JezK

Edit File: sample-spec.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var chai_1 = require("chai");
var operators_1 = require("rxjs/operators");
var rxjs_1 = require("rxjs");
var testing_1 = require("rxjs/testing");
var observableMatcher_1 = require("../helpers/observableMatcher");
describe('sample', function () {
    var rxTest;
    beforeEach(function () {
        rxTest = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should get samples when the notifier emits', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ---a----b---c----------d-----|   ');
            var e1subs = '  ^----------------------------!   ';
            var e2 = hot('  -----x----------x---x------x---| ');
            var e2subs = '  ^----------------------------!   ';
            var expected = '-----a----------c----------d-|   ';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should sample nothing if source has not nexted at all', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('----a-^------------|');
            var e1subs = '      ^------------!';
            var e2 = hot('      -----x-------|');
            var e2subs = '      ^------------!';
            var expected = '    -------------|';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should behave properly when notified by the same observable as the source (issue #2075)', function () {
        var item$ = new rxjs_1.Subject();
        var results = [];
        item$.pipe((0, operators_1.sample)(item$)).subscribe(function (value) { return results.push(value); });
        item$.next(1);
        item$.next(2);
        item$.next(3);
        (0, chai_1.expect)(results).to.deep.equal([1, 2, 3]);
    });
    it('should sample nothing if source has nexted after all notifications, but notifier does not complete', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ----a-^------b-----|');
            var e1subs = '        ^------------!';
            var e2 = hot('        -----x--------');
            var e2subs = '        ^------------!';
            var expected = '      -------------|';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should not sample when the notifier completes', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ----a-^------b----------|');
            var e1subs = '        ^-----------------!';
            var e2 = hot('        -----x-----|       ');
            var e2subs = '        ^----------!       ';
            var expected = '      ------------------|';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should not complete when the notifier completes, nor should it emit', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ----a----b----c----d----e----f----');
            var e1subs = '  ^---------------------------------';
            var e2 = hot('  ------x-|                         ');
            var e2subs = '  ^-------!                         ';
            var expected = '------a---------------------------';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should complete only when the source completes, if notifier completes early', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ----a----b----c----d----e----f---|');
            var e1subs = '  ^--------------------------------!';
            var e2 = hot('  ------x-|                         ');
            var e2subs = '  ^-------!                         ';
            var expected = '------a--------------------------|';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should allow unsubscribing explicitly and early', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ----a-^--b----c----d----e----f----|          ');
            var unsub = '         --------------!                        ';
            var e1subs = '        ^-------------!                        ';
            var e2 = hot('        -----x----------x----------x----------|');
            var e2subs = '        ^-------------!                        ';
            var expected = '      -----b---------                        ';
            expectObservable(e1.pipe((0, operators_1.sample)(e2)), unsub).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ----a-^--b----c----d----e----f----|          ');
            var e1subs = '        ^-------------!                        ';
            var e2 = hot('        -----x----------x----------x----------|');
            var e2subs = '        ^-------------!                        ';
            var expected = '      -----b---------                        ';
            var unsub = '         --------------!                        ';
            var result = e1.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.sample)(e2), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should only sample when a new value arrives, even if it is the same value', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ----a----b----c----c----e----f----|  ');
            var e1subs = '  ^---------------------------------!  ';
            var e2 = hot('  ------x-x------xx-x---x----x--------|');
            var e2subs = '  ^---------------------------------!  ';
            var expected = '------a--------c------c----e------|  ';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should raise error if source raises error', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ----a-^--b----c----d----#                    ');
            var e1subs = '        ^-----------------!                    ';
            var e2 = hot('        -----x----------x----------x----------|');
            var e2subs = '        ^-----------------!                    ';
            var expected = '      -----b----------d-#                    ';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should completes if source does not emits', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  |              ');
            var e2 = hot('  ------x-------|');
            var expected = '|              ';
            var e1subs = '  (^!)           ';
            var e2subs = '  (^!)           ';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should raise error if source throws immediately', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  #              ');
            var e2 = hot('  ------x-------|');
            var expected = '#              ';
            var e1subs = '  (^!)           ';
            var e2subs = '  (^!)           ';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should raise error if notification raises error', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a-----|');
            var e2 = hot('  ----#    ');
            var expected = '----#    ';
            var e1subs = '  ^---!    ';
            var e2subs = '  ^---!    ';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should not completes if source does not complete', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ---------------');
            var e1subs = '  ^--------------';
            var e2 = hot('  ------x-------|');
            var e2subs = '  ^-------------!';
            var expected = '---------------';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should sample only until source completes', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ----a----b----c----d-|              ');
            var e1subs = '  ^--------------------!              ';
            var e2 = hot('  -----------x----------x------------|');
            var e2subs = '  ^--------------------!              ';
            var expected = '-----------b---------|              ';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should complete sampling if sample observable completes', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ----a----b----c----d-|');
            var e1subs = '  ^--------------------!';
            var e2 = hot('  |                     ');
            var e2subs = '  (^!)                  ';
            var expected = '---------------------|';
            expectObservable(e1.pipe((0, operators_1.sample)(e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
});
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