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Edit File: repeatWhen-spec.js

"use strict";
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 operators_1 = require("rxjs/operators");
var rxjs_1 = require("rxjs");
var Subscriber_1 = require("rxjs/internal/Subscriber");
var testing_1 = require("rxjs/testing");
var observableMatcher_1 = require("../helpers/observableMatcher");
describe('repeatWhen operator', function () {
    var testScheduler;
    beforeEach(function () {
        testScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should handle a source with eventual complete using a hot notifier', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('-1--2--|');
            var subs = [
                '                  ^------!                          ',
                '                  -------------^------!             ',
                '                  --------------------------^------!',
            ];
            var notifier = hot('-------------r------------r-|    ');
            var expected = '    -1--2---------1--2---------1--2--|';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should handle a source with eventual complete using a hot notifier that raises error', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold(' -1--2--|');
            var subs = [
                '                   ^------!                      ',
                '                   -----------^------!           ',
                '                   -------------------^------!   ',
            ];
            var notifier = hot('-----------r-------r---------#');
            var expected = '    -1--2-------1--2----1--2-----#';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should repeat when notified via returned notifier on complete', function (done) {
        var retried = false;
        var expected = [1, 2, 1, 2];
        var i = 0;
        try {
            (0, rxjs_1.of)(1, 2)
                .pipe((0, operators_1.map)(function (n) {
                return n;
            }), (0, operators_1.repeatWhen)(function (notifications) {
                return notifications.pipe((0, operators_1.map)(function (x) {
                    if (retried) {
                        throw new Error('done');
                    }
                    retried = true;
                    return x;
                }));
            }))
                .subscribe({
                next: function (x) {
                    (0, chai_1.expect)(x).to.equal(expected[i++]);
                },
                error: function (err) {
                    (0, chai_1.expect)(err).to.be.an('error', 'done');
                    done();
                },
            });
        }
        catch (err) {
            done(err);
        }
    });
    it('should not repeat when applying an empty notifier', function (done) {
        var expected = [1, 2];
        var nexted = [];
        (0, rxjs_1.of)(1, 2)
            .pipe((0, operators_1.map)(function (n) {
            return n;
        }), (0, operators_1.repeatWhen)(function (notifications) { return rxjs_1.EMPTY; }))
            .subscribe({
            next: function (n) {
                (0, chai_1.expect)(n).to.equal(expected.shift());
                nexted.push(n);
            },
            error: function (err) {
                done(new Error('should not be called'));
            },
            complete: function () {
                (0, chai_1.expect)(nexted).to.deep.equal([1, 2]);
                done();
            },
        });
    });
    it('should not error when applying an empty synchronous notifier', function () {
        var errors = [];
        var originalSubscribe = rxjs_1.Observable.prototype.subscribe;
        rxjs_1.Observable.prototype.subscribe = function () {
            var args = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                args[_i] = arguments[_i];
            }
            var _a = __read(args, 1), subscriber = _a[0];
            if (!(subscriber instanceof rxjs_1.Subscriber)) {
                subscriber = new (Subscriber_1.SafeSubscriber.bind.apply(Subscriber_1.SafeSubscriber, __spreadArray([void 0], __read(args), false)))();
            }
            subscriber.error = function (err) {
                errors.push(err);
                rxjs_1.Subscriber.prototype.error.call(this, err);
            };
            return originalSubscribe.call(this, subscriber);
        };
        (0, rxjs_1.of)(1, 2)
            .pipe((0, operators_1.repeatWhen)(function (notifications) { return rxjs_1.EMPTY; }))
            .subscribe({ error: function (err) { return errors.push(err); } });
        rxjs_1.Observable.prototype.subscribe = originalSubscribe;
        (0, chai_1.expect)(errors).to.deep.equal([]);
    });
    it('should not error when applying a non-empty synchronous notifier', function () {
        var errors = [];
        var originalSubscribe = rxjs_1.Observable.prototype.subscribe;
        rxjs_1.Observable.prototype.subscribe = function () {
            var args = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                args[_i] = arguments[_i];
            }
            var _a = __read(args, 1), subscriber = _a[0];
            if (!(subscriber instanceof rxjs_1.Subscriber)) {
                subscriber = new (Subscriber_1.SafeSubscriber.bind.apply(Subscriber_1.SafeSubscriber, __spreadArray([void 0], __read(args), false)))();
            }
            subscriber.error = function (err) {
                errors.push(err);
                rxjs_1.Subscriber.prototype.error.call(this, err);
