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Edit File: withLatestFrom-spec.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var chai_1 = require("chai");
var test_helper_1 = require("../helpers/test-helper");
var operators_1 = require("rxjs/operators");
var rxjs_1 = require("rxjs");
var testing_1 = require("rxjs/testing");
var observableMatcher_1 = require("../helpers/observableMatcher");
describe('withLatestFrom', function () {
    var rxTestScheduler;
    beforeEach(function () {
        rxTestScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should combine events from cold observables', function () {
        rxTestScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = cold(' --1--2-3-4---|   ');
            var e2subs = '  ^------------!   ';
            var e1 = cold(' -a--b-----c-d-e-|');
            var e1subs = '  ^---------------!';
            var expected = '----B-----C-D-E-|';
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, function (a, b) { return String(a) + String(b); }));
            expectObservable(result).toBe(expected, { B: 'b1', C: 'c4', D: 'd4', E: 'e4' });
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should merge the value with the latest values from the other observables into arrays', function () {
        rxTestScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = hot('  --e--^-f---g---h------|');
            var e2subs = '       ^-------------!   ';
            var e3 = hot('  --i--^-j---k---l------|');
            var e3subs = '       ^-------------!   ';
            var e1 = hot('  --a--^---b---c---d-|   ');
            var e1subs = '       ^-------------!   ';
            var expected = '     ----x---y---z-|   ';
            var values = {
                x: ['b', 'f', 'j'],
                y: ['c', 'g', 'k'],
                z: ['d', 'h', 'l'],
            };
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, e3));
            expectObservable(result).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should merge the value with the latest values from the other observables into arrays and a project argument', function () {
        rxTestScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = hot('  --e--^-f---g---h------|');
            var e2subs = '       ^-------------!   ';
            var e3 = hot('  --i--^-j---k---l------|');
            var e3subs = '       ^-------------!   ';
            var e1 = hot('  --a--^---b---c---d-|   ');
            var e1subs = '       ^-------------!   ';
            var expected = '     ----x---y---z-|   ';
            var values = {
                x: 'bfj',
                y: 'cgk',
                z: 'dhl',
            };
            var project = function (a, b, c) { return a + b + c; };
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, e3, project));
            expectObservable(result).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should allow unsubscribing early and explicitly', function () {
        rxTestScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = hot('  --e--^-f---g---h------|');
            var e2subs = '       ^----------!      ';
            var e3 = hot('  --i--^-j---k---l------|');
            var e3subs = '       ^----------!      ';
            var e1 = hot('  --a--^---b---c---d-|   ');
            var e1subs = '       ^----------!      ';
            var expected = '     ----x---y---      ';
            var unsub = '        -----------!      ';
            var values = {
                x: 'bfj',
                y: 'cgk',
                z: 'dhl',
            };
            var project = function (a, b, c) { return a + b + c; };
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, e3, project));
            expectObservable(result, unsub).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
        rxTestScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = hot('  --e--^-f---g---h------|');
            var e2subs = '       ^----------!      ';
            var e3 = hot('  --i--^-j---k---l------|');
            var e3subs = '       ^----------!      ';
            var e1 = hot('  --a--^---b---c---d-|   ');
            var e1subs = '       ^----------!      ';
            var expected = '     ----x---y---      ';
            var unsub = '        -----------!      ';
            var values = {
                x: 'bfj',
                y: 'cgk',
                z: 'dhl',
            };
            var project = function (a, b, c) { return a + b + c; };
            var result = e1.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.withLatestFrom)(e2, e3, project), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }));
            expectObservable(result, unsub).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should handle empty', function () {
        rxTestScheduler.run(function (_a) {
            var hot = _a.hot, cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = hot('  --e--^-f---g---h----|');
            var e2subs = '       (^!)            ';
            var e3 = hot('  --i--^-j---k---l----|');
            var e3subs = '       (^!)            ';
            var e1 = cold('      |               ');
            var e1subs = '       (^!)            ';
            var expected = '     |               ';
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, e3));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should handle never', function () {
        rxTestScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = hot('   --e--^-f---g---h----|  ');
