How to use getSingle method in Cucumber-gherkin

...60			return r.shift();61		}62		return null;63	}64	getSingle(elem, query) {65		let rv = this.getNode(elem, 'ml:' + query);66		return rv ? rv.textContent.trim() : '';67	}68	getLinkRes(elem, query) {69		let rv = this.getNode(elem, 'ml:' + query);70		if (rv) {71			let n = this.getSingle(rv, 'name'), l = this.checkURL(this.getSingle(rv, 'url'));72			if (n && l) {73				return [n, l];74			}75		}76		return null;77	}78	checkURL(url, allowed) {79		if (!url) {80			return null;81		}82		try {83			url = Services.io.newURI(url, this._doc.characterSet, null);84			if (url.scheme === 'file') {85				throw new Exception("file protocol invalid!");86			}87			// check for some popular bad links :p88			if (!~['http', 'https', 'ftp'].indexOf(url.scheme) || !~url.host.indexOf('.')) {89				if (!(allowed instanceof Array)) {90					throw new Exception("bad link!");91				}92				if (!~allowed.indexOf(url.scheme)) {93					throw new Exception("not allowed!");94				}95			}96			return url.spec;97		}98		catch (ex) {99			log(LOG_ERROR, "checkURL: failed to parse " + url, ex);100			// no-op101		}102		return null;103	}104}105/**106 * Metalink3 Parser107 * @param doc document to parse108 * @return Metalink109 */110class Metalinker3 extends Base {111	constructor(doc) {112		let root = doc.documentElement;113		if (root.nodeName !== 'metalink' || root.getAttribute('version') !== '3.0') {114			throw new Error('mlinvalid');115		}116		super(doc, NS_METALINKER3);117	}118	parse(aReferrer) {119		if (aReferrer && 'spec' in aReferrer) {120			aReferrer = aReferrer.spec;121		}122		let doc = this._doc;123		let root = doc.documentElement;124		let downloads = [];125		let files = this.getNodes(doc, '//ml:files/ml:file');126		if (!files.length) {127			throw new Exception("No valid file nodes");128		}129		for (let file of files) {130			let fileName = file.getAttribute('name');131			if (!fileName) {132				throw new Exception("LocalFile name not provided!");133			}134			let referrer = null;135			if (file.hasAttributeNS(NS_DTA, 'referrer')) {136				referrer = file.getAttributeNS(NS_DTA, 'referrer');137			}138			else {139				referrer = aReferrer;140			}141			let num = null;142			if (file.hasAttributeNS(NS_DTA, 'num')) {143				try {144					num = parseInt(file.getAttributeNS(NS_DTA, 'num'), 10);145				}146				catch (ex) {147					/* no-op */148				}149			}150			if (!num) {151				num = DTA.currentSeries();152			}153			let startDate = new Date();154			if (file.hasAttributeNS(NS_DTA, 'startDate')) {155				try {156					startDate = new Date(parseInt(file.getAttributeNS(NS_DTA, 'startDate'), 10));157				}158				catch (ex) {159					/* no-op */160				}161			}162			let urls = [];163			let urlNodes = this.getNodes(file, 'ml:resources/ml:url');164			for (var url of urlNodes) {165				let preference = 1;166				let charset = doc.characterSet;167				if (url.hasAttributeNS(NS_DTA, 'charset')) {168					charset = url.getAttributeNS(NS_DTA, 'charset');169				}170				let uri = null;171				try {172					if (url.hasAttribute('type') && !url.getAttribute('type').match(/^(?:https?|ftp)$/i)) {173						throw new Exception("Invalid url type");174					}175					uri = this.checkURL(url.textContent.trim());176					if (!uri) {177						throw new Exception("Invalid url");178					}179					else if(!url.hasAttribute('type') && uri.substr(-8) === ".torrent") {180						throw new Exception("Torrent downloads not supported");181					}182					uri = Services.io.newURI(uri, charset, null);183				}184				catch (ex) {185					log(LOG_ERROR, "Failed to parse URL" + url.textContent, ex);186					continue;187				}188				if (url.hasAttribute('preference')) {189					let a = parseInt(url.getAttribute('preference'), 10);190					if (isFinite(a) && a > 0 && a < 101) {191						preference = a;192					}193				}194				if (url.hasAttribute('location')) {195					let a = url.getAttribute('location').slice(0,2).toLowerCase();196					if (~LOCALE.indexOf(a)) {197						