            };
            return originalSubscribe.call(this, subscriber);
        };
        (0, rxjs_1.of)(1, 2)
            .pipe((0, operators_1.repeatWhen)(function (notifications) { return (0, rxjs_1.of)(1); }))
            .subscribe({ error: function (err) { return errors.push(err); } });
        rxjs_1.Observable.prototype.subscribe = originalSubscribe;
        (0, chai_1.expect)(errors).to.deep.equal([]);
    });
    it('should apply an empty notifier on an empty source', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('  |   ');
            var subs = '         (^!)';
            var notifier = cold('|   ');
            var expected = '     |   ';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should apply a never notifier on an empty source', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('  |   ');
            var subs = '         (^!)';
            var notifier = cold('-   ');
            var expected = '     -   ';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should apply an empty notifier on a never source', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('  -                                         ');
            var unsub = '        -----------------------------------------!';
            var subs = '         ^----------------------------------------!';
            var notifier = cold('|                                         ');
            var expected = '     -                                         ';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should apply a never notifier on a never source', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('  -                                         ');
            var unsub = '        -----------------------------------------!';
            var subs = '         ^----------------------------------------!';
            var notifier = cold('-                                        ');
            var expected = '     -                                        ';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should return an empty observable given a just-throw source and empty notifier', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable;
            var source = cold('  #');
            var notifier = cold('|');
            var expected = '     #';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
        });
    });
    it('should return a error observable given a just-throw source and never notifier', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable;
            var source = cold('  #');
            var notifier = cold('-');
            var expected = '     #';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
        });
    });
    it('should return a never-ending result if the notifier is never', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('  --a--b--c--|                              ');
            var subs = '         ^----------!                              ';
            var notifier = cold('           -                              ');
            var expected = '     --a--b--c---------------------------------';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should propagate error thrown from notifierSelector function', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('--a--b--c--|');
            var subs = '       ^----------!';
            var expected = '   --a--b--c--#';
            var result = source.pipe((0, operators_1.repeatWhen)((function () {
                throw 'bad!';
            })));
            expectObservable(result).toBe(expected, undefined, 'bad!');
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should complete if the notifier only completes', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('  --a--b--c--|');
            var subs = '         ^----------!';
            var notifier = cold('           |');
            var expected = '     --a--b--c--|';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should mirror a basic cold source with complete, given a never notifier', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('  --a--b--c--|');
            var subs = '         ^----------!';
            var notifier = cold('           |');
            var expected = '     --a--b--c--|';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should mirror a basic cold source with no termination, given a never notifier', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('  --a--b--c---');
            var subs = '         ^-----------';
            var notifier = cold('           |');
            var expected = '     --a--b--c---';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should mirror a basic hot source with complete, given a never notifier', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = hot('-a-^--b--c--|');
            var subs = '         ^--------!';
            var notifier = cold('         |');
            var expected = '     ---b--c--|';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it.skip('should handle a host source that completes via operator like take, and a hot notifier', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = hot('  -1--2--3----4--5---|');
            var ssubs = [
                '                   ^------!            ',
                '                   -------------^----! '
            ];
            var notifier = hot('--------------r--------r---r--r--r---|');
            var nsubs = '       -------^-----------!';
            var expected = '    -1--2----------5---|';
