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Edit File: from-spec.js
"use strict"; var __generator = (this && this.__generator) || function (thisArg, body) { var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g; return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g; function verb(n) { return function (v) { return step([n, v]); }; } function step(op) { if (f) throw new TypeError("Generator is already executing."); while (_) try { if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t; if (y = 0, t) op = [op[0] & 2, t.value]; switch (op[0]) { case 0: case 1: t = op; break; case 4: _.label++; return { value: op[1], done: false }; case 5: _.label++; y = op[1]; op = [0]; continue; case 7: op = _.ops.pop(); _.trys.pop(); continue; default: if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; } if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; } if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; } if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; } if (t[2]) _.ops.pop(); _.trys.pop(); continue; } op = body.call(thisArg, _); } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; } if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true }; } }; var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); } var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) { if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); var g = generator.apply(thisArg, _arguments || []), i, q = []; return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i; function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; } function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } } function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); } function fulfill(value) { resume("next", value); } function reject(value) { resume("throw", value); } function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); } }; var __values = (this && this.__values) || function(o) { var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0; if (m) return m.call(o); if (o && typeof o.length === "number") return { next: function () { if (o && i >= o.length) o = void 0; return { value: o && o[i++], done: !o }; } }; throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined."); }; var __read = (this && this.__read) || function (o, n) { var m = typeof Symbol === "function" && o[Symbol.iterator]; if (!m) return o; var i = m.call(o), r, ar = [], e; try { while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value); } catch (error) { e = { error: error }; } finally { try { if (r && !r.done && (m = i["return"])) m.call(i); } finally { if (e) throw e.error; } } return ar; }; var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) { if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) { if (ar || !(i in from)) { if (!ar) ar = Array.prototype.slice.call(from, 0, i); ar[i] = from[i]; } } return to.concat(ar || Array.prototype.slice.call(from)); }; Object.defineProperty(exports, "__esModule", { value: true }); var chai_1 = require("chai"); var testing_1 = require("rxjs/testing"); var rxjs_1 = require("rxjs"); var operators_1 = require("rxjs/operators"); var web_streams_polyfill_1 = require("web-streams-polyfill"); var observableMatcher_1 = require("../helpers/observableMatcher"); function getArguments() { var args = []; for (var _i = 0; _i < arguments.length; _i++) { args[_i] = arguments[_i]; } return arguments; } describe('from', function () { var e_1, _a; var rxTestScheduler; beforeEach(function () { rxTestScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher); }); it('should create an observable from an array', function () { rxTestScheduler.run(function (_a) { var expectObservable = _a.expectObservable, time = _a.time; var delayTime = time('--|'); var expected = 'x-y-(z|)'; var e1 = (0, rxjs_1.from)([10, 20, 30]).pipe((0, operators_1.concatMap)(function (x, i) { return (0, rxjs_1.of)(x).pipe((0, operators_1.delay)(i === 0 ? 