preference = 100 + preference;198					}199				}200				urls.push(new DTA.URL(uri, preference));201			}202			if (!urls.length) {203				continue;204			}205			let size = this.getSingle(file, 'size');206			size = parseInt(size, 10);207			if (!isFinite(size)) {208				size = 0;209			}210			let hash = null;211			for (let h of this.getNodes(file, 'ml:verification/ml:hash')) {212				try {213					h = new DTA.Hash(h.textContent.trim(), h.getAttribute('type'));214					if (!hash || hash.q < h.q) {215						hash = h;216					}217				}218				catch (ex) {219					log(LOG_ERROR, "Failed to parse hash: " + h.textContent.trim() + "/" + h.getAttribute('type'), ex);220				}221			}222			if (hash) {223				hash = new DTA.HashCollection(hash);224				let pieces = this.getNodes(file, 'ml:verification/ml:pieces');225				if (pieces.length) {226					pieces = pieces[0];227					let type = pieces.getAttribute('type').trim();228					try {229						hash.parLength = parseInt(pieces.getAttribute('length'), 10);230						if (!isFinite(hash.parLength) || hash.parLength < 1) {231							throw new Exception("Invalid pieces length");232						}233						let collection = [];234						let maxPiece = Math.ceil(size / hash.parLength);235						for (let piece of this.getNodes(pieces, 'ml:hash')) {236							try {237								let num = parseInt(piece.getAttribute('piece'), 10);238								if (!maxPiece || (num >= 0 && num <= maxPiece)) {239									collection[num] =  new DTA.Hash(piece.textContent.trim(), type);240								}241								else {242									throw new Exception("out of bound piece");243								}244							}245							catch (ex) {246								log(LOG_ERROR, "Failed to parse piece", ex);247								throw ex;248							}249						}250						let totalPieces = maxPiece || collection.length;251						for (let i = 0; i < totalPieces; i++) {252							if (collection[i]) {253								hash.add(collection[i]);254							}255							else {256								throw new Exception("missing piece");257							}258						}259						log(LOG_DEBUG, "loaded " + hash.partials.length + " partials");260					}261					catch (ex) {262						log(LOG_ERROR, "Failed to parse pieces", ex);263						hash = new DTA.HashCollection(hash.full);264					}265				}266			}267			let desc = this.getSingle(file, 'description');268			if (!desc) {269				desc = this.getSingle(root, 'description');270			}271			downloads.push({272				'url': new UrlManager(urls),273				'fileName': fileName,274				'referrer': referrer ? referrer : null,275				'numIstance': num,276				'title': '',277				'description': desc,278				'startDate': startDate,279				'hashCollection': hash,280				'license': this.getLinkRes(file, "license"),281				'publisher': this.getLinkRes(file, "publisher"),282				'identity': this.getSingle(file, 'identity'),283				'copyright': this.getSingle(file, 'copyright'),284				'size': size,285				'version': this.getSingle(file, 'version'),286				'logo': this.checkURL(this.getSingle(file, 'logo', ['data'])),287				'lang': this.getSingle(file, 'language'),288				'sys': this.getSingle(file, 'os'),289				'mirrors': urls.length,290				'selected': true,291				'fromMetalink': true292			});293		}294		if (!downloads.length) {295			throw new Exception("No valid files to process");296		}297		let info = {298			'identity': this.getSingle(root, 'identity'),299			'description': this.getSingle(root, 'description'),300			'logo': this.checkURL(this.getSingle(root, 'logo', ['data'])),301			'license': this.getLinkRes(root, "license"),302			'publisher': this.getLinkRes(root, "publisher"),303			'start': false304		};305		return new Metalink(downloads, info, "Metalinker Version 3.0");306	}307}308/**309 * Metalink RFC5854 (IETF) Parser310 * @param doc document to parse311 * @return Metalink312 */313class MetalinkerRFC5854 extends Base {314	constructor(doc) {315		let root = doc.documentElement;316		if (root.nodeName !== 'metalink' || root.namespaceURI !