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Edit File: delayWhen-spec.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var rxjs_1 = require("rxjs");
var operators_1 = require("rxjs/operators");
var testing_1 = require("rxjs/testing");
var observableMatcher_1 = require("../helpers/observableMatcher");
var chai_1 = require("chai");
describe('delayWhen', function () {
    var testScheduler;
    beforeEach(function () {
        testScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should delay by duration selector', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ---a---b---c--|      ');
            var expected = '-----a------c----(b|)';
            var subs = '    ^-------------!      ';
            var selector = [
                cold('             --x--|            '),
                cold('                 ----------(x|)'),
                cold('                     -x--|     '),
            ];
            var selectorSubs = [
                '               ---^-!               ',
                '               -------^---------!   ',
                '               -----------^!        ',
            ];
            var idx = 0;
            function durationSelector(x) {
                return selector[idx++];
            }
            var result = e1.pipe((0, operators_1.delayWhen)(durationSelector));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector[0].subscriptions).toBe(selectorSubs[0]);
            expectSubscriptions(selector[1].subscriptions).toBe(selectorSubs[1]);
            expectSubscriptions(selector[2].subscriptions).toBe(selectorSubs[2]);
        });
    });
    it('should delay by selector', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('     --a--b--| ');
            var expected = '   ---a--b-| ';
            var subs = '       ^-------! ';
            var selector = cold('-x--|   ');
            var selectorSubs = [
                '                  --^!      ',
                '                  -----^!   ',
            ];
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
        });
    });
    it('should raise error if source raises error', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('      --a--# ');
            var expected = '    ---a-# ';
            var subs = '        ^----! ';
            var selector = cold(' -x--|');
            var selectorSubs = '--^!   ';
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
        });
    });
    it('should raise error if selector raises error', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('      --a--b--|');
            var expected = '    ---#     ';
            var subs = '        ^--!     ';
            var selector = cold(' -#     ');
            var selectorSubs = '--^!     ';
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
        });
    });
    it('should delay by selector and completes after value emits', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('     --a--b--|       ');
            var expected = '   ---------a--(b|)';
            var subs = '       ^-------!       ';
            var selector = cold('-------x--|   ');
            var selectorSubs = [
                '                  --^------!      ',
                '                  -----^------!   '
            ];
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
        });
    });
    it('should delay, but not emit if the selector never emits a notification', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('     --a--b--|   ');
            var expected = '   -----------|';
            var subs = '       ^-------!   ';
            var selector = cold('------|   ');
            var selectorSubs = [
                '                  --^-----!   ',
                '                  -----^-----!'
            ];
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
        });
    });
    it('should not emit for async source and sync empty selector', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  a--|');
            var expected = '---|';
            var subs = '    ^--!';
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return rxjs_1.EMPTY; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
        });
    });
    it('should not emit if selector never emits', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('     --a--b--|');
            var expected = '   -        ';
            var subs = '       ^-------!';
            var selector = cold('-      ');
            var selectorSubs = [
                '                  --^      ',
                '                  -----^   ',
            ];
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
        });
    });
    it('should delay by first value from selector', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('     --a--b--|       ');
            var expected = '   ------a--(b|)   ';
            var subs = '       ^-------!       ';
            var selector = cold('----x--y--|   ');
            var selectorSubs = [
                '                  --^---!         ',
                '                  -----^---!      ',
            ];
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
        });
    });
    it('should delay by selector that does not completes', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('     --a--b--|          ');
            var expected = '   ------a--(b|)      ';
            var subs = '       ^-------!          ';
            var selector = cold('----x-----y---   ');
            var selectorSubs = [
                '                  --^---!            ',
                '                  -----^---!         '
            ];
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
        });
    });
    it('should raise error if selector throws', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--b--|');
            var e1subs = '  ^-!      ';
            var expected = '--#      ';
            var err = new Error('error');
            var result = e1.pipe((0, operators_1.delayWhen)((function (x) {
                throw err;
            })));
            expectObservable(result).toBe(expected, null, err);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should start subscription when subscription delay emits', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('       -----a---b---| ');
            var expected = '     -------a---b-| ';
            var subs = '         ---^---------! ';
            var selector = cold('     --x--|    ');
            var selectorSubs = [
                '                      -----^-!     ',
                '                      ---------^-! '
            ];
            var subDelay = cold('---x--|        ');
            var subDelaySub = '  ^--!           ';
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }, subDelay));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
            expectSubscriptions(subDelay.subscriptions).toBe(subDelaySub);
        });
    });
    it('should start subscription when subscription delay completes without emit value', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('       -----a---b---| ');
            var expected = '     -------a---b-| ';
            var subs = '         ---^---------! ';
            var selector = cold('     --x--|    ');
            var selectorSubs = [
                '                    -----^-!       ',
                '                    ---------^-!   '
            ];
            var subDelay = cold('---|           ');
            var subDelaySub = '  ^--!           ';
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }, subDelay));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(subs);
            expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
            expectSubscriptions(subDelay.subscriptions).toBe(subDelaySub);
        });
    });
    it('should raise error when subscription delay raises error', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('       -----a---b---|');
            var expected = '     ---#          ';
            var selector = cold('     --x--|   ');
            var subDelay = cold('---#          ');
            var subDelaySub = '  ^--!          ';
            var result = e1.pipe((0, operators_1.delayWhen)(function (x) { return selector; }, subDelay));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe([]);
            expectSubscriptions(selector.subscriptions).toBe([]);
            expectSubscriptions(subDelay.subscriptions).toBe(subDelaySub);
        });
    });
    it('should complete when duration selector returns synchronous observable', function () {
        var next = false;
        var complete = false;
        (0, rxjs_1.of)(1)
            .pipe((0, operators_1.delayWhen)(function () { return (0, rxjs_1.of)(2); }))
            .subscribe({ next: function () { return (next = true); }, complete: function () { return (complete = true); } });
        (0, chai_1.expect)(next).to.be.true;
        (0, chai_1.expect)(complete).to.be.true;
    });
    it('should call predicate with indices starting at 0', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('       --a--b--c--|');
            var e1subs = '       ^----------!';
            var expected = '     --a--b--c--|';
            var selector = cold('  (x|)');
            var indices = [];
            var predicate = function (value, index) {
                indices.push(index);
                return selector;
            };
            var result = e1.pipe((0, operators_1.delayWhen)(predicate));
            expectObservable(result.pipe((0, operators_1.tap)({
                complete: function () {
                    (0, chai_1.expect)(indices).to.deep.equal([0, 1, 2]);
                },
            }))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
});
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