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How to use hasDefinedKey method in Jest

Best JavaScript code snippet using jest

request.js

Source:request.js

...224	if(!validateUrlPath(path)) {225		throw new Error('Invalid resource');226	}227	for(let param of fetchParamNames) {228		if(param === 'body' && hasDefinedKey(options, param)) {229			fetchConfig[param] = JSON.stringify(options[param]);230		} else {231			fetchConfig[param] = options[param];	232		}233	}234	// build pre-upload (authorisation) request body based on the file provided235	if(hasDefinedKey(options, 'body') && hasDefinedKey(options, 'file')) {236		throw new Error('Cannot use both "file" and "body" in a single request.');237	}238	// process the request for file upload authorisation request239	if(hasDefinedKey(options, 'file') && hasDefinedKey(options, 'fileName')) {240		let fileName = options.fileName;241		let md5sum = SparkMD5.ArrayBuffer.hash(options.file);242		let filesize = options.file.byteLength;243		let mtime = options.mtime || Date.now();244		fetchConfig['body'] = `md5=${md5sum}&filename=${fileName}&filesize=${filesize}&mtime=${mtime}`;245	}246	if(options.uploadRegisterOnly === true) {247		const { fileName, fileSize, md5sum, mtime } = options;248		fetchConfig['body'] = `md5=${md5sum}&filename=${fileName}&filesize=${fileSize}&mtime=${mtime}`;	249	}250	// checking against access-control-allow-methods seems to be case sensitive251	fetchConfig.method = fetchConfig.method.toUpperCase();252	fetchConfig.headers = headers;253	options.retryCount = 0;254	if(options.pretend) {255		const response = new PretendResponse({ url, fetchConfig }, options);256		return { response, ...config, source: 'request' };257	}258	let rawResponse = await fetch(url, fetchConfig);259	if(isTransientFailure(rawResponse) && options.retry > 0) {260		let retriesCounter = options.retry;261		let nextRetryDelay = typeof(options.retryDelay) === 'number' ? options.retryDelay : 1;262		while(retriesCounter > 0) {263			await sleep(nextRetryDelay);264			options.retryCount++;265			rawResponse = await fetch(url, fetchConfig);266			if(!isTransientFailure(rawResponse)) {267				break;268			}269			if(typeof(options.retryDelay) !== 'number') {270				nextRetryDelay *= 2;271			}272			retriesCounter--;273		}274	}275	if((hasDefinedKey(options, 'file') && hasDefinedKey(options, 'fileName')) || options.uploadRegisterOnly === true) {276		if(rawResponse.ok) {277			let authData = await rawResponse.json();278			if('exists' in authData && authData.exists) {279				response = new FileUploadResponse(authData, options, rawResponse);280			} else {281				if(options.uploadRegisterOnly === true) {282					throw new ErrorResponse(283						'API did not recognize provided file meta.',284						'Attempted to register existing file, but API did not recognize provided file meta.',285						rawResponse, options286					);287				}288				let prefix = new Uint8ClampedArray(authData.prefix.split('').map(e => e.charCodeAt(0)));289				let suffix = new Uint8ClampedArray(authData.suffix.split('').map(e => e.charCodeAt(0)));...

jasmineUtils.js

Source:jasmineUtils.js

...155      symbol => Object.getOwnPropertyDescriptor(obj, symbol).enumerable156    )157  );158}159function hasDefinedKey(obj, key) {160  return hasKey(obj, key) && obj[key] !== undefined;161}162function hasKey(obj, key) {163  return Object.prototype.hasOwnProperty.call(obj, key);164}165function isA(typeName, value) {166  return Object.prototype.toString.apply(value) === '[object ' + typeName + ']';167}168function isDomNode(obj) {169  return (170    obj !== null &&171    typeof obj === 'object' &&172    typeof obj.nodeType === 'number' &&173    typeof obj.nodeName === 'string' &&...

