JezK

Edit File: retry-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('retry', function () {
    var rxTest;
    beforeEach(function () {
        rxTest = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should handle a basic source that emits next then errors, count=3', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('--1-2-3-#');
            var subs = [
                '                  ^-------!                ',
                '                  --------^-------!        ',
                '                  ----------------^-------!',
            ];
            var expected = '   --1-2-3---1-2-3---1-2-3-#';
            var result = source.pipe((0, operators_1.retry)(2));
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should retry a number of times, without error, then complete', function (done) {
        var errors = 0;
        var retries = 2;
        new rxjs_1.Observable(function (observer) {
            observer.next(42);
            observer.complete();
        })
            .pipe((0, operators_1.map)(function (x) {
            if (++errors < retries) {
                throw 'bad';
            }
            errors = 0;
            return x;
        }), (0, operators_1.retry)(retries))
            .subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(42);
            },
            error: function () {
                (0, chai_1.expect)('this was called').to.be.true;
            },
            complete: done,
        });
    });
    it('should retry a number of times, then call error handler', function (done) {
        var errors = 0;
        var retries = 2;
        new rxjs_1.Observable(function (observer) {
            observer.next(42);
            observer.complete();
        })
            .pipe((0, operators_1.map)(function () {
            errors += 1;
            throw 'bad';
        }), (0, operators_1.retry)(retries - 1))
            .subscribe({
            next: function () {
                done("shouldn't next");
            },
            error: function () {
                (0, chai_1.expect)(errors).to.equal(2);
                done();
            },
            complete: function () {
                done("shouldn't complete");
            },
        });
    });
    it('should retry a number of times, then call error handler (with resetOnSuccess)', function (done) {
        var errors = 0;
        var retries = 2;
        new rxjs_1.Observable(function (observer) {
            observer.next(42);
            observer.complete();
        })
            .pipe((0, operators_1.map)(function () {
            errors += 1;
            throw 'bad';
        }), (0, operators_1.retry)({ count: retries - 1, resetOnSuccess: true }))
            .subscribe({
            next: function () {
                done("shouldn't next");
            },
            error: function () {
                (0, chai_1.expect)(errors).to.equal(2);
                done();
            },
            complete: function () {
                done("shouldn't complete");
            },
        });
    });
    it('should retry a number of times, then call next handler without error, then retry and complete', function (done) {
        var index = 0;
        var errors = 0;
        var retries = 2;
        (0, rxjs_1.defer)(function () { return (0, rxjs_1.range)(0, 4 - index); })
            .pipe((0, operators_1.mergeMap)(function () {
            index++;
            if (index === 1 || index === 3) {
                errors++;
                return (0, rxjs_1.throwError)(function () { return 'bad'; });
            }
            else {
                return (0, rxjs_1.of)(42);
            }
        }), (0, operators_1.retry)({ count: retries - 1, resetOnSuccess: true }))
            .subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(42);
            },
            error: function () {
                done("shouldn't error");
            },
            complete: function () {
                (0, chai_1.expect)(errors).to.equal(retries);
                done();
            },
        });
    });
    it('should always finalize before starting the next cycle, even when synchronous', function () {
        var results = [];
        var source = new rxjs_1.Observable(function (subscriber) {
            subscriber.next(1);
            subscriber.next(2);
            subscriber.error('bad');
            return function () {
                results.push('finalizer');
            };
        });
        var subscription = source.pipe((0, operators_1.retry)(3)).subscribe({
            next: function (value) { return results.push(value); },
            error: function (err) { return results.push(err); },
        });
        (0, chai_1.expect)(subscription.closed).to.be.true;
        (0, chai_1.expect)(results).to.deep.equal([1, 2, 'finalizer', 1, 2, 'finalizer', 1, 2, 'finalizer', 1, 2, 'bad', 'finalizer']);
    });
    it('should retry a number of times, then call next handler without error, then retry and error', function (done) {
        var index = 0;
        var errors = 0;
        var retries = 2;
        (0, rxjs_1.defer)(function () { return (0, rxjs_1.range)(0, 4 - index); })
            .pipe((0, operators_1.mergeMap)(function () {
            index++;
            if (index === 1 || index === 3) {
                errors++;
                return (0, rxjs_1.throwError)(function () { return 'bad'; });
            }
            else {
                return (0, rxjs_1.of)(42);
            }
        }), (0, operators_1.retry)({ count: retries - 1, resetOnSuccess: false }))
            .subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(42);
            },
            error: function () {
                (0, chai_1.expect)(errors).to.equal(retries);
                done();
            },
            complete: function () {
                done("shouldn't complete");
            },
        });
    });
    it('should retry until successful completion', function (done) {
        var errors = 0;
        var retries = 10;
        new rxjs_1.Observable(function (observer) {
            observer.next(42);