0 : delayTime)); })); expectObservable(e1).toBe(expected, { x: 10, y: 20, z: 30 }); }); }); it('should throw for non observable object', function () { var r = function () { (0, rxjs_1.from)({}).subscribe(); }; (0, chai_1.expect)(r).to.throw(); }); it('should finalize an AsyncGenerator', function (done) { var results = []; var sideEffects = []; function gen() { return __asyncGenerator(this, arguments, function gen_1() { var i; return __generator(this, function (_a) { switch (_a.label) { case 0: _a.trys.push([0, , 6, 7]); i = 0; _a.label = 1; case 1: if (!true) return [3, 5]; sideEffects.push(i); return [4, __await(i++)]; case 2: return [4, __await.apply(void 0, [_a.sent()])]; case 3: return [4, _a.sent()]; case 4: _a.sent(); return [3, 1]; case 5: return [3, 7]; case 6: results.push('finalized generator'); return [7]; case 7: return [2]; } }); }); } var source = (0, rxjs_1.from)(gen()).pipe((0, operators_1.take)(3)); source.subscribe({ next: function (value) { return results.push(value); }, complete: function () { results.push('done'); setTimeout(function () { (0, chai_1.expect)(sideEffects).to.deep.equal([0, 1, 2]); (0, chai_1.expect)(results).to.deep.equal([0, 1, 2, 'done', 'finalized generator']); done(); }); }, }); }); it('should finalize an AsyncGenerator on error', function (done) { var results = []; var sideEffects = []; function gen() { return __asyncGenerator(this, arguments, function gen_2() { var i; return __generator(this, function (_a) { switch (_a.label) { case 0: _a.trys.push([0, , 6, 7]); i = 0; _a.label = 1; case 1: if (!true) return [3, 5]; sideEffects.push(i); return [4, __await(i++)]; case 2: return [4, __await.apply(void 0, [_a.sent()])]; case 3: return [4, _a.sent()]; case 4: _a.sent(); return [3, 1]; case 5: return [3, 7]; case 6: results.push('finalized generator'); return [7]; case 7: return [2]; } }); }); } var source = (0, rxjs_1.from)(gen()).pipe((0, operators_1.tap)({ next: function (value) { if (value === 2) { throw new Error('weee'); } }, })); source.subscribe({ next: function (value) { return results.push(value); }, error: function () { results.push('in error'); setTimeout(function () { (0, chai_1.expect)(sideEffects).to.deep.equal([0, 1, 2]); (0, chai_1.expect)(results).to.deep.equal([0, 1, 'in error', 'finalized generator']); done(); }); }, }); }); it('should finalize an AsyncGenerator on unsubscribe', function (done) { var results = []; var sideEffects = []; var subscription; function gen() { return __asyncGenerator(this, arguments, function gen_3() { var i; return __generator(this, function (_a) { switch (_a.label) { case 0: _a.trys.push([0, , 6, 7]); i = 0; _a.label = 1; case 1: if (!true) return [3, 5]; sideEffects.push(i); return [4, __await(i++)]; case 2: return [4, __await.apply(void 0, [_a.sent()])]; case 3: return [4, _a.sent()]; case 4: _a.sent(); if (i === 2) { subscription.unsubscribe(); } return [3, 1]; case 5: return [3, 7]; case 6: results.push('finalized generator'); (0, chai_1.expect)(sideEffects).to.deep.equal([0, 1, 2]); (0, chai_1.expect)(results).to.deep.equal([0, 1, 'finalized generator']); done(); return [7]; case 7: return [2]; } }); }); } var source = (0, rxjs_1.from)(gen()); subscription = source.subscribe(function (value) { return results.push(value); }); }); it('should finalize a generator', function () { var results = []; function gen() { var i; return __generator(this, function (_a) { switch (_a.label) { case 0: _a.trys.push([0, , 4, 5]); i = 0; _a.label = 1; case 1: if (!true) return [3, 3]; return [4, i++]; case 2: _a.sent(); return [3, 1]; case 3: return [3, 5]; case 4: results.push('finalized generator'); return [7]; case 5: return [2]; } }); } var source = (0, rxjs_1.from)(gen()).pipe((0, operators_1.take)(3)); source.subscribe({ next: function (value) { return results.push(value); }, complete: function () { return results.push('done'); }, }); (0, chai_1.expect)(results).to.deep.equal([0, 