@reactivex/rxjs/spec-js/operators/bufferToggle-spec.js

Reactive Extensions for modern JavaScript

"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {bufferToggle} */
describe('Observable.prototype.bufferToggle', function () {
    asDiagram('bufferToggle')('should emit buffers using hot openings and hot closings', function () {
        var e1 = hot('---a---b---c---d---e---f---g---|');
        var e2 = hot('--o------------------o---------|');
        var e3 = hot('---------c---------------c-----|');
        var expected = '---------x---------------y-----|';
        var values = {
            x: ['a', 'b'],
            y: ['f'],
        };
        var result = e1.bufferToggle(e2, function (x) { return e3; });
        expectObservable(result).toBe(expected, values);
    });
    it('should emit buffers that are opened by an observable from the first argument ' +
        'and closed by an observable returned by the function in the second argument', function () {
        var e1 = hot('-----a----b----c----d----e----f----g----h----i----|');
        var e2 = cold('-------------x-------------y--------------z-------|');
        var e3 = cold('---------------(j|)');
        //                                         ---------------(j|)
        //                                                        ---------------(j|)
        var expected = '----------------------------q-------------r-------(s|)';
        var values = {
            q: ['c', 'd', 'e'],
            r: ['f', 'g', 'h'],
            s: ['i']
        };
        var innerVals = ['x', 'y', 'z'];
        expectObservable(e1.bufferToggle(e2, function (x) {
            chai_1.expect(x).to.equal(innerVals.shift());
            return e3;
        })).toBe(expected, values);
    });
    it('should emit buffers using constying cold closings', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|      ');
        var e2 = cold('--x-----------y--------z---|              ');
        var subs = '^                                  !      ';
        var closings = [
            cold('---------------s--|                     '),
            cold('----(s|)                    '),
            cold('---------------(s|)')];
        var closeSubs = ['  ^              !                        ',
            '              ^   !                       ',
            '                       ^           !      '];
        var expected = '-----------------ij----------------(k|)   ';
        var values = {
            i: ['b', 'c', 'd', 'e'],
            j: ['e'],
            k: ['g', 'h']
        };
        var i = 0;
        var result = e1.bufferToggle(e2, function () { return closings[i++]; });
        expectObservable(result).toBe(expected, values);
        expectSubscriptions(e1.subscriptions).toBe(subs);
        expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
        expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
        expectSubscriptions(closings[2].subscriptions).toBe(closeSubs[2]);
    });
    it('should emit buffers using constying hot closings', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|   ');
        var e2 = cold('--x-----------y--------z---|           ');
        var subs = '^                                  !   ';
        var closings = [
            { obs: hot('-1--^----------------s-|                   '),
                sub: '  ^              !                     ' },
            { obs: hot('-----3----4-------(s|)                 '),
                sub: '              ^   !                    ' },
            { obs: hot('-------3----4-------5----------------s|'),
                sub: '                       ^           !   ' }]; // eslint-disable-line key-spacing
        var expected = '-----------------ij----------------(k|)';
        var values = {
            i: ['b', 'c', 'd', 'e'],
            j: ['e'],
            k: ['g', 'h']
        };
        var i = 0;
        var result = e1.bufferToggle(e2, function () { return closings[i++].obs; });
        expectObservable(result).toBe(expected, values);
        expectSubscriptions(e1.subscriptions).toBe(subs);
        for (var j = 0; j < closings.length; j++) {
            expectSubscriptions(closings[j].obs.subscriptions).toBe(closings[j].sub);
        }
    });
    it('should emit buffers using constying empty delayed closings', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|   ');
        var e2 = cold('--x-----------y--------z---|           ');
        var subs = '^                                  !   ';
        var closings = [
            cold('---------------|                     '),
            cold('----|                    '),
            cold('---------------|')];
        var expected = '-----------------ij----------------(k|)';
        var values = {
            i: ['b', 'c', 'd', 'e'],
            j: ['e'],
            k: ['g', 'h']
        };
        var i = 0;
        var result = e1.bufferToggle(e2, function () { return closings[i++]; });
        expectObservable(result).toBe(expected, values);
        expectSubscriptions(e1.subscriptions).toBe(subs);
    });
    it('should emit buffers using constying cold closings, outer unsubscribed early', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|      ');
        var subs = '^         !                               ';
        var e2 = cold('--x-----------y--------z---|              ');
        var closings = [
            cold('---------------s--|                     '),
            cold('----(s|)                    '),
            cold('---------------(s|)')];
        var csub0 = '  ^       !                               ';
