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Edit File: BehaviorSubject-spec.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var chai_1 = require("chai");
var rxjs_1 = require("rxjs");
var operators_1 = require("rxjs/operators");
var interop_helper_1 = require("../helpers/interop-helper");
var testing_1 = require("rxjs/testing");
var observableMatcher_1 = require("../helpers/observableMatcher");
describe('BehaviorSubject', function () {
    var testScheduler;
    beforeEach(function () {
        testScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should extend Subject', function () {
        var subject = new rxjs_1.BehaviorSubject(null);
        (0, chai_1.expect)(subject).to.be.instanceof(rxjs_1.Subject);
    });
    it('should throw if it has received an error and getValue() is called', function () {
        var subject = new rxjs_1.BehaviorSubject(null);
        subject.error(new Error('derp'));
        (0, chai_1.expect)(function () {
            subject.getValue();
        }).to.throw(Error, 'derp');
    });
    it('should throw an ObjectUnsubscribedError if getValue() is called and the BehaviorSubject has been unsubscribed', function () {
        var subject = new rxjs_1.BehaviorSubject('hi there');
        subject.unsubscribe();
        (0, chai_1.expect)(function () {
            subject.getValue();
        }).to.throw(rxjs_1.ObjectUnsubscribedError);
    });
    it('should have a getValue() method to retrieve the current value', function () {
        var subject = new rxjs_1.BehaviorSubject('staltz');
        (0, chai_1.expect)(subject.getValue()).to.equal('staltz');
        subject.next('oj');
        (0, chai_1.expect)(subject.getValue()).to.equal('oj');
    });
    it('should not allow you to set `value` directly', function () {
        var subject = new rxjs_1.BehaviorSubject('flibberty');
        try {
            subject.value = 'jibbets';
        }
        catch (e) {
        }
        (0, chai_1.expect)(subject.getValue()).to.equal('flibberty');
        (0, chai_1.expect)(subject.value).to.equal('flibberty');
    });
    it('should still allow you to retrieve the value from the value property', function () {
        var subject = new rxjs_1.BehaviorSubject('fuzzy');
        (0, chai_1.expect)(subject.value).to.equal('fuzzy');
        subject.next('bunny');
        (0, chai_1.expect)(subject.value).to.equal('bunny');
    });
    it('should start with an initialization value', function (done) {
        var subject = new rxjs_1.BehaviorSubject('foo');
        var expected = ['foo', 'bar'];
        var i = 0;
        subject.subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(expected[i++]);
            },
            complete: done,
        });
        subject.next('bar');
        subject.complete();
    });
    it('should pump values to multiple subscribers', function (done) {
        var subject = new rxjs_1.BehaviorSubject('init');
        var expected = ['init', 'foo', 'bar'];
        var i = 0;
        var j = 0;
        subject.subscribe(function (x) {
            (0, chai_1.expect)(x).to.equal(expected[i++]);
        });
        subject.subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(expected[j++]);
            },
            complete: done,
        });
        (0, chai_1.expect)(subject.observers.length).to.equal(2);
        subject.next('foo');
        subject.next('bar');
        subject.complete();
    });
    it('should not pass values nexted after a complete', function () {
        var subject = new rxjs_1.BehaviorSubject('init');
        var results = [];
        subject.subscribe(function (x) {
            results.push(x);
        });
        (0, chai_1.expect)(results).to.deep.equal(['init']);
        subject.next('foo');
        (0, chai_1.expect)(results).to.deep.equal(['init', 'foo']);
        subject.complete();
        (0, chai_1.expect)(results).to.deep.equal(['init', 'foo']);
        subject.next('bar');
        (0, chai_1.expect)(results).to.deep.equal(['init', 'foo']);
    });
    it('should clean out unsubscribed subscribers', function (done) {
        var subject = new rxjs_1.BehaviorSubject('init');
        var sub1 = subject.subscribe(function (x) {
            (0, chai_1.expect)(x).to.equal('init');
        });
        var sub2 = subject.subscribe(function (x) {
            (0, chai_1.expect)(x).to.equal('init');
        });
