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<div class="content" data-ice="content"><h1 data-ice="title">spec-js/operators/concatMap-spec.js</h1>
<pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {concatMap} */
describe('Observable.prototype.concatMap', function () {
asDiagram('concatMap(i => 10*i\u2014\u201410*i\u2014\u201410*i\u2014| )')('should map-and-flatten each item to an Observable', function () {
var e1 = hot('--1-----3--5-------|');
var e1subs = '^ !';
var e2 = cold('x-x-x| ', { x: 10 });
var expected = '--x-x-x-y-y-yz-z-z-|';
var values = { x: 10, y: 30, z: 50 };
var result = e1.concatMap(function (x) { return e2.map(function (i) { return i * x; }); });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatenate many regular interval inners', function () {
var a = cold('--a-a-a-(a|) ');
var asubs = '^ ! ';
var b = cold('----b--b--(b|) ');
var bsubs = ' ^ ! ';
var c = cold('-c-c-(c|) ');
var csubs = ' ^ ! ';
var d = cold('------(d|)');
var dsubs = ' ^ ! ';
var e1 = hot('a---b--------------------c-d----| ');
var e1subs = '^ ! ';
var expected = '--a-a-a-a---b--b--b-------c-c-c-----(d|)';
var observableLookup = { a: a, b: b, c: c, d: d };
var source = e1.concatMap(function (value) { return observableLookup[value]; });
expectObservable(source).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
expectSubscriptions(b.subscriptions).toBe(bsubs);
expectSubscriptions(c.subscriptions).toBe(csubs);
expectSubscriptions(d.subscriptions).toBe(dsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer values to many inner values', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a---b---c---d---| ');
var e1subs = '^ !';
var inner = cold('--i-j-k-l-| ', values);
var innersubs = [' ^ ! ',
' ^ ! ',
' ^ ! ',
' ^ !'];
var expected = '---i-j-k-l---i-j-k-l---i-j-k-l---i-j-k-l-|';
var result = e1.concatMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle an empty source', function () {
var e1 = cold('|');
var e1subs = '(^!)';
var inner = cold('-1-2-3|');
var innersubs = [];
var expected = '|';
var result = e1.concatMap(function () { return inner; });
expectObservable(result).toBe(expected);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle a never source', function () {
var e1 = cold('-');
var e1subs = '^';
var inner = cold('-1-2-3|');
var innersubs = [];
var expected = '-';
var result = e1.concatMap(function () { return inner; });
expectObservable(result).toBe(expected);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should error immediately if given a just-throw source', function () {
var e1 = cold('#');
var e1subs = '(^!)';
var inner = cold('-1-2-3|');
var innersubs = [];
var expected = '#';
var result = e1.concatMap(function () { return inner; });
expectObservable(result).toBe(expected);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should return a silenced version of the source if the mapped inner is empty', function () {
var e1 = cold('--a-b--c-| ');
var e1subs = '^ ! ';
var inner = cold('|');
var innersubs = [' (^!) ',
' (^!) ',
' (^!)'];
var expected = '---------| ';
var result = e1.concatMap(function () { return inner; });
expectObservable(result).toBe(expected);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should return a never if the mapped inner is never', function () {
var e1 = cold('--a-b--c-|');
var e1subs = '^ ';
var inner = cold('-');
var innersubs = ' ^ ';
var expected = '----------';
var result = e1.concatMap(function () { return inner; });
expectObservable(result).toBe(expected);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should propagate errors if the mapped inner is a just-throw Observable', function () {
var e1 = cold('--a-b--c-|');
var e1subs = '^ ! ';
var inner = cold('#');
var innersubs = ' (^!) ';
var expected = '--# ';
var result = e1.concatMap(function () { return inner; });
expectObservable(result).toBe(expected);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to many inner, complete late', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a---b---c---d----------------------------------|');
var e1subs = '^ !';
var inner = cold('--i-j-k-l-| ', values);
var innersubs = [' ^ ! ',
' ^ ! ',
' ^ ! ',
' ^ ! '];
var expected = '---i-j-k-l---i-j-k-l---i-j-k-l---i-j-k-l--------|';