            observer.complete();
        })
            .pipe((0, operators_1.map)(function (x) {
            if (++errors < retries) {
                throw 'bad';
            }
            errors = 0;
            return x;
        }), (0, operators_1.retry)(), (0, operators_1.take)(retries))
            .subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(42);
            },
            error: function () {
                (0, chai_1.expect)('this was called').to.be.true;
            },
            complete: done,
        });
    });
    it('should handle an empty source', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('|  ');
            var subs = '      (^!)';
            var expected = '   |  ';
            var result = source.pipe((0, operators_1.retry)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should handle a never source', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('-');
            var subs = '       ^';
            var expected = '   -';
            var result = source.pipe((0, operators_1.retry)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should return a never observable given an async just-throw source and no count', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable;
            var source = cold('-#                                    ');
            var unsub = '     -------------------------------------!';
            var expected = '  --------------------------------------';
            var result = source.pipe((0, operators_1.retry)());
            expectObservable(result, unsub).toBe(expected);
        });
    });
    it('should handle a basic source that emits next then completes', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = hot('--1--2--^--3--4--5---|');
            var subs = '              ^------------!';
            var expected = '          ---3--4--5---|';
            var result = source.pipe((0, operators_1.retry)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should handle a basic source that emits next but does not complete', function () {
        rxTest.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = hot('--1--2--^--3--4--5---');
            var subs = '              ^------------';
            var expected = '          ---3--4--5---';
            var result = source.pipe((0, operators_1.retry)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should handle a basic source that emits next then errors, no count', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('--1-2-3-#                             ');
            var unsub = '      -------------------------------------!';
            var subs = [
                '                  ^-------!                             ',
                '                  --------^-------!                     ',
                '                  ----------------^-------!             ',
                '                  ------------------------^-------!     ',
                '                  --------------------------------^----!',
            ];
            var expected = '   --1-2-3---1-2-3---1-2-3---1-2-3---1-2-';
            var result = source.pipe((0, operators_1.retry)());
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should handle a source which eventually throws, count=3, and result is unsubscribed early', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('--1-2-3-#     ');
            var unsub = '      -------------!';
            var subs = [
                '                  ^-------!     ',
                '                  --------^----!',
            ];
            var expected = '   --1-2-3---1-2-';
            var result = source.pipe((0, operators_1.retry)(3));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should not break unsubscription chain when unsubscribed explicitly', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('--1-2-3-#     ');
            var subs = [
                '                  ^-------!     ',
                '                  --------^----!',
            ];
            var expected = '   --1-2-3---1-2-';
            var unsub = '      -------------!';
            var result = source.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.retry)(100), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    it('should retry a synchronous source (multicasted and refCounted) multiple times', function (done) {
        var expected = [1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3];
        (0, rxjs_1.of)(1, 2, 3)
            .pipe((0, operators_1.concat)((0, rxjs_1.throwError)(function () { return 'bad!'; })), (0, operators_1.multicast)(function () { return new rxjs_1.Subject(); }), (0, operators_1.refCount)(), (0, operators_1.retry)(4))
            .subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(expected.shift());
            },
            error: function (err) {
                (0, chai_1.expect)(err).to.equal('bad!');
                (0, chai_1.expect)(expected.length).to.equal(0);
                done();
            },
            complete: function () {
                done(new Error('should not be called'));
            },
        });
    });
    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.retry)(1), (0, operators_1.take)(3)).subscribe(function () {
        });
        (0, chai_1.expect)(sideEffects).to.deep.equal([0, 1, 2]);
    });
    it('should not alter the source when the number of retries is smaller than 1', function () {
        rxTest.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('--1-2-3-# ');
            var subs = ['      ^-------! '];
            var expected = '   --1-2-3-# ';
            var unsub = '      ---------!';
            var result = source.pipe((0, operators_1.retry)(0));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(subs);
        });
    });
    describe('with delay config', function () {
        describe('of a number', function () {
            it('should delay the retry by a specified amount of time', function () {
                rxTest.run(function (_a) {
                    var cold = _a.cold, time = _a.time, expectSubscriptions = _a.expectSubscriptions, expectObservable = _a.expectObservable;