        var expected = '-----------                               ';
        var unsub = '          !                               ';
        var values = {
            i: ['b', 'c', 'd', 'e']
        };
        var i = 0;
        var result = e1.bufferToggle(e2, function () { return closings[i++]; });
        expectObservable(result, unsub).toBe(expected, values);
        expectSubscriptions(e1.subscriptions).toBe(subs);
        expectSubscriptions(closings[0].subscriptions).toBe(csub0);
        expectSubscriptions(closings[1].subscriptions).toBe([]);
        expectSubscriptions(closings[2].subscriptions).toBe([]);
    });
    it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|      ');
        var subs = '^                 !                       ';
        var e2 = cold('--x-----------y--------z---|              ');
        var closings = [
            cold('---------------s--|                     '),
            cold('----(s|)                    '),
            cold('---------------(s|)')];
        var expected = '-----------------i-                       ';
        var unsub = '                  !                       ';
        var values = {
            i: ['b', 'c', 'd', 'e']
        };
        var i = 0;
        var result = e1
            .mergeMap(function (x) { return Observable.of(x); })
            .bufferToggle(e2, function () { return closings[i++]; })
            .mergeMap(function (x) { return Observable.of(x); });
        expectObservable(result, unsub).toBe(expected, values);
        expectSubscriptions(e1.subscriptions).toBe(subs);
    });
    it('should propagate error thrown from closingSelector', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|      ');
        var e2 = cold('--x-----------y--------z---|              ');
        var subs = '^             !                           ';
        var closings = [
            cold('---------------s--|                     '),
            cold('----(s|)                    '),
            cold('---------------(s|)')];
        var closeSubs0 = '  ^           !                           ';
        var expected = '--------------#                           ';
        var i = 0;
        var result = e1.bufferToggle(e2, function () {
            if (i === 1) {
                throw 'error';
            }
            return closings[i++];
        });
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(subs);
        expectSubscriptions(closings[0].subscriptions).toBe(closeSubs0);
        expectSubscriptions(closings[1].subscriptions).toBe([]);
        expectSubscriptions(closings[2].subscriptions).toBe([]);
    });
    it('should propagate error emitted from a closing', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|');
        var e2 = cold('--x-----------y--------z---|        ');
        var subs = '^             !                     ';
        var closings = [
            cold('---------------s--|               '),
            cold('#                     ')];
        var closeSubs = ['  ^           !                     ',
            '              (^!)                  '];
        var expected = '--------------#                     ';
        var i = 0;
        var result = e1.bufferToggle(e2, function () { return closings[i++]; });
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(subs);
        expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
        expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
    });
    it('should propagate error emitted late from a closing', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|');
        var e2 = cold('--x-----------y--------z---|        ');
        var subs = '^                  !                ';
        var closings = [
            cold('---------------s--|               '),
            cold('-----#                ')];
        var closeSubs = ['  ^              !                  ',
            '              ^    !                '];
        var expected = '-----------------i-#                ';
        var values = {
            i: ['b', 'c', 'd', 'e']
        };
        var i = 0;
        var result = e1.bufferToggle(e2, function () { return closings[i++]; });
        expectObservable(result).toBe(expected, values);
        expectSubscriptions(e1.subscriptions).toBe(subs);
        expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
        expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
    });
    it('should handle errors', function () {
        var e1 = hot('--a--^---b---c---d---e--#        ');
        var e2 = cold('--x-----------y--------z---|');
        var subs = '^                  !        ';
        var closings = [
            cold('---------------s--|       '),
            cold('-------s|     ')];
        var closeSubs = ['  ^              !                  ',
            '              ^    !                '];
        var expected = '-----------------i-#        ';
        var values = {
            i: ['b', 'c', 'd', 'e']
        };
        var i = 0;
        var result = e1.bufferToggle(e2, function () { return closings[i++]; });
        expectObservable(result).toBe(expected, values);
        expectSubscriptions(e1.subscriptions).toBe(subs);
        expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
        expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
    });
    it('should handle empty source', function () {
        var e1 = cold('|');
        var e2 = cold('--o-----|');
        var e3 = cold('-----c--|');
        var expected = '|';
        var values = { x: [] };