var result = e1.concatMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to many inner, outer never completes', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a---b---c---d-----------------------------------');
var e1subs = '^ ';
var inner = cold('--i-j-k-l-| ', values);
var innersubs = [' ^ ! ',
' ^ ! ',
' ^ ! ',
' ^ ! '];
var expected = '---i-j-k-l---i-j-k-l---i-j-k-l---i-j-k-l---------';
var result = e1.concatMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to many inner, inner never completes', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a---b---c---d---|');
var e1subs = '^ ';
var inner = cold('--i-j-k-l- ', values);
var innersubs = ' ^ ';
var expected = '---i-j-k-l--------';
var result = e1.concatMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to many inner, and inner throws', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a---b---c---d---|');
var e1subs = '^ ! ';
var inner = cold('--i-j-k-l-# ', values);
var innersubs = ' ^ ! ';
var expected = '---i-j-k-l-# ';
var result = e1.concatMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to many inner, and outer throws', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a---b---c---d---#');
var e1subs = '^ !';
var inner = cold('--i-j-k-l-| ', values);
var innersubs = [' ^ ! ',
' ^ !'];
var expected = '---i-j-k-l---i-j-#';
var result = e1.concatMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to many inner, both inner and outer throw', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a---b---c---d---#');
var e1subs = '^ ! ';
var inner = cold('--i-j-k-l-# ', values);
var innersubs = ' ^ ! ';
var expected = '---i-j-k-l-# ';
var result = e1.concatMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many complex, where all inners are finite', function () {
var a = cold('-# ');
var asubs = [];
var b = cold('-# ');
var bsubs = [];
var c = cold('-2--3--4--5----6-| ');
var csubs = ' ^ ! ';
var d = cold('----2--3| ');
var dsubs = ' ^ ! ';
var e = cold('-1------2--3-4-5---| ');
var esubs = ' ^ ! ';
var f = cold('--| ');
var fsubs = ' ^ ! ';
var g = cold('---1-2|');
var gsubs = ' ^ !';
var e1 = hot('-a-b--^-c-----d------e----------------f-----g| ');
var e1subs = '^ !';
var expected = '---2--3--4--5----6-----2--3-1------2--3-4-5--------1-2|';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.concatMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
expectSubscriptions(b.subscriptions).toBe(bsubs);
expectSubscriptions(c.subscriptions).toBe(csubs);
expectSubscriptions(d.subscriptions).toBe(dsubs);
expectSubscriptions(e.subscriptions).toBe(esubs);
expectSubscriptions(f.subscriptions).toBe(fsubs);
expectSubscriptions(g.subscriptions).toBe(gsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many complex, all inners finite except one', function () {
var a = cold('-# ');
var asubs = [];
var b = cold('-# ');
var bsubs = [];
var c = cold('-2--3--4--5----6-| ');
var csubs = ' ^ ! ';
var d = cold('----2--3- ');
var dsubs = ' ^ ';
var e = cold('-1------2--3-4-5---| ');
var esubs = [];
var f = cold('--| ');
var fsubs = [];
var g = cold('---1-2|');
var gsubs = [];
var e1 = hot('-a-b--^-c-----d------e----------------f-----g| ');
var e1subs = '^ ';
var expected = '---2--3--4--5----6-----2--3----------------------------';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.concatMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
expectSubscriptions(b.subscriptions).toBe(bsubs);
expectSubscriptions(c.subscriptions).toBe(csubs);
expectSubscriptions(d.subscriptions).toBe(dsubs);
expectSubscriptions(e.subscriptions).toBe(esubs);
expectSubscriptions(f.subscriptions).toBe(fsubs);
expectSubscriptions(g.subscriptions).toBe(gsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many complex, inners finite, outer does not complete', function () {
var a = cold('-# ');
var asubs = [];
var b = cold('-# ');
var bsubs = [];
var c = cold('-2--3--4--5----6-| ');
var csubs = ' ^ ! ';
var d = cold('----2--3| ');
var dsubs = ' ^ ! ';
var e = cold('-1------2--3-4-5---| ');
var esubs = ' ^ ! ';
var f = cold('--| ');
var fsubs = ' ^ ! ';
var g = cold('---1-2|');
var gsubs = ' ^ !';
var e1 = hot('-a-b--^-c-----d------e----------------f-----g--- ');
var e1subs = '^ ';
