How to use isGeneratorFunction method in Jest

Best JavaScript code snippet using jest

index.js

Source:index.js Github

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...24 new Date()25 ];26 t.plan(nonFuncs.length);27 forEach(nonFuncs, function (nonFunc) {28 t.notOk(isGeneratorFunction(nonFunc), nonFunc + ' is not a function');29 });30 t.end();31});32test('returns false for non-generator functions', function (t) {33 var func = function () {};34 t.notOk(isGeneratorFunction(func), 'anonymous function is not an generator function');35 var namedFunc = function foo() {};36 t.notOk(isGeneratorFunction(namedFunc), 'named function is not an generator function');37 if (typeof window === 'undefined') {38 t.skip('window.alert is not an generator function');39 } else {40 t.notOk(isGeneratorFunction(window.alert), 'window.alert is not an generator function');41 }42 t.end();43});44test('returns false for non-generator function with faked toString', function (t) {45 var func = function () {};46 func.toString = function () { return 'function* () { return "TOTALLY REAL I SWEAR!"; }'; };47 t.notEqual(String(func), Function.prototype.toString.apply(func), 'faked toString is not real toString');48 t.notOk(isGeneratorFunction(func), 'anonymous function with faked toString is not a generator function');49 t.end();50});51test('returns false for non-generator function with faked @@toStringTag', { skip: !hasToStringTag }, function (t) {52 var fakeGenFunction = {53 toString: function () { return String(generatorFunc); },54 valueOf: function () { return generatorFunc; }55 };56 fakeGenFunction[Symbol.toStringTag] = 'GeneratorFunction';57 t.notOk(isGeneratorFunction(fakeGenFunction), 'fake GeneratorFunction with @@toStringTag "GeneratorFunction" is not a generator function');58 t.end();59});60test('returns true for generator functions', function (t) {61 if (generatorFunc) {62 t.ok(isGeneratorFunction(generatorFunc), 'generator function is generator function');63 } else {64 t.skip('generator function is generator function - this environment does not support ES6 generator functions. Please run `node --harmony`, or use a supporting browser.');65 }66 t.end();67});68test('concise methods', { skip: !generatorFunc || !generatorFunc.concise }, function (t) {69 t.test('returns true for concise generator methods', function (st) {70 st.ok(isGeneratorFunction(generatorFunc.concise), 'concise generator method is generator function');71 st.end();72 });73 t.test('returns false for concise non-generator methods', function (st) {74 var conciseMethod = Function('return { concise() {} }.concise;')();75 st.equal(typeof conciseMethod, 'function', 'assert: concise method exists');76 st.notOk(isGeneratorFunction(conciseMethod), 'concise non-generator method is not generator function');77 st.end();78 });79 t.end();...

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isAsyncFunction-isGeneratorFunction.js

Source:isAsyncFunction-isGeneratorFunction.js Github

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1// Debugger.Script.prototype.isAsyncFunction, Debugger.Object.prototype.isAsyncFunction,2// Debugger.Script.prototype.isGeneratorFunction, Debugger.Object.prototype.isGeneratorFunction3var g = newGlobal({newCompartment: true});4var dbg = new Debugger();5var gDO = dbg.addDebuggee(g);6g.non_debuggee = function non_debuggee () {}7function checkExpr(expr, { isAsync, isGenerator })8{9 print("Evaluating: " + uneval(expr));10 let completion = gDO.executeInGlobal(expr);11 if (completion.throw)12 throw completion.throw.unsafeDereference();13 let fn = completion.return;14 assertEq(fn.isAsyncFunction, isAsync);15 assertEq(fn.isGeneratorFunction, isGenerator);16 // The Debugger.Object and its Debugger.Script should always agree.17 if (fn.script) {18 assertEq(fn.isAsyncFunction, fn.script.isAsyncFunction);19 assertEq(fn.isGeneratorFunction, fn.script.isGeneratorFunction);20 }21}22checkExpr('({})', { isAsync: undefined, isGenerator: undefined });23checkExpr('non_debuggee', { isAsync: undefined, isGenerator: undefined });24checkExpr('(function(){})', { isAsync: false, isGenerator: false });25checkExpr('(function*(){})', { isAsync: false, isGenerator: true });26checkExpr('(async function snerf(){})', { isAsync: true, isGenerator: false });27checkExpr('(async function* omlu(){})', { isAsync: true, isGenerator: true });28checkExpr('new Function("1+2")', { isAsync: false, isGenerator: false });29checkExpr('Object.getPrototypeOf(function*(){}).constructor("1+2")',30 { isAsync: false, isGenerator: true });31checkExpr('Object.getPrototypeOf(async function(){}).constructor("1+2")',32 { isAsync: true, isGenerator: false });33checkExpr('Object.getPrototypeOf(async function*(){}).constructor("1+2")',34 { isAsync: true, isGenerator: true });35// Check eval scripts.36function checkFrame(expr, type)37{38 var log = '';39 dbg.onDebuggerStatement = function(frame) {40 log += 'd';41 assertEq(frame.type, type);42 assertEq(frame.script.isAsyncFunction, false);43 assertEq(frame.script.isGeneratorFunction, false);44 }45 gDO.executeInGlobal(expr);46 assertEq(log, 'd');47}48checkFrame('debugger;', 'global');...