== NS_METALINK_RFC5854 ) {317			if (log.enabled) {318				log(LOG_DEBUG, root.nodeName + "\nns:" + root.namespaceURI);319			}320			throw new Error('mlinvalid');321		}322		super(doc, NS_METALINK_RFC5854);323	}324	parse(aReferrer) {325		if (aReferrer && 'spec' in aReferrer) {326			aReferrer = aReferrer.spec;327		}328		let doc = this._doc;329		let root = doc.documentElement;330		let downloads = [];331		let files = this.getNodes(doc, '/ml:metalink/ml:file');332		if (!files.length) {333			throw new Exception("No valid file nodes");334		}335		for (let file of files) {336			let fileName = file.getAttribute('name');337			if (!fileName) {338				throw new Exception("LocalFile name not provided!");339			}340			let referrer = null;341			if (file.hasAttributeNS(NS_DTA, 'referrer')) {342				referrer = file.getAttributeNS(NS_DTA, 'referrer');343			}344			else {345				referrer = aReferrer;346			}347			let num = null;348			if (file.hasAttributeNS(NS_DTA, 'num')) {349				try {350					num = parseInt(file.getAttributeNS(NS_DTA, 'num'), 10);351				}352				catch (ex) {353					/* no-op */354				}355			}356			if (!num) {357				num = DTA.currentSeries();358			}359			let startDate = new Date();360			if (file.hasAttributeNS(NS_DTA, 'startDate')) {361				try {362					startDate = new Date(parseInt(file.getAttributeNS(NS_DTA, 'startDate'), 10));363				}364				catch (ex) {365					/* no-op */366				}367			}368			let urls = [];369			let urlNodes = this.getNodes(file, 'ml:url');370			for (var url of urlNodes) {371				let preference = 1;372				let charset = doc.characterSet;373				if (url.hasAttributeNS(NS_DTA, 'charset')) {374					charset = url.getAttributeNS(NS_DTA, 'charset');375				}376				let uri = null;377				try {378					uri = this.checkURL(url.textContent.trim());379					if (!uri) {380						throw new Exception("Invalid url");381					}382					uri = Services.io.newURI(uri, charset, null);383				}384				catch (ex) {385					log(LOG_ERROR, "Failed to parse URL" + url.textContent, ex);386					continue;387				}388				if (url.hasAttribute('priority')) {389					let a = parseInt(url.getAttribute('priority'), 10);390					if (a > 0) {391						preference = a;392					}393				}394				if (url.hasAttribute('location')) {395					let a = url.getAttribute('location').slice(0,2).toLowerCase();396					if (~LOCALE.indexOf(a)) {397						preference = Math.max(preference / 4, 1);398					}399				}400				urls.push(new DTA.URL(uri, preference));401			}402			if (!urls.length) {403				continue;404			}405			normalizeMetaPrefs(urls);406			let size = this.getSingle(file, 'size');407			size = parseInt(size, 10);408			if (!isFinite(size)) {409				size = 0;410			}411			let hash = null;412			for (let h of this.getNodes(file, 'ml:hash')) {413				try {414					h = new DTA.Hash(h.textContent.trim(), h.getAttribute('type'));415					if (!hash || hash.q < h.q) {416						hash = h;417					}418				}419				catch (ex) {420					log(LOG_ERROR, "Failed to parse hash: " + h.textContent.trim() + "/" + h.getAttribute('type'), ex);421				}422			}423			if (hash) {424				Cu.reportError(hash);425				hash = new DTA.HashCollection(hash);426				let pieces = this.getNodes(file, 'ml:pieces');427				if (pieces.length) {428					pieces = pieces[0];429					let type = pieces.getAttribute('type').trim();430					try {431						hash.parLength = parseInt(pieces.getAttribute('length'), 10);432						if (!isFinite(hash.parLength) || hash.parLength < 1) {433							throw new Exception("Invalid pieces length");434						}435						for (let piece of this.getNodes(pieces, 'ml:hash')) {436							try {437								hash.add(new DTA.Hash(piece.textContent.trim(), type));438							}439							catch (ex) {440								log(LOG_ERROR, "Failed to parse piece", ex);441								throw ex;442							}443						}444						if (size && hash.parLength * hash.partials.length < size) {445							throw new Exception("too few partials");446						}447						else if(size && (hash.partials.length - 1) * hash.parLength > size) {448							throw new Exception("too many partials");449						}450						log(LOG_DEBUG, "loaded " + hash.partials.length + " partials");451					}452					catch (ex) {453						log(LOG_ERROR, "Failed to parse pieces", ex);454						hash = new DTA.HashCollection(hash.full);455					}456				}457			}458			let desc = this.getSingle(file, 'description');459			if (!desc) {460				desc = this.getSingle(root, 'description');461			}462			downloads.push({463				'url': new UrlManager(urls),464				'fileName': fileName,465				'referrer': referrer ? referrer : null,466				'numIstance': num,467				'title': '',468				'description': desc,469				'startDate': startDate,470				'hashCollection': hash,471				'license': this.getLinkRes(file, "license"),472				'publisher': this.getLinkRes(file, "publisher"),473				'identity': this.getSingle(file, "identity"),474				'copyright': this.getSingle(file, "copyright"),475				'size': size,476				'version': this.getSingle(file, "version"),477				'logo': this.checkURL(this.getSingle(file, "logo", ['data'])),478				'lang': this.getSingle(file, "language"),479				'sys': this.getSingle(file, "os"),480				'mirrors': urls.length,481				'selected': true,482				'fromMetalink': true483			});484		}485		if (!downloads.length) {486			throw new Exception("No valid files to process");487		}488		let info = {489			'identity': this.getSingle(root, "identity"),490			'description': this.getSingle(root, "description"),491			'logo': this.checkURL(this.getSingle(root, "logo", ['data'])),492			'license': this.getLinkRes(root, "license"),493			'publisher': this.getLinkRes(root, "publisher"),494			'start': false495		};496		return new Metalink(downloads, info, "Metalinker Version 4.0 (RFC5854/IETF)");497	}498}499const __parsers__ = [500	Metalinker3,501	MetalinkerRFC5854502];503/**504 * Parse a metalink505 * @param aURI (nsIURI) Metalink URI...

...44                        should.not.exist(val);45                        retUser.should.equal(user);46                    }47                );48                userSvc.getSingle()49                    .then(function(ret) {50                        ret.args[0].should.equal(userName);51                        return ret.authenticate()52                            .then(function(isMatch) {53                                isMatch.should.equal(true);54                            })55                            .fail(function(err) {56                                throw err;57                            });58                    })59                    .fail(function(err) {60                        throw err;61                    })62                    .fin(done)63                    .done();64            });65            it('returns null when authenticate does not match user', function (done) {66                var userName = testUtils.getRandomString(10);67                userSvc.getSingle = promiseUtils.getResolveNullPromiseStub();68                passportSvc._setUserService(userSvc);69                passportSvc.userLookupForStrategy(userName, '',70                    function (val,user) {71                        should.not.exist(val);72                        user.should.equal(false);73                    }74                );75                userSvc.getSingle()76                    .then(function(ret) {77                        should.not.exist(ret);78                    })79                    .fail(function(err) {80                        throw err;81                    })82                    .fin(done)83                    .done();84            });85            it('returns an error when authenticate gets error', function (done) {86                var userName = testUtils.getRandomString(10);87                var testError = testUtils.getRandomString(10);88                var user = {89                    authenticate: promiseUtils.getRejectExactlyPromiseStub(testError)90                };91                userSvc.getSingle = promiseUtils.getResolveExactlyPromiseStub(user);92                passportSvc._setUserService(userSvc);93                