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Edit File: debounceTime-spec.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var chai_1 = require("chai");
var rxjs_1 = require("rxjs");
var AnimationFrameAction_1 = require("rxjs/internal/scheduler/AnimationFrameAction");
var AnimationFrameScheduler_1 = require("rxjs/internal/scheduler/AnimationFrameScheduler");
var operators_1 = require("rxjs/operators");
var testing_1 = require("rxjs/testing");
var VirtualTimeScheduler_1 = require("../../src/internal/scheduler/VirtualTimeScheduler");
var observableMatcher_1 = require("../helpers/observableMatcher");
describe('debounceTime', function () {
    var testScheduler;
    beforeEach(function () {
        testScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should debounce values by 2 time units', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  -a--bc--d---|');
            var e1subs = '  ^-----------!';
            var expected = '---a---c--d-|';
            var t = time('  --|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should delay all elements by the specified time', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  -a--------b------c----|');
            var e1subs = '  ^---------------------!';
            var expected = '------a--------b------(c|)';
            var t = time('  -----|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should debounce and delay element by the specified time', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  -a--(bc)-----------d-------|');
            var e1subs = '  ^--------------------------!';
            var expected = '---------c--------------d--|';
            var t = time('  -----|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should complete when source does not emit', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  -----|');
            var e1subs = '  ^----!';
            var expected = '-----|';
            var t = time('  -|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should complete when source is empty', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' |');
            var e1subs = '  (^!)';
            var expected = '|';
            var t = time('  -|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should raise error when source does not emit and raises error', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  -----#');
            var e1subs = '  ^----!';
            var expected = '-----#';
            var t = time('  -|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should raise error when source throws', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' #');
            var e1subs = '  (^!)';
            var expected = '#';
            var t = time('  -|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should allow unsubscribing early and explicitly', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--bc--d----|');
            var e1subs = '  ^------!       ';
            var expected = '----a---       ';
            var unsub = '   -------!       ';
            var t = time('  --|');
            var result = e1.pipe((0, operators_1.debounceTime)(t));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should not break unsubscription chains when unsubscribed explicitly', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--bc--d----|');
            var e1subs = '  ^------!       ';
            var expected = '----a---       ';
            var unsub = '   -------!       ';
            var t = time('  --|');
            var result = e1.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.debounceTime)(t), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should debounce and does not complete when source does not completes', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  -a--(bc)-----------d-------');
            var e1subs = '  ^--------------------------';
            var expected = '---------c--------------d--';
            var t = time('  -----|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should not completes when source does not completes', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  -');
            var e1subs = '  ^';
            var expected = '-';
            var t = time('  -|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should not completes when source never completes', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' -');
            var e1subs = '  ^';
            var expected = '-';
            var t = time('  -|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should delay all elements until source raises error', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  -a--------b------c----#');
            var e1subs = '  ^---------------------!';
            var expected = '------a--------b------#';
            var t = time('  -----|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should debounce all elements while source emits within given time', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--b--c--d--e--f--g--h-|');
            var e1subs = '  ^------------------------!';
            var expected = '-------------------------(h|)';
            var t = time('  ----|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should debounce all element while source emits within given time until raises error', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, time = _a.time, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--b--c--d--e--f--g--h-#');
            var e1subs = '  ^------------------------!';
            var expected = '-------------------------#';
            var t = time('  ----|');
            expectObservable(e1.pipe((0, operators_1.debounceTime)(t))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should debounce correctly when synchronously reentered', function () {
        var results = [];
        var source = new rxjs_1.Subject();
        var scheduler = new VirtualTimeScheduler_1.VirtualTimeScheduler();
        source.pipe((0, operators_1.debounceTime)(0, scheduler)).subscribe(function (value) {
            results.push(value);
            if (value === 1) {
                source.next(2);
            }
        });
        source.next(1);
        scheduler.flush();
        (0, chai_1.expect)(results).to.deep.equal([1, 2]);
    });
    it('should unsubscribe from the scheduled debounce action when downstream unsubscribes', function () {
        var scheduler = new AnimationFrameScheduler_1.AnimationFrameScheduler(AnimationFrameAction_1.AnimationFrameAction);
        (0, chai_1.expect)(scheduler._scheduled).to.not.exist;
        (0, chai_1.expect)(scheduler.actions).to.be.empty;
        var subscription = rxjs_1.NEVER.pipe((0, operators_1.startWith)(1), (0, operators_1.debounceTime)(0, scheduler)).subscribe();
        (0, chai_1.expect)(scheduler._scheduled).to.exist;
        (0, chai_1.expect)(scheduler.actions.length).to.equal(1);
        subscription.unsubscribe();
        (0, chai_1.expect)(scheduler._scheduled).to.not.exist;
        (0, chai_1.expect)(scheduler.actions).to.be.empty;
    });
});
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