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utils.test.js

Source:utils.test.js Github

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...4 function* gen() {}5 const obj = {6 *gen() {}7 };8 t.true(isGeneratorFunction(gen));9 t.true(isGeneratorFunction(obj.gen));10});11test('isGeneratorFunction is false for everything else', t => {12 function regular() {}13 const obj = {};14 const num = 1;15 const string = 'string';16 const array = [];17 t.false(isGeneratorFunction(regular));18 t.false(isGeneratorFunction(obj));19 t.false(isGeneratorFunction(num));20 t.false(isGeneratorFunction(string));21 t.false(isGeneratorFunction(array));22});23test('isIterable is true for built-in iterable types', t => {24 const array = [];25 const map = new Map();26 const set = new Set();27 const typedArray = new Int32Array();28 const string = 'string';29 t.true(isIterable(array));30 t.true(isIterable(map));31 t.true(isIterable(set));32 t.true(isIterable(typedArray));33 t.true(isIterable(string));34});35test('isIterable is true for custom iterables', t => {...

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isGeneratorFunction.test.js

Source:isGeneratorFunction.test.js Github

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...18 }19}20describe('isGeneratorFunction', () => {21 it('returns true on generator functions', () => {22 expect(isGeneratorFunction(naturals)).to.be.true23 expect(isGeneratorFunction(five)).to.be.true24 })25 it('returns false for generators', () => {26 expect(isGeneratorFunction(naturals())).to.be.false27 expect(isGeneratorFunction(five())).to.be.false28 })29 it('returns false for non-generator functions', () => {30 expect(isGeneratorFunction(() => {})).to.be.false31 expect(isGeneratorFunction(x => x)).to.be.false32 })33 it('returns false for non-functions', () => {34 expect(isGeneratorFunction(true)).to.be.false35 expect(isGeneratorFunction(0)).to.be.false36 expect(isGeneratorFunction('[object GeneratorFunction]')).to.be.false37 expect(isGeneratorFunction([])).to.be.false38 expect(isGeneratorFunction({})).to.be.false39 expect(isGeneratorFunction(Symbol('GeneratorFunction'))).to.be.false40 })...

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isGeneratorFunction.js

Source:isGeneratorFunction.js Github

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...6import genFunc from './shared/genFunc';7describe('isGeneratorFunction', function () {8 it('should tests value for a `Generator Function`', function () {9 assert.strictEqual(10 RA.isGeneratorFunction(genFunc),11 typeof genFunc === 'function'12 );13 assert.isFalse(RA.isGeneratorFunction(args));14 assert.isFalse(RA.isGeneratorFunction([1, 2, 3]));15 assert.isFalse(RA.isGeneratorFunction(true));16 assert.isFalse(RA.isGeneratorFunction(new Date()));17 assert.isFalse(RA.isGeneratorFunction(new Error()));18 assert.isFalse(RA.isGeneratorFunction(Array.prototype.slice));19 assert.isFalse(RA.isGeneratorFunction({ 0: 1, length: 1 }));20 assert.isFalse(RA.isGeneratorFunction(1));21 assert.isFalse(RA.isGeneratorFunction(/x/));22 assert.isFalse(RA.isGeneratorFunction(Symbol));23 });24 it('should support placeholder to specify "gaps"', function () {25 const isGeneratorFunction = RA.isGeneratorFunction(R.__);26 assert.strictEqual(27 isGeneratorFunction(genFunc),28 typeof genFunc === 'function'29 );30 });...

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test.js

Source:test.js Github

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1import test from 'ava';2import isGeneratorFunction from './index.js';3test('main', t => {4 t.true(isGeneratorFunction(function * () {}));5 t.true(isGeneratorFunction(function * () {6 yield 'unicorn';7 }));8 t.false(isGeneratorFunction(null));9 t.false(isGeneratorFunction(undefined));10 t.false(isGeneratorFunction(() => {}));11 t.false(isGeneratorFunction(''));...

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isGeneratorFunction.spec.js

Source:isGeneratorFunction.spec.js Github

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1const {isGeneratorFunction} = require('@/isGeneratorFunction');2describe('isGeneratorFunction', function () {3 it('truthy', function () {4 function* gen() {}5 const res = isGeneratorFunction(gen);6 expect(res).toBeTruthy();7 });...

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