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<div class="content" data-ice="content"><h1 data-ice="title">spec-js/operators/concatMapTo-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 {concatMapTo} */
describe('Observable.prototype.concatMapTo', function () {
asDiagram('concatMapTo( 10\u2014\u201410\u2014\u201410\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-x-x-xx-x-x-|';
var values = { x: 10 };
var result = e1.concatMapTo(e2);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should concatMapTo 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.concatMapTo(inner);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
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.concatMapTo(inner);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
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.concatMapTo(inner);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
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.concatMapTo(inner);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
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.concatMapTo(inner);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
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.concatMapTo(inner);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
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.concatMapTo(inner);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
it('should concatMapTo 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.concatMapTo(inner);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
it('should concatMapTo 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.concatMapTo(inner);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
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---| ');
var e1subs = '^ !';
var inner = cold('--i-j-k-l-| ', values);
var innersubs = [' ^ ! ',
' ^ !'];
var expected = '---i-j-k-l---i-j-k-';
var unsub = ' !';
var result = e1
.mergeMap(function (x) { return Observable.of(x); })
.concatMapTo(inner)
.mergeMap(function (x) { return Observable.of(x); });
expectObservable(result, unsub).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
it('should concatMapTo 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.concatMapTo(inner);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
it('should concatMapTo 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.concatMapTo(inner);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
it('should concatMapTo 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.concatMapTo(inner);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
it('should concatMapTo 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.concatMapTo(inner);
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(inner.subscriptions).toBe(innersubs);
});
it('should concatMapTo many outer to an array', function () {
var e1 = hot('2-----4--------3--------2-------|');
var expected = '(0123)(0123)---(0123)---(0123)--|';
var result = e1.concatMapTo(['0', '1', '2', '3']);
expectObservable(result).toBe(expected);
});
it('should concatMapTo many outer to inner arrays, using resultSelector', function () {
var e1 = hot('2-----4--------3--------2-------|');
var expected = '(2345)(4567)---(3456)---(2345)--|';
var result = e1.concatMapTo(['0', '1', '2', '3'], function (x, y) { return String(parseInt(x) + parseInt(y)); });
expectObservable(result).toBe(expected);
});
it('should concatMapTo many outer to inner arrays, and outer throws', function () {
var e1 = hot('2-----4--------3--------2-------#');
var expected = '(0123)(0123)---(0123)---(0123)--#';
var result = e1.concatMapTo(['0', '1', '2', '3']);
expectObservable(result).toBe(expected);
});
it('should concatMapTo many outer to inner arrays, resultSelector, outer throws', function () {
var e1 = hot('2-----4--------3--------2-------#');
var expected = '(2345)(4567)---(3456)---(2345)--#';
var result = e1.concatMapTo(['0', '1', '2', '3'], function (x, y) { return String(parseInt(x) + parseInt(y)); });
expectObservable(result).toBe(expected);
});
it('should mergeMap many outer to inner arrays, outer unsubscribed early', function () {
var e1 = hot('2-----4--------3--------2-------|');
var unsub = ' !';
var expected = '(0123)(0123)--';
var result = e1.concatMapTo(['0', '1', '2', '3']);
expectObservable(result, unsub).toBe(expected);
});
it('should concatMapTo many outer to inner arrays, resultSelector, outer unsubscribed', function () {
var e1 = hot('2-----4--------3--------2-------|');
var unsub = ' !';
var expected = '(2345)(4567)--';
var result = e1.concatMapTo(['0', '1', '2', '3'], function (x, y) { return String(parseInt(x) + parseInt(y)); });
expectObservable(result, unsub).toBe(expected);
});
it('should concatMapTo many outer to inner arrays, resultSelector throws', function () {
var e1 = hot('2-----4--------3--------2-------|');
var expected = '(2345)(4567)---#';
var result = e1.concatMapTo(['0', '1', '2', '3'], function (x, y) {
if (x === '3') {
throw 'error';
}
return String(parseInt(x) + parseInt(y));
});
expectObservable(result).toBe(expected);
});
it('should map values to constant resolved promises and concatenate', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var results = [];
source.concatMapTo(Observable.from(Promise.resolve(42))).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]);
source.concatMapTo(Observable.from(Promise.reject(42))).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 concatMapTo values to resolved promises with resultSelector', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var resultSelectorCalledWith = [];
var inner = Observable.from(Promise.resolve(42));
var resultSelector = function (outerVal, innerVal, outerIndex, innerIndex) {
resultSelectorCalledWith.push([].slice.call(arguments));
return 8;
};
var results = [];
var expectedCalls = [
[4, 42, 0, 0],
[3, 42, 1, 0],
[2, 42, 2, 0],
[1, 42, 3, 0]
];
source.concatMapTo(inner, 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 concatMapTo values to rejected promises with resultSelector', function (done) {
var source = Rx.Observable.from([4, 3, 2, 1]);
var inner = Observable.from(Promise.reject(42));
var resultSelector = function () {
throw 'this should not be called';
};
source.concatMapTo(inner, resultSelector).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.'));
});
});
});
//# sourceMappingURL=concatMapTo-spec.js.map</code></pre>
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