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Do not rely on native setTimeout in the promise service tests. (#19891)
This commit is contained in:
Aleh Zasypkin
GitHub
parent
9dc9644e95
commit
8c2a8d25c1
1 changed files with 172 additions and 87 deletions
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@ -21,155 +21,234 @@ import expect from 'expect.js';
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import ngMock from 'ng_mock';
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import sinon from 'sinon';
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describe('Promise service', function () {
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describe('Promise service', () => {
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let Promise;
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let $rootScope;
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const sandbox = sinon.createSandbox();
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function tick(ms = 0) {
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sandbox.clock.tick(ms);
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// Ugly, but necessary for promises to resolve: https://github.com/angular/angular.js/issues/12555
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$rootScope.$apply();
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}
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beforeEach(ngMock.module('kibana'));
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beforeEach(ngMock.inject(function ($injector) {
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beforeEach(ngMock.inject(($injector) => {
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sandbox.useFakeTimers();
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Promise = $injector.get('Promise');
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$rootScope = $injector.get('$rootScope');
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}));
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describe('Constructor', function () {
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it('provides resolve and reject function', function () {
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new Promise(function (resolve, reject) {
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expect(resolve).to.be.a('function');
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expect(reject).to.be.a('function');
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expect(arguments).to.have.length(2);
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});
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afterEach(() => sandbox.restore());
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describe('Constructor', () => {
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it('provides resolve and reject function', () => {
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const executor = sinon.stub();
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new Promise(executor);
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sinon.assert.calledOnce(executor);
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sinon.assert.calledWithExactly(executor, sinon.match.func, sinon.match.func);
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});
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});
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it('Promise.resolve', function (done) {
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Promise.resolve(true).then(() => { done(); });
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// Ugly, but necessary for promises to resolve: https://github.com/angular/angular.js/issues/12555
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$rootScope.$apply();
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it('Promise.resolve', () => {
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const onResolve = sinon.stub();
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Promise.resolve(true).then(onResolve);
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tick();
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledWithExactly(onResolve, true);
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});
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describe('Promise.fromNode', function () {
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it('creates a callback that controls a promise', function () {
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let callback;
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Promise.fromNode(cb => (callback = cb)());
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$rootScope.$apply();
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expect(callback).to.be.a('function');
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describe('Promise.fromNode', () => {
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it('creates a callback that controls a promise', () => {
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const callback = sinon.stub();
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Promise.fromNode(callback);
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tick();
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sinon.assert.calledOnce(callback);
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sinon.assert.calledWithExactly(callback, sinon.match.func);
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});
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it('rejects if the callback receives an error', function () {
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const errback = sinon.stub();
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it('rejects if the callback receives an error', () => {
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const err = new Error();
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Promise.fromNode(cb => cb(err)).catch(errback);
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$rootScope.$apply();
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const onReject = sinon.stub();
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Promise.fromNode(sinon.stub().yields(err)).catch(onReject);
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expect(errback.callCount).to.be(1);
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expect(errback.getCall(0).args[0]).to.be(err);
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tick();
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sinon.assert.calledOnce(onReject);
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sinon.assert.calledWithExactly(onReject, sinon.match.same(err));
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});
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it('resolves with the second argument', function () {
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const thenback = sinon.stub();
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it('resolves with the second argument', () => {
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const result = {};
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Promise.fromNode(cb => cb(null, result)).then(thenback);
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$rootScope.$apply();
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const onResolve = sinon.stub();
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Promise.fromNode(sinon.stub().yields(null, result)).then(onResolve);
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expect(thenback.callCount).to.be(1);
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expect(thenback.getCall(0).args[0]).to.be(result);
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tick();
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledWithExactly(onResolve, sinon.match.same(result));
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});
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it('resolves with an array if multiple arguments are received', function () {
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const thenback = sinon.stub();
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it('resolves with an array if multiple arguments are received', () => {
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const result1 = {};
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const result2 = {};
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Promise.fromNode(cb => cb(null, result1, result2)).then(thenback);
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$rootScope.$apply();
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const onResolve = sinon.stub();
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Promise.fromNode(sinon.stub().yields(null, result1, result2)).then(onResolve);
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expect(thenback.callCount).to.be(1);
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expect(thenback.getCall(0).args[0][0]).to.be(result1);
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expect(thenback.getCall(0).args[0][1]).to.be(result2);
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tick();
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledWithExactly(
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onResolve,
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[sinon.match.same(result1), sinon.match.same(result2)]
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);
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});
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it('resolves with an array if multiple undefined are received', function () {
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const thenback = sinon.stub();
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Promise.fromNode(cb => cb(null, undefined, undefined)).then(thenback);
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$rootScope.$apply();
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it('resolves with an array if multiple undefined are received', () => {
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const onResolve = sinon.stub();
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Promise.fromNode(sinon.stub().yields(null, undefined, undefined)).then(onResolve);
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expect(thenback.callCount).to.be(1);
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expect(thenback.getCall(0).args[0][0]).to.be(undefined);
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expect(thenback.getCall(0).args[0][1]).to.be(undefined);
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tick();
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledWithExactly(onResolve, [undefined, undefined]);
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});
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});
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describe('Promise.race()', () => {
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let crankTimeout;
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beforeEach(() => {
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// constantly call $rootScope.$apply() in a loop so we can
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// pretend that these are real promises
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(function crank$apply() {
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$rootScope.$apply();
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crankTimeout = setTimeout(crank$apply, 1);
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}());
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});
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afterEach(() => {
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clearTimeout(crankTimeout);