            var result = source.pipe((0, operators_1.takeWhile)(function (value) { return value !== '3'; }), (0, operators_1.repeatWhen)(function () { return notifier; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(ssubs);
            expectSubscriptions(notifier.subscriptions).toBe(nsubs);
        });
    });
    it('should tear down resources when result is unsubscribed early', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold(' -1--2--|');
            var unsub = '       --------------------!       ';
            var subs = [
                '                   ^------!                    ',
                '                   ---------^------!           ',
                '                   -----------------^--!       ',
            ];
            var notifier = hot('---------r-------r---------#');
            var nsubs = '       -------^------------!       ';
            var expected = '    -1--2-----1--2----1--       ';
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) { return notifier; }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
            expectSubscriptions(notifier.subscriptions).toBe(nsubs);
        });
    });
    it('should not break unsubscription chains when unsubscribed explicitly', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold(' -1--2--|');
            var subs = [
                '                   ^------!                    ',
                '                   ---------^------!           ',
                '                   -----------------^--!       ',
            ];
            var notifier = hot('---------r-------r-------r-#');
            var nsubs = '       -------^------------!       ';
            var expected = '    -1--2-----1--2----1--       ';
            var unsub = '       --------------------!       ';
            var result = source.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.repeatWhen)(function (notifications) { return notifier; }), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
            expectSubscriptions(notifier.subscriptions).toBe(nsubs);
        });
    });
    it('should handle a source with eventual error using a dynamic notifier selector which eventually throws', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('-1--2--|');
            var subs = [
                '                  ^------!              ',
                '                  -------^------!       ',
                '                  --------------^------!',
            ];
            var expected = '   -1--2---1--2---1--2--#';
            var invoked = 0;
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) {
                return notifications.pipe((0, operators_1.map)(function (err) {
                    if (++invoked === 3) {
                        throw 'error';
                    }
                    else {
                        return 'x';
                    }
                }));
            }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should handle a source with eventual error using a dynamic notifier selector which eventually completes', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('-1--2--|');
            var subs = [
                '                  ^------!              ',
                '                  -------^------!       ',
                '                  --------------^------!',
            ];
            var expected = '   -1--2---1--2---1--2--|';
            var invoked = 0;
            var result = source.pipe((0, operators_1.repeatWhen)(function (notifications) {
                return notifications.pipe((0, operators_1.map)(function () { return 'x'; }), (0, operators_1.takeUntil)(notifications.pipe((0, operators_1.mergeMap)(function () {
                    if (++invoked < 3) {
                        return rxjs_1.EMPTY;
                    }
                    else {
                        return (0, rxjs_1.of)('stop!');
                    }
                }))));
            }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should always finalize before starting the next cycle, even when synchronous', function () {
        var results = [];
        var source = new rxjs_1.Observable(function (subscriber) {
            subscriber.next(1);
            subscriber.next(2);
            subscriber.complete();
            return function () {
                results.push('finalizer');
            };
        });
        var subscription = source.pipe((0, operators_1.repeatWhen)(function (completions$) { return completions$.pipe((0, operators_1.takeWhile)(function (_, i) { return i < 3; })); })).subscribe({
            next: function (value) { return results.push(value); },
            complete: function () { return results.push('complete'); },
        });
        (0, chai_1.expect)(subscription.closed).to.be.true;
        (0, chai_1.expect)(results).to.deep.equal([1, 2, 'finalizer', 1, 2, 'finalizer', 1, 2, 'finalizer', 1, 2, 'complete', 'finalizer']);
    });
    it('should stop listening to a synchronous observable when unsubscribed', function () {
        var sideEffects = [];
        var synchronousObservable = new rxjs_1.Observable(function (subscriber) {
            for (var i = 0; !subscriber.closed && i < 10; i++) {
                sideEffects.push(i);
                subscriber.next(i);
            }
        });
        synchronousObservable
            .pipe((0, operators_1.repeatWhen)(function () { return (0, rxjs_1.of)(0); }), (0, operators_1.take)(3))
            .subscribe(function () {
        });
        (0, chai_1.expect)(sideEffects).to.deep.equal([0, 1, 2]);
    });
});
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