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Edit File: tap-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('tap', function () {
    var testScheduler;
    beforeEach(function () {
        testScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should mirror multiple values and complete', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' --1--2--3--|');
            var e1subs = '  ^----------!';
            var expected = '--1--2--3--|';
            var result = e1.pipe((0, operators_1.tap)(function () {
            }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should next with a callback', function () {
        var value = null;
        (0, rxjs_1.of)(42)
            .pipe((0, operators_1.tap)(function (x) {
            value = x;
        }))
            .subscribe();
        (0, chai_1.expect)(value).to.equal(42);
    });
    it('should error with a callback', function () {
        var err = null;
        (0, rxjs_1.throwError)(function () { return 'bad'; })
            .pipe((0, operators_1.tap)({
            error: function (x) {
                err = x;
            },
        }))
            .subscribe({
            error: function (ex) {
                (0, chai_1.expect)(ex).to.equal('bad');
            },
        });
        (0, chai_1.expect)(err).to.equal('bad');
    });
    it('should handle everything with an observer', function (done) {
        var expected = [1, 2, 3];
        var results = [];
        (0, rxjs_1.of)(1, 2, 3)
            .pipe((0, operators_1.tap)({
            next: function (x) {
                results.push(x);
            },
            error: function () {
                done(new Error('should not be called'));
            },
            complete: function () {
                (0, chai_1.expect)(results).to.deep.equal(expected);
                done();
            },
        }))
            .subscribe();
    });
    it('should handle everything with a Subject', function (done) {
        var expected = [1, 2, 3];
        var results = [];
        var subject = new rxjs_1.Subject();
        subject.subscribe({
            next: function (x) {
                results.push(x);
            },
            error: function () {
                done(new Error('should not be called'));
            },
            complete: function () {
                (0, chai_1.expect)(results).to.deep.equal(expected);
                done();
            },
        });
        (0, rxjs_1.of)(1, 2, 3).pipe((0, operators_1.tap)(subject)).subscribe();
    });
    it('should handle an error with a callback', function () {
        var errored = false;
        (0, rxjs_1.throwError)(function () { return 'bad'; })
            .pipe((0, operators_1.tap)({
            error: function (err) {
                (0, chai_1.expect)(err).to.equal('bad');
            },
        }))
            .subscribe({
            error: function (err) {
                errored = true;
                (0, chai_1.expect)(err).to.equal('bad');
            },
        });
        (0, chai_1.expect)(errored).to.be.true;
    });
    it('should handle an error with observer', function () {
        var errored = false;
        (0, rxjs_1.throwError)(function () { return 'bad'; })
            .pipe((0, operators_1.tap)({
            error: function (err) {
                (0, chai_1.expect)(err).to.equal('bad');
            },
        }))
            .subscribe({
            error: function (err) {
                errored = true;
                (0, chai_1.expect)(err).to.equal('bad');
            },
        });
        (0, chai_1.expect)(errored).to.be.true;
    });
    it('should handle complete with observer', function () {
        var completed = false;
        rxjs_1.EMPTY.pipe((0, operators_1.tap)({
            complete: function () {
                completed = true;
            },
        })).subscribe();
        (0, chai_1.expect)(completed).to.be.true;
    });
    it('should handle next with observer', function () {
        var value = null;
        (0, rxjs_1.of)('hi')
            .pipe((0, operators_1.tap)({
            next: function (x) {
                value = x;
            },
        }))
            .subscribe();
        (0, chai_1.expect)(value).to.equal('hi');
    });
    it('should raise error if next handler raises error', function () {
        (0, rxjs_1.of)('hi')
            .pipe((0, operators_1.tap)({
            next: function () {
                throw new Error('bad');
            },
        }))
            .subscribe({
            error: function (err) {
                (0, chai_1.expect)(err.message).to.equal('bad');
            },
        });
    });
    it('should raise error if error handler raises error', function () {
        (0, rxjs_1.throwError)(function () { return 'ops'; })
            .pipe((0, operators_1.tap)({
            error: function () {
                throw new Error('bad');
            },
        }))
            .subscribe({
            error: function (err) {
                (0, chai_1.expect)(err.message).to.equal('bad');
            },
        });
    });
    it('should raise error if complete handler raises error', function () {
        rxjs_1.EMPTY.pipe((0, operators_1.tap)({
            complete: function () {
                throw new Error('bad');
            },