passportSvc.userLookupForStrategy(userName, '',94                    function (err) {95                        err.message.should.equal(testError);96                    }97                );98                userSvc.getSingle()99                    .then(function(ret) {100                        ret.args[0].should.equal(userName);101                        return ret.authenticate()102                            .then(function() {103                                throw new Error('Resolved when should have rejected');104                            })105                            .fail(function(err) {106                                err.message.should.equal(testError);107                            });108                    })109                    .fail(function(err) {110                        throw err;111                    })112                    .fin(done)113                    .done();114            });115            it('returns an error when getSingle rejects', function (done) {116                var userName = testUtils.getRandomString(10);117                var testError = testUtils.getRandomString(10);118                userSvc.getSingle = promiseUtils.getRejectExactlyPromiseStub(testError);119                passportSvc._setUserService(userSvc);120                passportSvc.userLookupForStrategy(userName, '',121                    function (err) {122                        err.message.should.equal(testError);123                    }124                );125                userSvc.getSingle()126                    .then(function() {127                        throw new Error('Resolved when should have rejected');128                    })129                    .fail(function(err) {130                        err.message.should.equal(testError);131                    })132                    .fin(done)133                    .done();134            });135        });136        describe('initialize', function () {137            it('sets up passport', function () {138                passportSvc.initialize(serverSvcStub);139                sinon.assert.calledOnce(passport.use);...

...40    { schemeName: { user: 'user', pass: 'pass' }, name: 'app-3' },41  ],42};43it('should return apiKey property for oauth', () => {44  expect(getSingle(topLevelUser, { type: 'oauth2' })).toBe('123456');45});46it('should return apiKey property for apiKey', () => {47  expect(getSingle(topLevelUser, { type: 'oauth2' })).toBe('123456');48});49it('should return user/pass properties for basic auth', () => {50  expect(getSingle(topLevelUser, { type: 'http', scheme: 'basic' })).toEqual({51    user: 'user',52    pass: 'pass',53  });54});55it('should return first item from keys array if no app selected', () => {56  expect(getSingle(keysUser, { type: 'oauth2' })).toBe('123456');57});58it('should return selected app from keys array if app provided', () => {59  expect(getSingle(keysUser, { type: 'oauth2' }, 'app-2')).toBe('7890');60});61it('should return item by scheme name if no apiKey/user/pass', () => {62  expect(getSingle(topLevelSchemeUser, { type: 'oauth2', _key: 'schemeName' })).toBe('scheme-key');63  expect(getSingle(keysSchemeUser, { type: 'oauth2', _key: 'schemeName' })).toBe('scheme-key-1');64  expect(getSingle(keysSchemeUser, { type: 'oauth2', _key: 'schemeName' }, 'app-2')).toBe(65    'scheme-key-2',66  );67  expect(getSingle(keysSchemeUser, { type: 'http', _key: 'schemeName' }, 'app-3')).toEqual({68    user: 'user',69    pass: 'pass',70  });71});72it('should return emptystring for anything else', () => {73  expect(getSingle(topLevelUser, { type: 'unknown' })).toBe('');74  expect(getSingle({}, { type: 'http', scheme: 'basic' })).toEqual({ user: '', pass: '' });75  expect(getSingle(keysUser, { type: 'unknown' })).toBe('');76  expect(getSingle(keysUser, { type: 'unknown' }, 'app-2')).toBe('');77});78it('should allow scheme to be undefined', () => {79  expect(getSingle(topLevelUser)).toBe('');...