1, 2, 'done', 'finalized generator']); }); var fakervable = function () { var _a; var values = []; for (var _i = 0; _i < arguments.length; _i++) { values[_i] = arguments[_i]; } return (_a = {}, _a[rxjs_1.observable] = function () { return ({ subscribe: function (observer) { var e_2, _a; try { for (var values_1 = __values(values), values_1_1 = values_1.next(); !values_1_1.done; values_1_1 = values_1.next()) { var value = values_1_1.value; observer.next(value); } } catch (e_2_1) { e_2 = { error: e_2_1 }; } finally { try { if (values_1_1 && !values_1_1.done && (_a = values_1.return)) _a.call(values_1); } finally { if (e_2) throw e_2.error; } } observer.complete(); }, }); }, _a); }; var fakeArrayObservable = function () { var values = []; for (var _i = 0; _i < arguments.length; _i++) { values[_i] = arguments[_i]; } var arr = ['bad array!']; arr[rxjs_1.observable] = function () { return { subscribe: function (observer) { var e_3, _a; try { for (var values_2 = __values(values), values_2_1 = values_2.next(); !values_2_1.done; values_2_1 = values_2.next()) { var value = values_2_1.value; observer.next(value); } } catch (e_3_1) { e_3 = { error: e_3_1 }; } finally { try { if (values_2_1 && !values_2_1.done && (_a = values_2.return)) _a.call(values_2); } finally { if (e_3) throw e_3.error; } } observer.complete(); }, }; }; return arr; }; var fakerator = function () { var _a; var values = []; for (var _i = 0; _i < arguments.length; _i++) { values[_i] = arguments[_i]; } return (_a = {}, _a[Symbol.iterator] = function () { var clone = __spreadArray([], __read(values), false); return { next: function () { return ({ done: clone.length <= 0, value: clone.shift(), }); }, }; }, _a); }; var sources = [ { name: 'observable', createValue: function () { return (0, rxjs_1.of)('x'); } }, { name: 'observable-like', createValue: function () { return fakervable('x'); } }, { name: 'observable-like-array', createValue: function () { return fakeArrayObservable('x'); } }, { name: 'array', createValue: function () { return ['x']; } }, { name: 'promise', createValue: function () { return Promise.resolve('x'); } }, { name: 'iterator', createValue: function () { return fakerator('x'); } }, { name: 'array-like', createValue: function () { var _a; return (_a = {}, _a[0] = 'x', _a.length = 1, _a); } }, { name: 'readable-stream-like', createValue: function () { return new web_streams_polyfill_1.ReadableStream({ pull: function (controller) { controller.enqueue('x'); controller.close(); }, }); }, }, { name: 'string', createValue: function () { return 'x'; } }, { name: 'arguments', createValue: function () { return getArguments('x'); } }, ]; if (Symbol && Symbol.asyncIterator) { var fakeAsyncIterator_1 = function () { var _a; var values = []; for (var _i = 0; _i < arguments.length; _i++) { values[_i] = arguments[_i]; } return _a = {}, _a[Symbol.asyncIterator] = function () { var _a; var i = 0; return _a = { next: function () { var index = i++; if (index < values.length) { return Promise.resolve({ done: false, value: values[index] }); } else { return Promise.resolve({ done: true }); } } }, _a[Symbol.asyncIterator] = function () { return this; }, _a; }, _a; }; sources.push({ name: 'async-iterator', createValue: function () { return fakeAsyncIterator_1('x'); }, }); } var _loop_1 = function (source) { it("should accept ".concat(source.name), function (done) { var nextInvoked = false; (0, rxjs_1.from)(source.createValue()).subscribe({ next: function (x) { nextInvoked = true; (0, chai_1.expect)(x).to.equal('x'); }, error: function (x) { done(new Error('should not be called')); }, complete: function () { (0, chai_1.expect)(nextInvoked).to.equal(true); done(); }, }); }); it("should accept ".concat(source.name, " and scheduler"), function (done) { var nextInvoked = false; (0, rxjs_1.from)(source.createValue(), rxjs_1.asyncScheduler).subscribe({ next: function (x) { nextInvoked = true; (0, chai_1.expect)(x).to.equal('x'); }, error: function (x) { done(new Error('should not be called')); }, complete: function () { (0, chai_1.expect)(nextInvoked).to.equal(true); done(); }, }); (0, chai_1.expect)(nextInvoked).to.equal(false); }); it("should accept a function that implements [Symbol.observable]", function (done) { var subject = new rxjs_1.Subject(); var handler = function (arg) { return subject.next(arg); }; handler[rxjs_1.observable] = function () { return subject; }; var nextInvoked = false; (0, rxjs_1.from)(handler) .pipe((0, operators_1.first)()) .subscribe({ next: function (x) { nextInvoked = true; (0, chai_1.expect)(x).to.equal('x'); }, error: function (x) { done(new Error('should not be called')); }, complete: function () { (0, chai_1.expect)(nextInvoked).to.equal(true); done(); }, }); handler('x'); }); it('should accept a thennable that happens to have a subscribe method', function (done) { var input = Promise.resolve('test'); input.subscribe = rxjs_1.noop; (0, rxjs_1.from)(input).subscribe({ next: function (x) { (0, chai_1.expect)(x).to.equal('test'); done(); }, }); }); }; try { for (var sources_1 = __values(sources), sources_1_1 = sources_1.next(); !sources_1_1.done; sources_1_1 = sources_1.next()) { var source = sources_1_1.value; _loop_1(source); } } catch (e_1_1) { e_1 = { error: e_1_1 }; } finally { try { if (sources_1_1 && !sources_1_1.done && (_a = sources_1.return)) _a.call(sources_1); } finally { if (e_1) throw e_1.error; } } it('should appropriately handle errors from an iterator', function () { var erroringIterator = (function () { var i; return __generator(this, function (_a) { switch (_a.label) { case 0: i = 0; _a.label = 1; case 1: if (!(i < 5)) return [3, 4]; if (i === 3) { throw new Error('bad'); } return [4, i]; case 2: _a.sent(); _a.label = 3; case 3: i++; return [3, 1]; case 4: return [2]; } }); })(); var results = []; (0, rxjs_1.from)(erroringIterator).subscribe({ next: function (x) { return results.push(x); }, error: function (err) { return results.push(err.message); }, }); (0, chai_1.expect)(results).to.deep.equal([0, 1, 2, 'bad']); }); it('should execute the finally block of a generator', function () { var finallyExecuted = false; var generator = (function () { return __generator(this, function (_a) { switch (_a.label) { case 0: _a.trys.push([0, , 2, 3]); return [4, 'hi']; case 1: _a.sent(); return [3, 3]; case 2: finallyExecuted = true; return [7]; case 3: return [2]; } }); })(); (0, rxjs_1.from)(generator).subscribe(); (0, chai_1.expect)(finallyExecuted).to.be.true; }); it('should support ReadableStream-like objects', function (done) { var input = [0, 1, 2]; var output = []; var readableStream = new web_streams_polyfill_1.ReadableStream({ pull: function (controller) { if (input.length > 0) { controller.enqueue(input.shift()); if (input.length === 0) { controller.close(); } } }, }); (0, rxjs_1.from)(readableStream).subscribe({ next: function (value) { output.push(value); (0, chai_1.expect)(readableStream.locked).to.equal(true); }, complete: function () { (0, chai_1.expect)(output).to.deep.equal([0, 1, 2]); (0, chai_1.expect)(readableStream.locked).to.equal(false); done(); }, }); }); it('should lock and release ReadableStream-like objects', function (done) { var input = [0, 1, 2]; var output = []; var readableStream = new web_streams_polyfill_1.ReadableStream({ pull: function (controller) { if (input.length > 0) { controller.enqueue(input.shift()); if (input.length === 0) { controller.close(); } } }, }); (0, rxjs_1.from)(readableStream).subscribe({ next: function (value) { output.push(value); (0, chai_1.expect)(readableStream.locked).to.equal(true); }, complete: function () { (0, chai_1.expect)(output).to.deep.equal([0, 1, 2]); (0, chai_1.expect)(readableStream.locked).to.equal(false); done(); }, }); }); }); 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