@reactivex/rxjs
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Reactive Extensions for modern JavaScript
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<div class="content" data-ice="content"><h1 data-ice="title">spec-js/operators/mergeMap-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 {mergeMap} */
describe('Observable.prototype.mergeMap', function () {
asDiagram('mergeMap(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-yzyz-z---|';
var values = { x: 10, y: 30, z: 50 };
var result = e1.mergeMap(function (x) { return e2.map(function (i) { return i * x; }); });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many regular interval inners', function () {
var a = cold('----a---a---a---(a|) ');
var b = cold('----b---b---(b|) ');
var c = cold('----c---c---c---c---(c|)');
var d = cold('----(d|) ');
var e1 = hot('a---b-----------c-------d-------| ');
var e1subs = '^ ! ';
var expected = '----a---(ab)(ab)(ab)c---c---(cd)c---(c|)';
var observableLookup = { a: a, b: b, c: c, d: d };
var source = e1.mergeMap(function (value) { return observableLookup[value]; });
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should map values to constant resolved promises and merge', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var project = function (value) { return Observable.from(Promise.resolve(42)); };
var results = [];
source.mergeMap(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 merge', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var project = function (value) {
return Observable.from(Promise.reject(42));
};
source.mergeMap(project).subscribe(function (x) {
done(new Error('Subscriber next handler not supposed to be called.'));
}, function (err) {
chai_1.expect(err).to.equal(42);
done();
}, function () {
done(new Error('Subscriber complete handler not supposed to be called.'));
});
});
it('should map values to resolved promises and merge', 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.mergeMap(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 merge', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var project = function (value, index) {
return Observable.from(Promise.reject('' + value + '-' + index));
};
source.mergeMap(project).subscribe(function (x) {
done(new Error('Subscriber next handler not supposed to be called.'));
}, function (err) {
chai_1.expect(err).to.equal('4-0');
done();
}, function () {
done(new Error('Subscriber complete handler not supposed to be called.'));
});
});
it('should mergeMap 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.mergeMap(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 mergeMap 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.mergeMap(project, resultSelector).subscribe(function (x) {
done(new Error('Subscriber next handler not supposed to be called.'));
}, function (err) {
chai_1.expect(err).to.equal('4-0');
done();
}, function () {
done(new Error('Subscriber complete handler not supposed to be called.'));
});
});
it('should mergeMap 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---(ki)(lj)(ki)(lj)(ki)(lj)k---l---|';
var result = e1.mergeMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap 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 expected = '-----i---j---(ki)(lj)(ki)(lj)(ki)(lj)k---l-------|';
var result = e1.mergeMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap 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-------e---------------f------');
var unsub = ' !';
var e1subs = '^ !';
var inner = cold('----i---j---k---l---| ', values);
var expected = '-----i---j---(ki)(lj)(ki)(lj)(ki)(lj)(ki)(lj)k---l---i--';
var source = e1.mergeMap(function (value) { return inner; });
expectObservable(source, unsub).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a-------b-------c-------d-------e---------------f------');
var e1subs = '^ !';
var inner = cold('----i---j---k---l---| ', values);
var expected = '-----i---j---(ki)(lj)(ki)(lj)(ki)(lj)(ki)(lj)k---l---i--';
var unsub = ' !';
var source = e1
.map(function (x) { return x; })
.mergeMap(function (value) { return inner; })
.map(function (x) { return x; });
expectObservable(source, unsub).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap 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 expected = '-----i---j---(ki)(lj)(ki)(lj)(ki)(lj)k---l-';
var result = e1.mergeMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap 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 expected = '-----i---j---(ki)(lj)(ki)# ';
var result = e1.mergeMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap 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 expected = '-----i---j---(ki)(lj)(ki)(lj)(ki)#';
