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Edit File: sampleTime-spec.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var operators_1 = require("rxjs/operators");
var testing_1 = require("rxjs/testing");
var rxjs_1 = require("rxjs");
var observableMatcher_1 = require("../helpers/observableMatcher");
describe('sampleTime', function () {
    var rxTest;
    beforeEach(function () {
        rxTest = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should get samples on a delay', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions, time = _a.time;
            var e1 = hot('     a---b-c---------d--e---f-g-h--|');
            var e1subs = '     ^-----------------------------!';
            var expected = '   -------c-------------e------h-|';
            var period = time('-------|                       ');
            expectObservable(e1.pipe((0, operators_1.sampleTime)(period, rxTest))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should sample nothing if new value has not arrived', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions, time = _a.time;
            var e1 = hot('  ----a-^--b----c--------------f----|');
            var e1subs = '        ^---------------------------!';
            var expected = '      -----------c----------------|';
            var period = time('   -----------|                 ');
            expectObservable(e1.pipe((0, operators_1.sampleTime)(period, rxTest))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should sample if new value has arrived, even if it is the same value', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions, time = _a.time;
            var e1 = hot('----a-^--b----c----------c---f----|');
            var e1subs = '      ^---------------------------!';
            var expected = '    -----------c----------c-----|';
            var period = time(' -----------|                 ');
            expectObservable(e1.pipe((0, operators_1.sampleTime)(period, rxTest))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should sample nothing if source has not nexted by time of sample', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions, time = _a.time;
            var e1 = hot('----a-^-------------b-------------|');
            var e1subs = '      ^---------------------------!';
            var expected = '    ----------------------b-----|';
            var period = time(' -----------|                 ');
            expectObservable(e1.pipe((0, operators_1.sampleTime)(period, rxTest))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should raise error if source raises error', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions, time = _a.time;
            var e1 = hot('----a-^--b----c----d----#');
            var e1subs = '      ^-----------------!';
            var expected = '    -----------c------#';
            var period = time(' -----------|       ');
            expectObservable(e1.pipe((0, operators_1.sampleTime)(period, rxTest))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should allow unsubscribing explicitly and early', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions, time = _a.time;
            var e1 = hot('----a-^--b----c----d----e----f----|');
            var unsub = '       ----------------!            ';
            var e1subs = '      ^---------------!            ';
            var expected = '    -----------c-----            ';
            var period = time(' -----------|                 ');
            expectObservable(e1.pipe((0, operators_1.sampleTime)(period, rxTest)), unsub).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    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, time = _a.time;
            var e1 = hot('----a-^--b----c----d----e----f----|');
            var e1subs = '      ^---------------!            ';
            var period = time(' -----------|                 ');
            var expected = '    -----------c-----            ';
            var unsub = '       ----------------!            ';
            var result = e1.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.sampleTime)(period, rxTest), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should completes if source does not emits', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions, time = _a.time;
            var e1 = cold('    |     ');
            var e1subs = '     (^!)  ';
            var expected = '   |     ';
            var period = time('-----|');
            expectObservable(e1.pipe((0, operators_1.sampleTime)(period, rxTest))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should raise error if source throws immediately', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions, time = _a.time;
            var e1 = cold('    #     ');
            var e1subs = '     (^!)  ';
            var expected = '   #     ';
            var period = time('-----|');
            expectObservable(e1.pipe((0, operators_1.sampleTime)(period, rxTest))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should not complete if source does not complete', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions, time = _a.time;
            var e1 = cold('    --------');
            var e1subs = '     ^------!';
            var expected = '   --------';
            var period = time('-----|  ');
            var e1unsbs = '    -------!';
            expectObservable(e1.pipe((0, operators_1.sampleTime)(period, rxTest)), e1unsbs).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
});
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