var expected = '---2--3--4--5----6-----2--3-1------2--3-4-5--------1-2-';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.concatMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
expectSubscriptions(b.subscriptions).toBe(bsubs);
expectSubscriptions(c.subscriptions).toBe(csubs);
expectSubscriptions(d.subscriptions).toBe(dsubs);
expectSubscriptions(e.subscriptions).toBe(esubs);
expectSubscriptions(f.subscriptions).toBe(fsubs);
expectSubscriptions(g.subscriptions).toBe(gsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many complex, all inners finite, and outer throws', function () {
var a = cold('-# ');
var asubs = [];
var b = cold('-# ');
var bsubs = [];
var c = cold('-2--3--4--5----6-| ');
var csubs = ' ^ ! ';
var d = cold('----2--3| ');
var dsubs = ' ^ ! ';
var e = cold('-1------2--3-4-5---| ');
var esubs = ' ^ ! ';
var f = cold('--| ');
var fsubs = [];
var g = cold('---1-2|');
var gsubs = [];
var e1 = hot('-a-b--^-c-----d------e----------------f-----g# ');
var e1subs = '^ ! ';
var expected = '---2--3--4--5----6-----2--3-1------2--3# ';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.concatMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
expectSubscriptions(b.subscriptions).toBe(bsubs);
expectSubscriptions(c.subscriptions).toBe(csubs);
expectSubscriptions(d.subscriptions).toBe(dsubs);
expectSubscriptions(e.subscriptions).toBe(esubs);
expectSubscriptions(f.subscriptions).toBe(fsubs);
expectSubscriptions(g.subscriptions).toBe(gsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many complex, all inners complete except one throws', function () {
var a = cold('-# ');
var asubs = [];
var b = cold('-# ');
var bsubs = [];
var c = cold('-2--3--4--5----6-# ');
var csubs = ' ^ ! ';
var d = cold('----2--3| ');
var dsubs = [];
var e = cold('-1------2--3-4-5---| ');
var esubs = [];
var f = cold('--| ');
var fsubs = [];
var g = cold('---1-2|');
var gsubs = [];
var e1 = hot('-a-b--^-c-----d------e----------------f-----g| ');
var e1subs = '^ ! ';
var expected = '---2--3--4--5----6-# ';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.concatMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
expectSubscriptions(b.subscriptions).toBe(bsubs);
expectSubscriptions(c.subscriptions).toBe(csubs);
expectSubscriptions(d.subscriptions).toBe(dsubs);
expectSubscriptions(e.subscriptions).toBe(esubs);
expectSubscriptions(f.subscriptions).toBe(fsubs);
expectSubscriptions(g.subscriptions).toBe(gsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many complex, all inners finite, outer is unsubscribed early', function () {
var a = cold('-# ');
var asubs = [];
var b = cold('-# ');
var bsubs = [];
var c = cold('-2--3--4--5----6-| ');
var csubs = ' ^ ! ';
var d = cold('----2--3| ');
var dsubs = ' ^ ! ';
var e = cold('-1------2--3-4-5---| ');
var esubs = ' ^ ! ';
var f = cold('--| ');
var fsubs = [];
var g = cold('---1-2|');
var gsubs = [];
var e1 = hot('-a-b--^-c-----d------e----------------f-----g| ');
var e1subs = '^ ! ';
var unsub = ' ! ';
var expected = '---2--3--4--5----6-----2--3-1-- ';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.concatMap(function (value) { return observableLookup[value]; });
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
expectSubscriptions(b.subscriptions).toBe(bsubs);
expectSubscriptions(c.subscriptions).toBe(csubs);
expectSubscriptions(d.subscriptions).toBe(dsubs);
expectSubscriptions(e.subscriptions).toBe(esubs);
expectSubscriptions(f.subscriptions).toBe(fsubs);
expectSubscriptions(g.subscriptions).toBe(gsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
var a = cold('-# ');
var asubs = [];
var b = cold('-# ');
var bsubs = [];
var c = cold('-2--3--4--5----6-| ');
var csubs = ' ^ ! ';
var d = cold('----2--3| ');
var dsubs = ' ^ ! ';
var e = cold('-1------2--3-4-5---| ');
var esubs = ' ^ ! ';
var f = cold('--| ');
var fsubs = [];
var g = cold('---1-2|');
var gsubs = [];
var e1 = hot('-a-b--^-c-----d------e----------------f-----g| ');
var e1subs = '^ ! ';
var unsub = ' ! ';
var expected = '---2--3--4--5----6-----2--3-1-- ';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1
.mergeMap(function (x) { return Observable.of(x); })
.concatMap(function (value) { return observableLookup[value]; })
.mergeMap(function (x) { return Observable.of(x); });
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