var result = e1.mergeMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap 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 expected = '-----i---j---(ki)(lj)# ';
var result = e1.mergeMap(function (value) { return inner; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap to many cold Observable, with parameter concurrency=1', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a-------b-------c---| ');
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---|';
function project() { return inner; }
function resultSelector(oV, iV, oI, iI) { return iV; }
var result = e1.mergeMap(project, resultSelector, 1);
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap to many cold Observable, with parameter concurrency=2', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a-------b-------c---| ');
var e1subs = '^ !';
var inner = cold('----i---j---k---l---| ', values);
var innersubs = [' ^ ! ',
' ^ ! ',
' ^ !'];
var expected = '-----i---j---(ki)(lj)k---(li)j---k---l---|';
function project() { return inner; }
function resultSelector(oV, iV, oI, iI) { return iV; }
var result = e1.mergeMap(project, resultSelector, 2);
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap to many hot Observable, with parameter concurrency=1', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a-------b-------c---| ');
var e1subs = '^ !';
var hotA = hot('x----i---j---k---l---| ', values);
var hotB = hot('-x-x-xxxx-x-x-xxxxx-x----i---j---k---l---| ', values);
var hotC = hot('x-xxxx---x-x-x-x-x-xx--x--x-x--x--xxxx-x-----i---j---k---l---|', values);
var asubs = ' ^ ! ';
var bsubs = ' ^ ! ';
var csubs = ' ^ !';
var expected = '-----i---j---k---l-------i---j---k---l-------i---j---k---l---|';
var inners = { a: hotA, b: hotB, c: hotC };
function project(x) { return inners[x]; }
function resultSelector(oV, iV, oI, iI) { return iV; }
var result = e1.mergeMap(project, resultSelector, 1);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(hotA.subscriptions).toBe(asubs);
expectSubscriptions(hotB.subscriptions).toBe(bsubs);
expectSubscriptions(hotC.subscriptions).toBe(csubs);
});
it('should mergeMap to many hot Observable, with parameter concurrency=2', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a-------b-------c---| ');
var e1subs = '^ !';
var hotA = hot('x----i---j---k---l---| ', values);
var hotB = hot('-x-x-xxxx----i---j---k---l---| ', values);
var hotC = hot('x-xxxx---x-x-x-x-x-xx----i---j---k---l---|', values);
var asubs = ' ^ ! ';
var bsubs = ' ^ ! ';
var csubs = ' ^ !';
var expected = '-----i---j---(ki)(lj)k---(li)j---k---l---|';
var inners = { a: hotA, b: hotB, c: hotC };
function project(x) { return inners[x]; }
function resultSelector(oV, iV, oI, iI) { return iV; }
var result = e1.mergeMap(project, resultSelector, 2);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(hotA.subscriptions).toBe(asubs);
expectSubscriptions(hotB.subscriptions).toBe(bsubs);
expectSubscriptions(hotC.subscriptions).toBe(csubs);
});
it('should mergeMap to many cold Observable, with parameter concurrency=1, without resultSelector', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a-------b-------c---| ');
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---|';
function project() { return inner; }
var result = e1.mergeMap(project, 1);
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap to many cold Observable, with parameter concurrency=2, without resultSelector', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a-------b-------c---| ');
var e1subs = '^ !';
var inner = cold('----i---j---k---l---| ', values);
var innersubs = [' ^ ! ',
' ^ ! ',
' ^ !'];
var expected = '-----i---j---(ki)(lj)k---(li)j---k---l---|';
function project() { return inner; }
var result = e1.mergeMap(project, 2);
expectObservable(result).toBe(expected, values);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap to many hot Observable, with parameter concurrency=1, without resultSelector', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a-------b-------c---| ');
var e1subs = '^ !';
var hotA = hot('x----i---j---k---l---| ', values);
var hotB = hot('-x-x-xxxx-x-x-xxxxx-x----i---j---k---l---| ', values);
var hotC = hot('x-xxxx---x-x-x-x-x-xx--x--x-x--x--xxxx-x-----i---j---k---l---|', values);
var asubs = ' ^ ! ';
var bsubs = ' ^ ! ';
var csubs = ' ^ !';
var expected = '-----i---j---k---l-------i---j---k---l-------i---j---k---l---|';
var inners = { a: hotA, b: hotB, c: hotC };
function project(x) { return inners[x]; }
var result = e1.mergeMap(project, 1);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(hotA.subscriptions).toBe(asubs);
expectSubscriptions(hotB.subscriptions).toBe(bsubs);