...55//}56//var PersonB = function () {57//    this.name = "农码爱妹子";58//} 59//var singlePersonA = getSingle(PersonA);//获取PersonA的单例60//var singlePersonB = getSingle(PersonB);//获取PersonB的单例61//var a1 = singlePersonA();62//var a2 = singlePersonA();63//var a3 = singlePersonB();64//var a4 = singlePersonB();65//console.log(a1 === a2);//true66//console.log(a3 === a4);//true67//console.log(a1 === a3);//false 68//通用的创建单例对象的方法69var getSingle = function (obj) {70    var instance;71    return function () {72        return instance || (instance = new obj());73    }74};75//获取tab1的html数据76var getTab1Html = function () {77    this.url = "/tab/tab1.json";78    //$.get(this.url, function (data) {79    //    //这里获取请求到的数据，然后加载到tab页面80    //}, "json");81    console.log("执行");82}83var getTab2Html = function () {84    this.url = "/tab/tab2.json";85    //$.get(this.url, function (data) {86    //    //这里获取请求到的数据，然后加载到tab页面87    //}, "json");88    console.log("执行");89} 90var loadTab1 = getSingle(getTab1Html);91var loadTab2 = getSingle(getTab2Html);92//点击tab1的时候加载tab1的数据93$("#tab1").on("click", function () {94    loadTab1();95})96$("#tab2").on("click", function () {97    loadTab2();...

1import React, { useEffect, useState } from 'react'2import FileUploadscreen from './scrreens/FileUploadscreen';3import { getsingleFiles, getMultipleFiles, multipfileUpload } from "./data/api"4function App() {5  const [singleFiles, setSingleFiles] = useState([]);6  const [MultipFiles, setMultipFiles] = useState([]);7 8  const getsingleFileslist = async () => {9    try {10      const filesList = await getsingleFiles();11      setSingleFiles(filesList);12      // console.log(filesList);13    }14    catch (err) {15      console.log(err);16    }17  }18  const getMultipleFilesList = async () => {19    try {20      const MultipfilesList = await getMultipleFiles();21      setMultipFiles(MultipfilesList);22    }23    catch (err) {24      console.log(err);25    }26  }27  useEffect(() => {28    getsingleFileslist();29    getMultipleFilesList();30    //fetchdata();31  }, [])32  return (33    <>34      <div className="container-lg">35        <h1 className="text-center font-weight-bolder text-danger border-bottom">upload app</h1>36        <FileUploadscreen getsingle={() => getsingleFileslist()} getmultipe={() => getMultipleFilesList()} />37        <div className="container-fluid mt-5">38          <div className="row">39            <div className="col-6">40              <h4>single files list</h4>41              <div className="row">42                {singleFiles.map((file, index) =>43                  <div className="col-6">44                    <div className="card mb-2 border-0 p-0">45                      <img src={`https://uploadfilenodejs.herokuapp.com/${file.filePath}`} height="320" width="300" className="card-img-top img-responsive" alt="" />46                    </div>47                  </div>48                )}49              </div>50            </div>51            <div className="col-6 ">52              <h4>Multip files list</h4>53              {MultipFiles.map((file, index) =>54                <div  key={file._id}>55                  <h6 >{"collection name: " + file.title}</h6>56                  <div className="row">57                    {file.files.map((pic) =>58                      <div className="col-6 border">59                        <div className="card mb-2 border-0 p-0">60                          <img src={`https://uploadfilenodejs.herokuapp.com/${pic.filePath}`} height="320" width="400" className="card-img-top img-responsive" alt="" />61                        </div>62                      </div>63                    )}64                  </div>65                </div>66              )}67            </div>68          </div>69        </div>70      </div>71    </>72  );73}...

...7    return function (obj){8        return instance || (instance = new fn(obj));9    };10};11export const createRestaurant = getSingle(Restaurant);12export const createCook = getSingle(Cook);13export const createWaiter = getSingle(Waiter);...

1import getSingle from './getSingle.js';2// 监听前台3export default getSingle( function ( fn ) {4  document.addEventListener( 'resume', () => {5    fn();6  }, false );7  return true;...

1import getSingle from './getSingle.js';2// 监听后台3export default getSingle( function ( fn ) {4  document.addEventListener( 'pause', () => {5    fn();6  }, false );7  return true;...