        (0, chai_1.expect)(subject.observers.length).to.equal(2);
        sub1.unsubscribe();
        (0, chai_1.expect)(subject.observers.length).to.equal(1);
        sub2.unsubscribe();
        (0, chai_1.expect)(subject.observers.length).to.equal(0);
        done();
    });
    it('should replay the previous value when subscribed', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable;
            var behaviorSubject = new rxjs_1.BehaviorSubject('0');
            function feedNextIntoSubject(x) {
                behaviorSubject.next(x);
            }
            function feedErrorIntoSubject(err) {
                behaviorSubject.error(err);
            }
            function feedCompleteIntoSubject() {
                behaviorSubject.complete();
            }
            var sourceTemplate = ' -1-2-3----4------5-6---7--8----9--|';
            var subscriber1 = hot('------(a|)                         ').pipe((0, operators_1.mergeMapTo)(behaviorSubject));
            var unsub1 = '         ---------------------!             ';
            var expected1 = '      ------3---4------5-6--             ';
            var subscriber2 = hot('------------(b|)                   ').pipe((0, operators_1.mergeMapTo)(behaviorSubject));
            var unsub2 = '         -------------------------!         ';
            var expected2 = '      ------------4----5-6---7--         ';
            var subscriber3 = hot('---------------------------(c|)    ').pipe((0, operators_1.mergeMapTo)(behaviorSubject));
            var expected3 = '      ---------------------------8---9--|';
            expectObservable(hot(sourceTemplate).pipe((0, operators_1.tap)({ next: feedNextIntoSubject, error: feedErrorIntoSubject, complete: feedCompleteIntoSubject }))).toBe(sourceTemplate);
            expectObservable(subscriber1, unsub1).toBe(expected1);
            expectObservable(subscriber2, unsub2).toBe(expected2);
            expectObservable(subscriber3).toBe(expected3);
        });
    });
    it('should emit complete when subscribed after completed', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable;
            var behaviorSubject = new rxjs_1.BehaviorSubject('0');
            function feedNextIntoSubject(x) {
                behaviorSubject.next(x);
            }
            function feedErrorIntoSubject(err) {
                behaviorSubject.error(err);
            }
            function feedCompleteIntoSubject() {
                behaviorSubject.complete();
            }
            var sourceTemplate = ' -1-2-3--4--|       ';
            var subscriber1 = hot('---------------(a|)').pipe((0, operators_1.mergeMapTo)(behaviorSubject));
            var expected1 = '      ---------------|   ';
            expectObservable(hot(sourceTemplate).pipe((0, operators_1.tap)({ next: feedNextIntoSubject, error: feedErrorIntoSubject, complete: feedCompleteIntoSubject }))).toBe(sourceTemplate);
            expectObservable(subscriber1).toBe(expected1);
        });
    });
    it('should be an Observer which can be given to Observable.subscribe', function (done) {
        var source = (0, rxjs_1.of)(1, 2, 3, 4, 5);
        var subject = new rxjs_1.BehaviorSubject(0);
        var expected = [0, 1, 2, 3, 4, 5];
        subject.subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(expected.shift());
            },
            error: function (x) {
                done(new Error('should not be called'));
            },
            complete: function () {
                (0, chai_1.expect)(subject.value).to.equal(5);
                done();
            },
        });
        source.subscribe(subject);
    });
    it('should be an Observer which can be given to an interop source', function (done) {
        var source = (0, rxjs_1.of)(1, 2, 3, 4, 5);
        var subject = new rxjs_1.BehaviorSubject(0);
        var expected = [0, 1, 2, 3, 4, 5];
        subject.subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(expected.shift());
            },
            error: function (x) {
                done(new Error('should not be called'));
            },
            complete: function () {
                (0, chai_1.expect)(subject.value).to.equal(5);
                done();
            },
        });
        source.subscribe((0, interop_helper_1.asInteropSubject)(subject));
    });
});
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