        })).subscribe({
            error: function (err) {
                (0, chai_1.expect)(err.message).to.equal('bad');
            },
        });
    });
    it('should allow unsubscribing explicitly and early', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --1--2--3--#');
            var unsub = '   -------!    ';
            var e1subs = '  ^------!    ';
            var expected = '--1--2--    ';
            var result = e1.pipe((0, operators_1.tap)(function () {
            }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  --1--2--3--#');
            var e1subs = '  ^------!    ';
            var expected = '--1--2--    ';
            var unsub = '   -------!    ';
            var result = e1.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.tap)(function () {
            }), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should mirror multiple values and complete', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' --1--2--3--|');
            var e1subs = '  ^----------!';
            var expected = '--1--2--3--|';
            var result = e1.pipe((0, operators_1.tap)(function () {
            }));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should mirror multiple values and terminate with error', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' --1--2--3--#');
            var e1subs = '  ^----------!';
            var expected = '--1--2--3--#';
            var result = e1.pipe((0, operators_1.tap)(function () {
            }));
            expectObservable(result).toBe(expected);
            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.tap)(function () {
        }), (0, operators_1.take)(3))
            .subscribe(function () {
        });
        (0, chai_1.expect)(sideEffects).to.deep.equal([0, 1, 2]);
    });
    describe('lifecycle handlers', function () {
        it('should support an unsubscribe event that fires before finalize', function () {
            var results = [];
            var subject = new rxjs_1.Subject();
            var subscription = subject
                .pipe((0, operators_1.tap)({
                subscribe: function () { return results.push('subscribe'); },
                next: function (value) { return results.push("next ".concat(value)); },
                error: function (err) { return results.push("error: ".concat(err.message)); },
                complete: function () { return results.push('complete'); },
                unsubscribe: function () { return results.push('unsubscribe'); },
                finalize: function () { return results.push('finalize'); },
            }))
                .subscribe();
            subject.next(1);
            subject.next(2);
            (0, chai_1.expect)(results).to.deep.equal(['subscribe', 'next 1', 'next 2']);
            subscription.unsubscribe();
            (0, chai_1.expect)(results).to.deep.equal(['subscribe', 'next 1', 'next 2', 'unsubscribe', 'finalize']);
        });
        it('should not call unsubscribe if source completes', function () {
            var results = [];
            var subject = new rxjs_1.Subject();
            var subscription = subject
                .pipe((0, operators_1.tap)({
                subscribe: function () { return results.push('subscribe'); },
                next: function (value) { return results.push("next ".concat(value)); },
                error: function (err) { return results.push("error: ".concat(err.message)); },
                complete: function () { return results.push('complete'); },
                unsubscribe: function () { return results.push('unsubscribe'); },
                finalize: function () { return results.push('finalize'); },
            }))
                .subscribe();
            subject.next(1);
            subject.next(2);
            (0, chai_1.expect)(results).to.deep.equal(['subscribe', 'next 1', 'next 2']);
            subject.complete();
            subscription.unsubscribe();
            (0, chai_1.expect)(results).to.deep.equal(['subscribe', 'next 1', 'next 2', 'complete', 'finalize']);
        });
        it('should not call unsubscribe if source errors', function () {
            var results = [];
            var subject = new rxjs_1.Subject();
            var subscription = subject
                .pipe((0, operators_1.tap)({
                subscribe: function () { return results.push('subscribe'); },
                next: function (value) { return results.push("next ".concat(value)); },
                error: function (err) { return results.push("error: ".concat(err.message)); },
                complete: function () { return results.push('complete'); },
                unsubscribe: function () { return results.push('unsubscribe'); },
                finalize: function () { return results.push('finalize'); },
            }))
                .subscribe({
                error: rxjs_1.noop,
            });
            subject.next(1);
            subject.next(2);
            (0, chai_1.expect)(results).to.deep.equal(['subscribe', 'next 1', 'next 2']);
            subject.error(new Error('bad'));
            subscription.unsubscribe();
            (0, chai_1.expect)(results).to.deep.equal(['subscribe', 'next 1', 'next 2', 'error: bad', 'finalize']);
        });
    });
});
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