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Edit File: distinctUntilKeyChanged-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('distinctUntilKeyChanged', 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 values = { a: { k: 1 }, b: { k: 2 }, c: { k: 3 } };
            var e1 = hot('  -a--b-b----a-c-|', values);
            var e1Subs = '  ^--------------!';
            var expected = '-a--b------a-c-|';
            var result = e1.pipe((0, operators_1.distinctUntilKeyChanged)('k'));
            expectObservable(result).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1Subs);
        });
    });
    it('should distinguish between values', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var values = { a: { val: 1 }, b: { val: 2 } };
            var e1 = hot('  --a--a--a--b--b--a--|', values);
            var e1subs = '  ^-------------------!';
            var expected = '--a--------b-----a--|';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val'))).toBe(expected, values);
            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 values = { a: { val: 1 }, b: { val: 2 } };
            var e1 = hot('  --a--a--a--b--b--a-', values);
            var e1subs = '  ^                  ';
            var expected = '--a--------b-----a-';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val'))).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should distinguish between values with key', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var values = { a: { val: 1 }, b: { valOther: 1 }, c: { valOther: 3 }, d: { val: 1 }, e: { val: 5 } };
            var e1 = hot('--a--b--c--d--e--|', values);
            var e1subs = '     ^----------------!';
            var expected = '   --a--b-----d--e--|';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val'))).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should not compare if source does not have element with key', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var values = { a: { valOther: 1 }, b: { valOther: 1 }, c: { valOther: 3 }, d: { valOther: 1 }, e: { valOther: 5 } };
            var e1 = hot('--a--b--c--d--e--|', values);
            var e1subs = '     ^----------------!';
            var expected = '   --a--------------|';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val'))).toBe(expected, values);
            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.distinctUntilKeyChanged)('val'))).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.distinctUntilKeyChanged)('val'))).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.distinctUntilKeyChanged)('val'))).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.distinctUntilKeyChanged)('val'))).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 values = { a: { val: 1 } };
            var e1 = hot('  --a--|', values);
            var e1subs = '  ^----!';
            var expected = '--a--|';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val'))).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should emit if source is scalar', function () {
        testScheduler.run(function (_a) {
            var expectObservable = _a.expectObservable;
            var values = { a: { val: 1 } };
            var e1 = (0, rxjs_1.of)(values.a);
            var expected = '(a|)';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val'))).toBe(expected, values);
        });
    });
    it('should raise error if source raises error', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var values = { a: { val: 1 } };
            var e1 = hot('  --a--a--#', values);
            var e1subs = '  ^-------!';
            var expected = '--a-----#';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val'))).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should raise 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.distinctUntilKeyChanged)('val'))).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 values = { a: { val: 1 }, b: { val: 2 }, c: { val: 3 }, d: { val: 4 }, e: { val: 5 } };
            var e1 = hot('  --a--b--c--d--e--|', values);
            var e1subs = '  ^----------------!';
            var expected = '--a--b--c--d--e--|';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val'))).toBe(expected, values);
            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 values = { a: { val: 1 }, b: { val: 2 }, c: { val: 3 }, d: { val: 4 }, e: { val: 5 } };
            var e1 = hot('  --a--b--b--d--a--e--|', values);
            var e1subs = '  ^---------!          ';
            var expected = '--a--b-----          ';
            var unsub = '   ----------!          ';
            var result = e1.pipe((0, operators_1.distinctUntilKeyChanged)('val'));
            expectObservable(result, unsub).toBe(expected, values);
            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 values = { a: { val: 1 }, b: { val: 2 }, c: { val: 3 }, d: { val: 4 }, e: { val: 5 } };
            var e1 = hot('  --a--b--b--d--a--e--|', values);
            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.distinctUntilKeyChanged)('val'), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }));
            expectObservable(result, unsub).toBe(expected, values);
            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 values = { a: { val: 1 } };
            var e1 = hot('  --a--a--a--a--a--a--|', values);
            var e1subs = '  ^-------------------!';
            var expected = '--a-----------------|';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val'))).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should emit once if comparer returns true always regardless of source emits', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var values = { a: { val: 1 }, b: { val: 2 }, c: { val: 3 }, d: { val: 4 }, e: { val: 5 } };
            var e1 = hot('  --a--b--c--d--e--|', values);
            var e1subs = '  ^----------------!';
            var expected = '--a--------------|';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val', function () { return true; }))).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should emit all if comparer returns false always regardless of source emits', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var values = { a: { val: 1 } };
            var e1 = hot('  --a--a--a--a--a--a--|', values);
            var e1subs = '  ^-------------------!';
            var expected = '--a--a--a--a--a--a--|';
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val', function () { return false; }))).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should distinguish values by selector', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var values = { a: { val: 1 }, b: { val: 2 }, c: { val: 3 }, d: { val: 4 }, e: { val: 5 } };
            var e1 = hot('  --a--b--c--d--e--|', values);
            var e1subs = '  ^----------------!';
            var expected = '--a-----c-----e--|';
            var selector = function (x, y) { return y % 2 === 0; };
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val', selector))).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should raise error when comparer throws', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var values = { a: { val: 1 }, b: { val: 2 }, c: { val: 3 }, d: { val: 4 }, e: { val: 5 } };
            var e1 = hot('  --a--b--c--d--e--|', values);
            var e1subs = '  ^----------!      ';
            var expected = '--a--b--c--#      ';
            var selector = function (x, y) {
                if (y === 4) {
                    throw 'error';
                }
                return x === y;
            };
            expectObservable(e1.pipe((0, operators_1.distinctUntilKeyChanged)('val', selector))).toBe(expected, values);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    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.map)(function (value) { return ({ value: value }); }), (0, operators_1.distinctUntilKeyChanged)('value'), (0, operators_1.take)(3))
            .subscribe(function () {
        });
        (0, chai_1.expect)(sideEffects).to.deep.equal([0, 1, 2]);
    });
});
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