        var result = e1.bufferToggle(e2, function () { return e3; });
        expectObservable(result).toBe(expected, values);
    });
    it('should handle throw', function () {
        var e1 = cold('#');
        var e2 = cold('--o-----|');
        var e3 = cold('-----c--|');
        var expected = '#';
        var values = { x: [] };
        var result = e1.bufferToggle(e2, function () { return e3; });
        expectObservable(result).toBe(expected, values);
    });
    it('should handle never', function () {
        var e1 = hot('-');
        var e2 = cold('--o-----o------o-----o---o-----|');
        var e3 = cold('--c-|');
        var unsub = '                                            !';
        var subs = '^                                           !';
        var expected = '----x-----x------x-----x---x-----------------';
        var values = { x: [] };
        var result = e1.bufferToggle(e2, function () { return e3; });
        expectObservable(result, unsub).toBe(expected, values);
        expectSubscriptions(e1.subscriptions).toBe(subs);
    });
    it('should handle a never opening Observable', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|');
        var e2 = cold('-');
        var e3 = cold('--c-|');
        var expected = '-----------------------------------|';
        var result = e1.bufferToggle(e2, function () { return e3; });
        expectObservable(result).toBe(expected);
    });
    it('should handle a never closing Observable', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|');
        var e2 = cold('---o---------------o-----------|');
        var e3 = cold('-');
        var expected = '-----------------------------------(xy|)';
        var values = {
            x: ['b', 'c', 'd', 'e', 'f', 'g', 'h'],
            y: ['f', 'g', 'h']
        };
        var result = e1.bufferToggle(e2, function () { return e3; });
        expectObservable(result).toBe(expected, values);
    });
    it('should handle opening Observable that just throws', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|');
        var e1subs = '(^!)';
        var e2 = cold('#');
        var e2subs = '(^!)';
        var e3 = cold('--c-|');
        var expected = '#';
        var result = e1.bufferToggle(e2, function () { return e3; });
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should accept openings resolved promise', function (done) {
        var e1 = Observable.concat(Observable.timer(10).mapTo(1), Observable.timer(100).mapTo(2), Observable.timer(150).mapTo(3), Observable.timer(200).mapTo(4));
        var expected = [[1]];
        e1.bufferToggle(new Promise(function (resolve) { resolve(42); }), function () {
            return Observable.timer(50);
        }).subscribe(function (x) {
            chai_1.expect(x).to.deep.equal(expected.shift());
        }, function (x) {
            done(new Error('should not be called'));
        }, function () {
            chai_1.expect(expected.length).to.be.equal(0);
            done();
        });
    });
    it('should accept openings rejected promise', function (done) {
        var e1 = Observable.concat(Observable.of(1), Observable.timer(10).mapTo(2), Observable.timer(10).mapTo(3), Observable.timer(100).mapTo(4));
        var expected = 42;
        e1.bufferToggle(new Promise(function (resolve, reject) { reject(expected); }), function () {
            return Observable.timer(50);
        }).subscribe(function (x) {
            done(new Error('should not be called'));
        }, function (x) {
            chai_1.expect(x).to.equal(expected);
            done();
        }, function () {
            done(new Error('should not be called'));
        });
    });
    it('should accept closing selector that returns a resolved promise', function (done) {
        var e1 = Observable.concat(Observable.of(1), Observable.timer(10).mapTo(2), Observable.timer(10).mapTo(3), Observable.timer(100).mapTo(4));
        var expected = [[1]];
        e1.bufferToggle(Observable.of(10), function () { return new Promise(function (resolve) { resolve(42); }); })
            .subscribe(function (x) {
            chai_1.expect(x).to.deep.equal(expected.shift());
        }, function () {
            done(new Error('should not be called'));
        }, function () {
            chai_1.expect(expected.length).to.be.equal(0);
            done();
        });
    });
    it('should accept closing selector that returns a rejected promise', function (done) {
        var e1 = Observable.concat(Observable.of(1), Observable.timer(10).mapTo(2), Observable.timer(10).mapTo(3), Observable.timer(100).mapTo(4));
        var expected = 42;
        e1.bufferToggle(Observable.of(10), function () { return new Promise(function (resolve, reject) { reject(expected); }); })
            .subscribe(function (x) {
            done(new Error('should not be called'));
        }, function (x) {
            chai_1.expect(x).to.equal(expected);
            done();
        }, function () {
            done(new Error('should not be called'));
        });
    });
    it('should handle empty closing observable', function () {
        var e1 = hot('--a--^---b---c---d---e---f---g---h------|');
        var subs = '^                                  !';
        var e2 = cold('--x-----------y--------z---|        ');
        var expected = '--l-----------m--------n-----------|';
        var result = e1.bufferToggle(e2, function () { return Observable.empty(); });
        expectObservable(result).toBe(expected, { l: [], m: [], n: [] });
        expectSubscriptions(e1.subscriptions).toBe(subs);
    });
});
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