                    var source = cold('---a---b---#');
                    var t = time('                ----|');
                    var subs = [
                        '                  ^----------!',
                        '                  ---------------^----------!',
                        '                  ------------------------------^----------!',
                        '                  ---------------------------------------------^----!',
                    ];
                    var unsub = '      ^-------------------------------------------------!';
                    var expected = '   ---a---b----------a---b----------a---b----------a--';
                    var result = source.pipe((0, operators_1.retry)({
                        delay: t,
                    }));
                    expectObservable(result, unsub).toBe(expected);
                    expectSubscriptions(source.subscriptions).toBe(subs);
                });
            });
            it('should act like a normal retry if delay is set to 0', function () {
                rxTest.run(function (_a) {
                    var cold = _a.cold, expectSubscriptions = _a.expectSubscriptions, expectObservable = _a.expectObservable;
                    var source = cold('---a---b---#');
                    var subs = [
                        '                  ^----------!',
                        '                  -----------^----------!',
                        '                  ----------------------^----------!',
                        '                  ---------------------------------^----!',
                    ];
                    var unsub = '      ^-------------------------------------!';
                    var expected = '   ---a---b------a---b------a---b------a--';
                    var result = source.pipe((0, operators_1.retry)({
                        delay: 0,
                    }));
                    expectObservable(result, unsub).toBe(expected);
                    expectSubscriptions(source.subscriptions).toBe(subs);
                });
            });
            it('should act like a normal retry if delay is less than 0', function () {
                rxTest.run(function (_a) {
                    var cold = _a.cold, expectSubscriptions = _a.expectSubscriptions, expectObservable = _a.expectObservable;
                    var source = cold('---a---b---#');
                    var subs = [
                        '                  ^----------!',
                        '                  -----------^----------!',
                        '                  ----------------------^----------!',
                        '                  ---------------------------------^----!',
                    ];
                    var unsub = '      ^-------------------------------------!';
                    var expected = '   ---a---b------a---b------a---b------a--';
                    var result = source.pipe((0, operators_1.retry)({
                        delay: -100,
                    }));
                    expectObservable(result, unsub).toBe(expected);
                    expectSubscriptions(source.subscriptions).toBe(subs);
                });
            });
            it('should honor count as the max retries', function () {
                rxTest.run(function (_a) {
                    var cold = _a.cold, time = _a.time, expectSubscriptions = _a.expectSubscriptions, expectObservable = _a.expectObservable;
                    var source = cold('---a---b---#');
                    var t = time('                ----|');
                    var subs = [
                        '                  ^----------!',
                        '                  ---------------^----------!',
                        '                  ------------------------------^----------!',
                    ];
                    var expected = '   ---a---b----------a---b----------a---b---#';
                    var result = source.pipe((0, operators_1.retry)({
                        count: 2,
                        delay: t,
                    }));
                    expectObservable(result).toBe(expected);
                    expectSubscriptions(source.subscriptions).toBe(subs);
                });
            });
        });
        describe('of a function', function () {
            it('should delay the retry with a function that returns a notifier', function () {
                rxTest.run(function (_a) {
                    var cold = _a.cold, expectSubscriptions = _a.expectSubscriptions, expectObservable = _a.expectObservable;
                    var source = cold('---a---b---#');
                    var subs = [
                        '                  ^----------!',
                        '                  ------------^----------!',
                        '                  -------------------------^----------!',
                        '                  ---------------------------------------^----!',
                    ];
                    var unsub = '      ^-------------------------------------------!';
                    var expected = '   ---a---b-------a---b--------a---b---------a--';
                    var result = source.pipe((0, operators_1.retry)({
                        delay: function (_err, retryCount) {
                            return (0, rxjs_1.timer)(retryCount);
                        },
                    }));
                    expectObservable(result, unsub).toBe(expected);
                    expectSubscriptions(source.subscriptions).toBe(subs);
                });
            });
            it('should delay the retry with a function that returns a hot observable', function () {
                rxTest.run(function (_a) {
                    var cold = _a.cold, hot = _a.hot, expectSubscriptions = _a.expectSubscriptions, expectObservable = _a.expectObservable;
                    var source = cold(' ---a---b---#');
                    var notifier = hot('--------------x----------------x----------------x------');
                    var subs = [