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});
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it(`resolves with the first resolved promise's value`, async () => {
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it(`resolves with the first resolved promise's value`, () => {
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const p1 = new Promise(resolve => setTimeout(resolve, 100, 1));
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const p2 = new Promise(resolve => setTimeout(resolve, 200, 2));
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expect(await Promise.race([p1, p2])).to.be(1);
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const onResolve = sinon.stub();
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Promise.race([p1, p2]).then(onResolve);
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tick(200);
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledWithExactly(onResolve, 1);
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});
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it(`rejects with the first rejected promise's rejection reason`, async () => {
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const p1 = new Promise((r, reject) => setTimeout(reject, 200, new Error(1)));
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const p2 = new Promise((r, reject) => setTimeout(reject, 100, new Error(2)));
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expect(await Promise.race([p1, p2]).catch(e => e.message)).to.be('2');
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it(`rejects with the first rejected promise's rejection reason`, () => {
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const p1Error = new Error('1');
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const p1 = new Promise((r, reject) => setTimeout(reject, 200, p1Error));
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const p2Error = new Error('2');
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const p2 = new Promise((r, reject) => setTimeout(reject, 100, p2Error));
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const onReject = sinon.stub();
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Promise.race([p1, p2]).catch(onReject);
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tick(200);
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sinon.assert.calledOnce(onReject);
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sinon.assert.calledWithExactly(onReject, sinon.match.same(p2Error));
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});
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it('does not wait for subsequent promises to resolve/reject', async () => {
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const start = Date.now();
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const p1 = new Promise(resolve => setTimeout(resolve, 100));
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const p2 = new Promise(resolve => setTimeout(resolve, 5000));
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await Promise.race([p1, p2]);
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const time = Date.now() - start;
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expect(time).to.not.be.lessThan(100);
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expect(time).to.not.be.greaterThan(2000);
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it('does not wait for subsequent promises to resolve/reject', () => {
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const onP1Resolve = sinon.stub();
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const p1 = new Promise(resolve => setTimeout(resolve, 100)).then(onP1Resolve);
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const onP2Resolve = sinon.stub();
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const p2 = new Promise(resolve => setTimeout(resolve, 101)).then(onP2Resolve);
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const onResolve = sinon.stub();
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Promise.race([p1, p2]).then(onResolve);
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tick(100);
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledOnce(onP1Resolve);
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sinon.assert.callOrder(onP1Resolve, onResolve);
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sinon.assert.notCalled(onP2Resolve);
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});
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it('allows non-promises in the array', async () => {
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expect(await Promise.race([1, 2, 3])).to.be(1);
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it('allows non-promises in the array', () => {
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const onResolve = sinon.stub();
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Promise.race([1, 2, 3]).then(onResolve);
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tick();
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledWithExactly(onResolve, 1);
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});
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describe('argument is undefined', () => {
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it('rejects the promise', async () => {
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it('rejects the promise', () => {
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const football = {};
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expect(await Promise.race().catch(() => football)).to.be(football);
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const onReject = sinon.stub();
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Promise.race().catch(() => football).then(onReject);
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tick();
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sinon.assert.calledOnce(onReject);
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sinon.assert.calledWithExactly(onReject, sinon.match.same(football));
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});
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});
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describe('argument is a string', () => {
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it(`resolves with the first character`, async () => {
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expect(await Promise.race('abc')).to.be('a');
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it(`resolves with the first character`, () => {
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const onResolve = sinon.stub();
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Promise.race('abc').then(onResolve);
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tick();
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledWithExactly(onResolve, 'a');
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});
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});
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describe('argument is a non-iterable object', () => {
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it('reject the promise', async () => {
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it('reject the promise', () => {
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const football = {};
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expect(await Promise.race({}).catch(() => football)).to.be(football);
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const onReject = sinon.stub();
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Promise.race({}).catch(() => football).then(onReject);
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tick();
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sinon.assert.calledOnce(onReject);
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sinon.assert.calledWithExactly(onReject, sinon.match.same(football));
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});
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});
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describe('argument is a generator', () => {
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it('resolves with the first resolved value', async () => {
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it('resolves with the first resolved value', () => {
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function *gen() {
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yield new Promise(resolve => setTimeout(resolve, 100, 1));
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yield new Promise(resolve => setTimeout(resolve, 200, 2));
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}
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expect(await Promise.race(gen())).to.be(1);
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const onResolve = sinon.stub();
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Promise.race(gen()).then(onResolve);
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tick(200);
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledWithExactly(onResolve, 1);
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});
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it('resolves with the first non-promise value', async () => {
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it('resolves with the first non-promise value', () => {
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function *gen() {
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yield 1;
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yield new Promise(resolve => setTimeout(resolve, 200, 2));
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}
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expect(await Promise.race(gen())).to.be(1);
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const onResolve = sinon.stub();
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Promise.race(gen()).then(onResolve);
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tick(200);
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledWithExactly(onResolve, 1);
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});
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it('iterates all values from the generator, even if one is already "resolved"', async () => {
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it('iterates all values from the generator, even if one is already "resolved"', () => {
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let yieldCount = 0;
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function *gen() {
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yieldCount += 1;
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@ -178,7 +257,13 @@ describe('Promise service', function () {
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yield new Promise(resolve => setTimeout(resolve, 200, 2));
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}
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expect(await Promise.race(gen())).to.be(1);
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const onResolve = sinon.stub();
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Promise.race(gen()).then(onResolve);
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tick(200);
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sinon.assert.calledOnce(onResolve);
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sinon.assert.calledWithExactly(onResolve, 1);
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expect(yieldCount).to.be(2);
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});
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});
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