expectSubscriptions(hotC.subscriptions).toBe(csubs);
});
it('should mergeMap to many hot Observable, with parameter concurrency=2, without resultSelector', function () {
var values = { i: 'foo', j: 'bar', k: 'baz', l: 'qux' };
var e1 = hot('-a-------b-------c---| ');
var e1subs = '^ !';
var hotA = hot('x----i---j---k---l---| ', values);
var hotB = hot('-x-x-xxxx----i---j---k---l---| ', values);
var hotC = hot('x-xxxx---x-x-x-x-x-xx----i---j---k---l---|', values);
var asubs = ' ^ ! ';
var bsubs = ' ^ ! ';
var csubs = ' ^ !';
var expected = '-----i---j---(ki)(lj)k---(li)j---k---l---|';
var inners = { a: hotA, b: hotB, c: hotC };
function project(x) { return inners[x]; }
var result = e1.mergeMap(project, 2);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(hotA.subscriptions).toBe(asubs);
expectSubscriptions(hotB.subscriptions).toBe(bsubs);
expectSubscriptions(hotC.subscriptions).toBe(csubs);
});
it('should mergeMap many complex, where all inners are finite', function () {
var a = cold('-#');
var b = cold('-#');
var c = cold('-2--3--4--5------------------6-|');
var d = cold('-----------2--3|');
var e = cold('-1--------2--3-----4--5--------|');
var f = cold('--|');
var g = cold('---1-2|');
var e1 = hot('-a-b--^-c-----d------e----------------f-----g|');
var e1subs = '^ !';
var expected = '---2--3--4--5---1--2--3--2--3--6--4--5---1-2--|';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.mergeMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many complex, all inners finite except one', function () {
var a = cold('-#');
var b = cold('-#');
var c = cold('-2--3--4--5------------------6-|');
var d = cold('-----------2--3-');
var e = cold('-1--------2--3-----4--5--------|');
var f = cold('--|');
var g = cold('---1-2|');
var e1 = hot('-a-b--^-c-----d------e----------------f-----g|');
var e1subs = '^ ';
var expected = '---2--3--4--5---1--2--3--2--3--6--4--5---1-2----';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.mergeMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many complex, inners finite, outer does not complete', function () {
var a = cold('-#');
var b = cold('-#');
var c = cold('-2--3--4--5------------------6-|');
var d = cold('-----------2--3|');
var e = cold('-1--------2--3-----4--5--------|');
var f = cold('--|');
var g = cold('---1-2|');
var e1 = hot('-a-b--^-c-----d------e----------------f-----g--------');
var e1subs = '^ ';
var expected = '---2--3--4--5---1--2--3--2--3--6--4--5---1-2----';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.mergeMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many complex, all inners finite, and outer throws', function () {
var a = cold('-#');
var b = cold('-#');
var c = cold('-2--3--4--5------------------6-|');
var d = cold('-----------2--3|');
var e = cold('-1--------2--3-----4--5--------|');
var f = cold('--|');
var g = cold('---1-2|');
var e1 = hot('-a-b--^-c-----d------e----------------f-----g# ');
var e1subs = '^ ! ';
var expected = '---2--3--4--5---1--2--3--2--3--6--4--5-# ';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.mergeMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many complex, all inners complete except one throws', function () {
var a = cold('-#');
var b = cold('-#');
var c = cold('-2--3--4--5------------------6-#');
var d = cold('-----------2--3|');
var e = cold('-1--------2--3-----4--5--------|');
var f = cold('--|');
var g = cold('---1-2|');
var e1 = hot('-a-b--^-c-----d------e----------------f-----g|');
var e1subs = '^ ! ';
var expected = '---2--3--4--5---1--2--3--2--3--6-# ';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var result = e1.mergeMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many complex, all inners finite, outer is unsubscribed', function () {
var a = cold('-#');
var b = cold('-#');
var c = cold('-2--3--4--5------------------6-|');
var d = cold('-----------2--3|');
var e = cold('-1--------2--3-----4--5--------|');
var f = cold('--|');
var g = cold('---1-2|');
var e1 = hot('-a-b--^-c-----d------e----------------f-----g|');
var unsub = ' ! ';
var e1subs = '^ ! ';
var expected = '---2--3--4--5---1--2--3--2--3-- ';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var source = e1.mergeMap(function (value) { return observableLookup[value]; });
expectObservable(source, unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many complex, all inners finite, project throws', function () {
var a = cold('-#');
var b = cold('-#');
var c = cold('-2--3--4--5------------------6-|');
var d = cold('-----------2--3|');
var e = cold('-1--------2--3-----4--5--------|');
var f = cold('--|');
var g = cold('---1-2|');