            var e2subs = '        ^--------------!  ';
            var e3 = hot('   --i--^-j---k---l----|  ');
            var e3subs = '        ^--------------!  ';
            var e1 = cold('        -                ');
            var e1subs = '         ^----------------';
            var expected = '    --------------------';
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, e3));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should handle throw', function () {
        rxTestScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = hot('  --e--^-f---g---h----|');
            var e2subs = '       (^!)            ';
            var e3 = hot('  --i--^-j---k---l----|');
            var e3subs = '       (^!)            ';
            var e1 = cold('      #               ');
            var e1subs = '       (^!)            ';
            var expected = '     #               ';
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, e3));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should handle error', function () {
        rxTestScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = hot('  --e--^-f---g---h----|');
            var e2subs = '       ^-------!       ';
            var e3 = hot('  --i--^-j---k---l----|');
            var e3subs = '       ^-------!       ';
            var e1 = hot('  --a--^---b---#       ', undefined, new Error('boo-hoo'));
            var e1subs = '       ^-------!       ';
            var expected = '     ----x---#       ';
            var values = {
                x: ['b', 'f', 'j'],
            };
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, e3));
            expectObservable(result).toBe(expected, values, new Error('boo-hoo'));
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should handle error with project argument', function () {
        rxTestScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = hot('  --e--^-f---g---h----|');
            var e2subs = '       ^-------!       ';
            var e3 = hot('  --i--^-j---k---l----|');
            var e3subs = '       ^-------!       ';
            var e1 = hot('  --a--^---b---#       ', undefined, new Error('boo-hoo'));
            var e1subs = '       ^-------!       ';
            var expected = '     ----x---#       ';
            var values = {
                x: 'bfj',
            };
            var project = function (a, b, c) { return a + b + c; };
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, e3, project));
            expectObservable(result).toBe(expected, values, new Error('boo-hoo'));
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should handle merging with empty', function () {
        rxTestScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = cold('      |                 ');
            var e2subs = '       (^!)              ';
            var e3 = hot('  --i--^-j---k---l------|');
            var e3subs = '       ^-------------!   ';
            var e1 = hot('  --a--^---b---c---d-|   ');
            var e1subs = '       ^-------------!   ';
            var expected = '     --------------|   ';
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, e3));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should handle merging with never', function () {
        rxTestScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e2 = cold('      -                 ');
            var e2subs = '       ^-------------!   ';
            var e3 = hot('  --i--^-j---k---l------|');
            var e3subs = '       ^-------------!   ';
            var e1 = hot('  --a--^---b---c---d-|   ');
            var e1subs = '       ^-------------!   ';
            var expected = '     --------------|   ';
            var result = e1.pipe((0, operators_1.withLatestFrom)(e2, e3));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
            expectSubscriptions(e3.subscriptions).toBe(e3subs);
        });
    });
    it('should handle promises', function (done) {
        (0, rxjs_1.of)(1)
            .pipe((0, operators_1.delay)(1), (0, operators_1.withLatestFrom)(Promise.resolve(2), Promise.resolve(3)))
            .subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.deep.equal([1, 2, 3]);
            },
            complete: done,
        });
    });
    it('should handle arrays', function () {
        (0, rxjs_1.of)(1)
            .pipe((0, operators_1.delay)(1), (0, operators_1.withLatestFrom)([2, 3, 4], [4, 5, 6]))
            .subscribe(function (x) {
            (0, chai_1.expect)(x).to.deep.equal([1, 4, 6]);
        });
    });
    it('should handle lowercase-o observables', function () {
        (0, rxjs_1.of)(1)
            .pipe((0, operators_1.delay)(1), (0, operators_1.withLatestFrom)((0, test_helper_1.lowerCaseO)(2, 3, 4), (0, test_helper_1.lowerCaseO)(4, 5, 6)))
            .subscribe(function (x) {
            (0, chai_1.expect)(x).to.deep.equal([1, 4, 6]);
        });
    });
    it('should work with synchronous observables', function () {
        var result = [];
        (0, rxjs_1.of)(1, 2, 3)
            .pipe((0, operators_1.withLatestFrom)((0, rxjs_1.of)(4, 5)))
            .subscribe(function (x) {
            result.push(x);
        });
        (0, chai_1.expect)(result.length).to.equal(3);
        (0, chai_1.expect)(result[0]).to.deep.equal([1, 5]);
        (0, chai_1.expect)(result[1]).to.deep.equal([2, 5]);
        (0, chai_1.expect)(result[2]).to.deep.equal([3, 5]);
    });
});
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