execution time.
Snapshot Testing for React Front Ends - Capture screenshots of your react based web-application and compare them automatically for visual anomalies with the help of Jest tutorial.
Bonus: Import ES modules with Jest - ES modules are also known as ECMAScript modules. Learn how to best use them by importing in your Jest testing scripts.
Jest vs Mocha vs Jasmine - Learn the key differences between the most popular JavaScript-based testing frameworks i.e. Jest, Mocha, and Jasmine.
Jest FAQs(Frequently Asked Questions) - Explore the most commonly asked questions around Jest framework, with their answers.