var e1 = hot('-a-b--^-c-----d------e----------------f-----g|');
var e1subs = '^ ! ';
var expected = '---2--3--4--5--# ';
var observableLookup = { a: a, b: b, c: c, d: d, e: e, f: f, g: g };
var invoked = 0;
var source = e1.mergeMap(function (value) {
invoked++;
if (invoked === 3) {
throw 'error';
}
return observableLookup[value];
});
expectObservable(source).toBe(expected);
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 mergeMap 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 source = e1.mergeMap(function (value) { return arrayRepeat(value, value); });
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many outer to inner arrays, using resultSelector', function () {
var e1 = hot('2-----4--------3--------2-------|');
var e1subs = '^ !';
var expected = '(44)--(8888)---(666)----(44)----|';
var source = e1.mergeMap(function (value) { return arrayRepeat(value, value); }, function (x, y) { return String(parseInt(x) + parseInt(y)); });
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap 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 source = e1.mergeMap(function (value) { return arrayRepeat(value, value); });
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap 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 source = e1.mergeMap(function (value) { return arrayRepeat(value, value); }, function (x, y) { return String(parseInt(x) + parseInt(y)); });
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many outer to inner arrays, outer gets unsubscribed', function () {
var e1 = hot('2-----4--------3--------2-------|');
var unsub = ' ! ';
var e1subs = '^ ! ';
var expected = '(22)--(4444)-- ';
var source = e1.mergeMap(function (value) { return arrayRepeat(value, value); });
expectObservable(source, unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many outer to inner arrays, resultSelector, outer unsubscribed', function () {
var e1 = hot('2-----4--------3--------2-------|');
var unsub = ' ! ';
var e1subs = '^ ! ';
var expected = '(44)--(8888)-- ';
var source = e1.mergeMap(function (value) { return arrayRepeat(value, value); }, function (x, y) { return String(parseInt(x) + parseInt(y)); });
expectObservable(source, unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap 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 source = e1.mergeMap(function (value) {
invoked++;
if (invoked === 3) {
throw 'error';
}
return arrayRepeat(value, value);
});
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap many outer to inner arrays, resultSelector throws', function () {
var e1 = hot('2-----4--------3--------2-------|');
var e1subs = '^ ! ';
var expected = '(44)--(8888)---# ';
var source = e1.mergeMap(function (value) { return arrayRepeat(value, value); }, function (inner, outer) {
if (outer === '3') {
throw 'error';
}
return String(parseInt(outer) + parseInt(inner));
});
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should mergeMap 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 source = e1.mergeMap(function (value) {
invoked++;
if (invoked === 3) {
throw 'error';
}
return arrayRepeat(value, value);
}, function (inner, outer) {
return String(parseInt(outer) + parseInt(inner));
});
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should map and flatten', function () {
var source = Observable.of(1, 2, 3, 4).mergeMap(function (x) { return Observable.of(x + '!'); });
var expected = ['1!', '2!', '3!', '4!'];
var completed = false;
source.subscribe(function (x) {
chai_1.expect(x).to.equal(expected.shift());
}, null, function () {
chai_1.expect(expected.length).to.equal(0);
completed = true;
});
chai_1.expect(completed).to.be.true;
});
it('should map and flatten an Array', function () {
var source = Observable.of(1, 2, 3, 4).mergeMap(function (x) { return [x + '!']; });
var expected = ['1!', '2!', '3!', '4!'];
var completed = false;
source.subscribe(function (x) {
chai_1.expect(x).to.equal(expected.shift());
}, null, function () {
chai_1.expect(expected.length).to.equal(0);
completed = true;
});
chai_1.expect(completed).to.be.true;
});
it('should support type signatures', function () {
type(function () {
var o;
/* tslint:disable:no-unused-variable */
var a1 = o.mergeMap(function (x) { return x.toString(); });
var a2 = o.mergeMap(function (x) { return x.toString(); }, 3);
var a3 = o.mergeMap(function (x) { return x.toString(); }, function (o, i) { return ({ o: o, i: i }); });
var a4 = o.mergeMap(function (x) { return x.toString(); }, function (o, i) { return ({ o: o, i: i }); }, 3);
/* tslint:enable:no-unused-variable */
});
});
});
//# sourceMappingURL=mergeMap-spec.js.map</code></pre>
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