                        '                   ^----------!',
                        '                   --------------^----------!',
                        '                   -------------------------------^----------!',
                    ];
                    var notifierSubs = [
                        '                   -----------^--!',
                        '                   -------------------------^-----!',
                        '                   ------------------------------------------^-!',
                    ];
                    var unsub = '       ^-------------------------------------------!';
                    var expected = '    ---a---b---------a---b------------a---b------';
                    var result = source.pipe((0, operators_1.retry)({
                        delay: function () { return notifier; },
                    }));
                    expectObservable(result, unsub).toBe(expected);
                    expectSubscriptions(source.subscriptions).toBe(subs);
                    expectSubscriptions(notifier.subscriptions).toBe(notifierSubs);
                });
            });
            it('should complete if the notifier completes', function () {
                rxTest.run(function (_a) {
                    var cold = _a.cold, expectSubscriptions = _a.expectSubscriptions, expectObservable = _a.expectObservable;
                    var source = cold('---a---b---#');
                    var subs = [
                        '                  ^----------!',
                        '                  ------------^----------!',
                        '                  -------------------------^----------!',
                        '                  ------------------------------------!',
                    ];
                    var expected = '   ---a---b-------a---b--------a---b---|';
                    var result = source.pipe((0, operators_1.retry)({
                        delay: function (_err, retryCount) {
                            return retryCount <= 2 ? (0, rxjs_1.timer)(retryCount) : rxjs_1.EMPTY;
                        },
                    }));
                    expectObservable(result).toBe(expected);
                    expectSubscriptions(source.subscriptions).toBe(subs);
                });
            });
            it('should error if the notifier errors', function () {
                rxTest.run(function (_a) {
                    var cold = _a.cold, expectSubscriptions = _a.expectSubscriptions, expectObservable = _a.expectObservable;
                    var source = cold('---a---b---#');
                    var subs = [
                        '                  ^----------!',
                        '                  ------------^----------!',
                        '                  -------------------------^----------!',
                        '                  ------------------------------------!',
                    ];
                    var expected = '   ---a---b-------a---b--------a---b---#';
                    var result = source.pipe((0, operators_1.retry)({
                        delay: function (_err, retryCount) {
                            return retryCount <= 2 ? (0, rxjs_1.timer)(retryCount) : (0, rxjs_1.throwError)(function () { return new Error('blah'); });
                        },
                    }));
                    expectObservable(result).toBe(expected, undefined, new Error('blah'));
                    expectSubscriptions(source.subscriptions).toBe(subs);
                });
            });
            it('should error if the delay function throws', function () {
                rxTest.run(function (_a) {
                    var cold = _a.cold, expectSubscriptions = _a.expectSubscriptions, expectObservable = _a.expectObservable;
                    var source = cold('---a---b---#');
                    var subs = [
                        '                  ^----------!',
                        '                  ------------^----------!',
                        '                  -------------------------^----------!',
                        '                  ------------------------------------!',
                    ];
                    var expected = '   ---a---b-------a---b--------a---b---#';
                    var result = source.pipe((0, operators_1.retry)({
                        delay: function (_err, retryCount) {
                            if (retryCount <= 2) {
                                return (0, rxjs_1.timer)(retryCount);
                            }
                            else {
                                throw new Error('blah');
                            }
                        },
                    }));
                    expectObservable(result).toBe(expected, undefined, new Error('blah'));
                    expectSubscriptions(source.subscriptions).toBe(subs);
                });
            });
            it('should be usable for exponential backoff', function () {
                rxTest.run(function (_a) {
                    var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
                    var source = cold('---a---#');
                    var subs = [
                        '                  ^------!',
                        '                  ---------^------!',
                        '                  --------------------^------!',
                        '                  -----------------------------------^------!',
                    ];
                    var expected = '   ---a--------a----------a--------------a---#';
                    var result = source.pipe((0, operators_1.retry)({
                        count: 3,
                        delay: function (_err, retryCount) { return (0, rxjs_1.timer)(Math.pow(2, retryCount)); },
                    }));
                    expectObservable(result).toBe(expected);
                    expectSubscriptions(source.subscriptions).toBe(subs);
                });
            });
        });
    });
});
//# sourceMappingURL=retry-spec.js.map

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