expectSubscriptions(b.subscriptions).toBe(bsubs);
expectSubscriptions(c.subscriptions).toBe(csubs);
expectSubscriptions(d.subscriptions).toBe(dsubs);
expectSubscriptions(e.subscriptions).toBe(esubs);
expectSubscriptions(f.subscriptions).toBe(fsubs);
expectSubscriptions(g.subscriptions).toBe(gsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many complex, all inners finite, project throws', function () {
var a = cold('-# ');
var asubs = [];
var b = cold('-# ');
var bsubs = [];
var c = cold('-2--3--4--5----6-| ');
var csubs = ' ^ ! ';
var d = cold('----2--3| ');
var dsubs = ' ^ ! ';
var e = cold('-1------2--3-4-5---| ');
var esubs = [];
var f = cold('--| ');
var fsubs = [];
var g = cold('---1-2|');
var gsubs = [];
var e1 = hot('-a-b--^-c-----d------e----------------f-----g| ');
var e1subs = '^ ! ';
var expected = '---2--3--4--5----6-----2--3# ';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.concatMap(function (value) {
if (value === 'e') {
throw 'error';
}
return observableLookup[value];
});
expectObservable(result).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
expectSubscriptions(b.subscriptions).toBe(bsubs);
expectSubscriptions(c.subscriptions).toBe(csubs);
expectSubscriptions(d.subscriptions).toBe(dsubs);
expectSubscriptions(e.subscriptions).toBe(esubs);
expectSubscriptions(f.subscriptions).toBe(fsubs);
expectSubscriptions(g.subscriptions).toBe(gsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
function arrayRepeat(value, times) {
var results = [];
for (var i = 0; i < times; i++) {
results.push(value);
}
return results;
}
it('should concatMap many outer to an array for each value', function () {
var e1 = hot('2-----4--------3--------2-------|');
var e1subs = '^ !';
var expected = '(22)--(4444)---(333)----(22)----|';
var result = e1.concatMap((function (value) { return arrayRepeat(value, value); }));
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to inner arrays, using resultSelector', function () {
var e1 = hot('2-----4--------3--------2-------|');
var e1subs = '^ !';
var expected = '(44)--(8888)---(666)----(44)----|';
var result = e1.concatMap((function (value) { return arrayRepeat(value, value); }), function (x, y) { return String(parseInt(x) + parseInt(y)); });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to inner arrays, and outer throws', function () {
var e1 = hot('2-----4--------3--------2-------#');
var e1subs = '^ !';
var expected = '(22)--(4444)---(333)----(22)----#';
var result = e1.concatMap((function (value) { return arrayRepeat(value, value); }));
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to inner arrays, resultSelector, outer throws', function () {
var e1 = hot('2-----4--------3--------2-------#');
var e1subs = '^ !';
var expected = '(44)--(8888)---(666)----(44)----#';
var result = e1.concatMap((function (value) { return arrayRepeat(value, value); }), function (x, y) { return String(parseInt(x) + parseInt(y)); });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many outer to inner arrays, outer unsubscribed early', function () {
var e1 = hot('2-----4--------3--------2-------|');
var e1subs = '^ ! ';
var unsub = ' ! ';
var expected = '(22)--(4444)-- ';
var result = e1.concatMap((function (value) { return arrayRepeat(value, value); }));
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to inner arrays, resultSelector, outer unsubscribed', function () {
var e1 = hot('2-----4--------3--------2-------|');
var e1subs = '^ ! ';
var unsub = ' ! ';
var expected = '(44)--(8888)-- ';
var result = e1.concatMap((function (value) { return arrayRepeat(value, value); }), function (x, y) { return String(parseInt(x) + parseInt(y)); });
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to inner arrays, project throws', function () {
var e1 = hot('2-----4--------3--------2-------|');
var e1subs = '^ ! ';
var expected = '(22)--(4444)---# ';
var invoked = 0;
var result = e1.concatMap((function (value) {
invoked++;
if (invoked === 3) {
throw 'error';
}
return arrayRepeat(value, value);
}));
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to inner arrays, resultSelector throws', function () {
var e1 = hot('2-----4--------3--------2-------|');
var e1subs = '^ ! ';
var expected = '(44)--(8888)---# ';