ThermodynamicsPlot.js

Source:ThermodynamicsPlot.js

...36    xkey,ykey,xlabel,ylabel,37    dataPointsGenerator38}) =>{39    for (var i=0; i<steps.length; i++){40        if (hasDefinedKey(steps[i],'staticEntropy')){41            steps[i].entropy = steps[i].staticEntropy42        }43    }44    const [canvasDraggable,setCanvasDraggable] = React.useState(false)45    const [mouseLoc, setMouseLoc] = React.useState({x: null, y: null})46    const [minX, setMinX] = React.useState(0)47    const [maxX, setMaxX] = React.useState(0.1)48    const [maxY, setMaxY] = React.useState(500000)49    const posSetter = (index) => {50        return (x,y)=>{51            var update = {}52            if (xkey === 'entropy'){53                if (hasDefinedKey(steps[index],'staticEntropy')){54                    update.staticEntropy = x55                }56            }57            update[xkey] = x58            update[ykey] = y59            var dragPointGroup = {index: index, xkey: xkey}60            steps_updateProperties(index,update,dragPointGroup)61        }62    }63    64    var dataLines = dataPointsGenerator(steps,system)65    var dataPoints = steps.map((step,index)=>{66        return {67            x:step[xkey],...

Thermodynamics.js

Source:Thermodynamics.js

...86    return [point1, point2]87}88const solveEntropyChange = (stepConstraints,system) => {89    const step = Object.assign({},stepConstraints)90    const hasDeltaS = hasDefinedKey(step,'entropyChange')91    const hasP1 = hasDefinedKey(step,'pressure_1')92    const hasV1 = hasDefinedKey(step,'volume_1')93    const hasT1 = hasDefinedKey(step,'temperature_1')94    const hasP2 = hasDefinedKey(step,'pressure_2')95    const hasV2 = hasDefinedKey(step,'volume_2')96    const hasT2 = hasDefinedKey(step,'temperature_2')97    const numberOfConstraints = hasDeltaS + hasP1 + hasV1 + hasT1 + hasP2 + hasV2 + hasT298    if (numberOfConstraints < 4){99        throw new InsufficientConstraintsError('Must specify atleast 4 constraints')100    }101    var [point1, point2] = _extractPointsFromStep(step)102    var A, B, X, hasA, hasB103    hasA = hasB = false104    105    point1 = _computeEntropyCalculationComponent(point1,system)106    if ('entropyCalculationComponent' in point1){107        B = point1.entropyCalculationComponent108        hasB = true109    }110    point2 = _computeEntropyCalculationComponent(point2,system)...

StepListItem.js

Source:StepListItem.js

...24    )25}26const StepListItem = ({step,index,setStep,deleteStep,deleteDisabled}) => {27    var entropyReadOnly = true28    if (hasDefinedKey(step,'staticEntropy')){29        step.entropy = step.staticEntropy30        entropyReadOnly = false31    }32    if (!hasDefinedKey(step,'entropy')){33        step.entropy = ''34    }35    if (!hasDefinedKey(step,'entropyChange')){36        step.entropyChange = ''37    }38    const stepUpdateFunction = (param) =>{39        setStep(index,param)40    }41    var deleteButtonParams = {42        size: 'small',43        icon: 'trash',44        onClick: ()=>{deleteStep(index)},45        className: 'no-drag',46    }47    if (deleteDisabled){48        deleteButtonParams.disabled = true49    }else{...

generatePlotLineData.js

Source:generatePlotLineData.js

...18const _getXYPV = (step) => {19    return {x: step.volume, y: step.pressure}20}21const getEntropy = (step) => {22    if (hasDefinedKey(step,'staticEntropy')){23        return step.staticEntropy24    }25    return step.entropy26}27const _getXYST = (step) => {28    return {x: getEntropy(step), y: step.temperature}29}30function _getLinePointsST(steps,index,indexNext,system) {31    if (steps[index].type === 'isothermal' || steps[index].type === 'isentropic'){32        return[33            _getXYST(steps[index]), _getXYST(steps[indexNext])34        ]35    }36    const entropies = linspace(getEntropy(steps[index]),getEntropy(steps[indexNext]),100)...

index.js

Source:index.js

...7import { setPreset } from './actions/setPreset.js';8import undoable, { ActionCreators as UndoActionCreators } from 'redux-undo';9import { hasDefinedKey } from './Utils.js';10const store = createStore(undoable(thermodynamicSystemReducer,{groupBy: (action,currentState,previousHistory)=>{11  if (hasDefinedKey(action,'groupBy')){12    if (action.groupBy === null){return null}13    return `${action.groupBy.index}-${action.groupBy.xkey}`14  }15  return null16}}))17store.dispatch(setPreset('carnotCycle'))18store.dispatch(UndoActionCreators.clearHistory())19ReactDOM.render(20  <Provider store={store}>21    <App />22  </Provider>23  ,24  document.getElementById('root')25);

Jest Testing Tutorial

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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.
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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.