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Edit File: distinct-spec.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var chai_1 = require("chai");
var operators_1 = require("rxjs/operators");
var testing_1 = require("rxjs/testing");
var rxjs_1 = require("rxjs");
var observableMatcher_1 = require("../helpers/observableMatcher");
describe('distinct', function () {
    var testScheduler;
    beforeEach(function () {
        testScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should distinguish between values', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--a--a--b--b--a--|');
            var e1subs = '  ^-------------------!';
            var expected = '--a--------b--------|';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should distinguish between values and does not complete', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--a--a--b--b--a-');
            var e1subs = '  ^------------------';
            var expected = '--a--------b-------';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should not complete if source never completes', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' -');
            var e1subs = '  ^';
            var expected = '-';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should not complete if source does not complete', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  -');
            var e1subs = '  ^';
            var expected = '-';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should complete if source is empty', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' |');
            var e1subs = '  (^!)';
            var expected = '|';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should complete if source does not emit', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ------|');
            var e1subs = '  ^-----!';
            var expected = '------|';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should emit if source emits single element only', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--|');
            var e1subs = '  ^----!';
            var expected = '--a--|';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should emit if source is scalar', function () {
        testScheduler.run(function (_a) {
            var expectObservable = _a.expectObservable;
            var e1 = (0, rxjs_1.of)('a');
            var expected = '(a|)';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
        });
    });
    it('should raises error if source raises error', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--a--#');
            var e1subs = '  ^-------!';
            var expected = '--a-----#';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should raises error if source throws', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' #   ');
            var e1subs = '  (^!)';
            var expected = '#   ';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should not omit if source elements are all different', function () {
        testScheduler.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 expected = '--a--b--c--d--e--f--|';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should allow unsubscribing early and explicitly', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--b--b--d--a--f--|');
            var e1subs = '  ^---------!          ';
            var expected = '--a--b-----          ';
            var unsub = '   ----------!          ';
            var result = e1.pipe((0, operators_1.distinct)());
            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, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--b--b--d--a--f--|');
            var e1subs = '  ^---------!          ';
            var expected = '--a--b-----          ';
            var unsub = '   ----------!          ';
            var result = e1.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.distinct)(), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should emit once if source elements are all same', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--a--a--a--a--a--|');
            var e1subs = '  ^-------------------!';
            var expected = '--a-----------------|';
            expectObservable(e1.pipe((0, operators_1.distinct)())).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should distinguish values by key', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var values = { a: 1, b: 2, c: 3, d: 4, e: 5, f: 6 };
            var e1 = hot('  --a--b--c--d--e--f--|', values);
            var e1subs = '  ^-------------------!';
            var expected = '--a--b--c-----------|';
            var selector = function (value) { return value % 3; };
            expectObservable(e1.pipe((0, operators_1.distinct)(selector))).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should raises error when selector throws', function () {
        testScheduler.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 expected = '--a--b--c--#         ';
            var selector = function (value) {
                if (value === 'd') {
                    throw new Error('d is for dumb');
                }
                return value;
            };
            expectObservable(e1.pipe((0, operators_1.distinct)(selector))).toBe(expected, undefined, new Error('d is for dumb'));
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should support a flushing stream', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--b--a--b--a--b--|');
            var e1subs = '  ^-------------------!';
            var e2 = hot('  -----------x--------|');
            var e2subs = '  ^-------------------!';
            var expected = '--a--b--------a--b--|';
            expectObservable(e1.pipe((0, operators_1.distinct)(undefined, e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should raise error if flush raises error', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--b--a--b--a--b--|');
            var e1subs = '  ^------------!       ';
            var e2 = hot('  -----------x-#       ');
            var e2subs = '  ^------------!       ';
            var expected = '--a--b-------#       ';
            expectObservable(e1.pipe((0, operators_1.distinct)(undefined, e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should unsubscribe from the flushing stream when the main stream is unsubbed', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--b--a--b--a--b--|');
            var e1subs = '  ^----------!         ';
            var e2 = hot('  -----------x--------|');
            var e2subs = '  ^----------!         ';
            var unsub = '   -----------!         ';
            var expected = '--a--b------         ';
            expectObservable(e1.pipe((0, operators_1.distinct)(undefined, e2)), unsub).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should allow opting in to default comparator with flush', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --a--b--a--b--a--b--|');
            var e1subs = '  ^-------------------!';
            var e2 = hot('  -----------x--------|');
            var e2subs = '  ^-------------------!';
            var expected = '--a--b--------a--b--|';
            expectObservable(e1.pipe((0, operators_1.distinct)(undefined, e2))).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should stop listening to a synchronous observable when unsubscribed', function () {
        var sideEffects = [];
        var synchronousObservable = new rxjs_1.Observable(function (subscriber) {
            for (var i = 0; !subscriber.closed && i < 10; i++) {
                sideEffects.push(i);
                subscriber.next(i);
            }
        });
        synchronousObservable.pipe((0, operators_1.distinct)(), (0, operators_1.take)(3)).subscribe(function () {
        });
        (0, chai_1.expect)(sideEffects).to.deep.equal([0, 1, 2]);
    });
});
//# sourceMappingURL=distinct-spec.js.map

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