var result = e1.concatMap((function (value) { return arrayRepeat(value, value); }), function (inner, outer) {
if (outer === '3') {
throw 'error';
}
return String(parseInt(outer) + parseInt(inner));
});
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMap many outer to inner arrays, resultSelector, project throws', function () {
var e1 = hot('2-----4--------3--------2-------|');
var e1subs = '^ ! ';
var expected = '(44)--(8888)---# ';
var invoked = 0;
var result = e1.concatMap((function (value) {
invoked++;
if (invoked === 3) {
throw 'error';
}
return arrayRepeat(value, value);
}), function (inner, outer) {
return String(parseInt(outer) + parseInt(inner));
});
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should map values to constant resolved promises and concatenate', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var project = function (value) { return Observable.from(Promise.resolve(42)); };
var results = [];
source.concatMap(project).subscribe(function (x) {
results.push(x);
}, function (err) {
done(new Error('Subscriber error handler not supposed to be called.'));
}, function () {
chai_1.expect(results).to.deep.equal([42, 42, 42, 42]);
done();
});
});
it('should map values to constant rejected promises and concatenate', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var project = function (value) { return Observable.from(Promise.reject(42)); };
source.concatMap(project).subscribe(function (x) {
done(new Error('Subscriber next handler not supposed to be called.'));
}, function (err) {
chai_1.expect(err).to.deep.equal(42);
done();
}, function () {
done(new Error('Subscriber complete handler not supposed to be called.'));
});
});
it('should map values to resolved promises and concatenate', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var project = function (value, index) { return Observable.from(Promise.resolve(value + index)); };
var results = [];
source.concatMap(project).subscribe(function (x) {
results.push(x);
}, function (err) {
done(new Error('Subscriber error handler not supposed to be called.'));
}, function () {
chai_1.expect(results).to.deep.equal([4, 4, 4, 4]);
done();
});
});
it('should map values to rejected promises and concatenate', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var project = function (value, index) { return Observable.from(Promise.reject('' + value + '-' + index)); };
source.concatMap(project).subscribe(function (x) {
done(new Error('Subscriber next handler not supposed to be called.'));
}, function (err) {
chai_1.expect(err).to.deep.equal('4-0');
done();
}, function () {
done(new Error('Subscriber complete handler not supposed to be called.'));
});
});
it('should concatMap values to resolved promises with resultSelector', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var resultSelectorCalledWith = [];
var project = function (value, index) { return Observable.from((Promise.resolve([value, index]))); };
var resultSelector = function (outerVal, innerVal, outerIndex, innerIndex) {
resultSelectorCalledWith.push([].slice.call(arguments));
return 8;
};
var results = [];
var expectedCalls = [
[4, [4, 0], 0, 0],
[3, [3, 1], 1, 0],
[2, [2, 2], 2, 0],
[1, [1, 3], 3, 0]
];
source.concatMap(project, resultSelector).subscribe(function (x) {
results.push(x);
}, function (err) {
done(new Error('Subscriber error handler not supposed to be called.'));
}, function () {
chai_1.expect(results).to.deep.equal([8, 8, 8, 8]);
chai_1.expect(resultSelectorCalledWith).to.deep.equal(expectedCalls);
done();
});
});
it('should concatMap values to rejected promises with resultSelector', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var project = function (value, index) { return Observable.from(Promise.reject('' + value + '-' + index)); };
var resultSelector = function () {
throw 'this should not be called';
};
source.concatMap(project, resultSelector).subscribe(function (x) {
done(new Error('Subscriber next handler not supposed to be called.'));
}, function (err) {
chai_1.expect(err).to.deep.equal('4-0');
done();
}, function () {
done(new Error('Subscriber complete handler not supposed to be called.'));
});
});
});
//# sourceMappingURL=concatMap-spec.js.map</code></pre>
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