@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
118 lines • 4.45 kB
JavaScript
;
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {from} */
describe('Observable.from', function () {
asDiagram('from([10, 20, 30])')('should create an observable from an array', function () {
var e1 = Observable.from([10, 20, 30])
.concatMap(function (x, i) { return Observable.of(x).delay(i === 0 ? 0 : 20, rxTestScheduler); });
var expected = 'x-y-(z|)';
expectObservable(e1).toBe(expected, { x: 10, y: 20, z: 30 });
});
it('should throw for non observable object', function () {
var r = function () {
Observable.from({}).subscribe();
};
chai_1.expect(r).to.throw();
});
it('should return T for ObservableLike objects', function () {
type(function () {
/* tslint:disable:no-unused-variable */
var o1 = Observable.from([], Rx.Scheduler.asap);
var o2 = Observable.from(Observable.empty());
var o3 = Observable.from(new Promise(function (resolve) { return resolve(); }));
/* tslint:enable:no-unused-variable */
});
});
it('should return T for arrays', function () {
type(function () {
/* tslint:disable:no-unused-variable */
var o1 = Observable.from([], Rx.Scheduler.asap);
/* tslint:enable:no-unused-variable */
});
});
var fakervable = function () {
var values = [];
for (var _i = 0; _i < arguments.length; _i++) {
values[_i - 0] = arguments[_i];
}
return ((_a = {},
_a[Symbol.observable] = function () { return ({
subscribe: function (observer) {
for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
var value = values_1[_i];
observer.next(value);
}
observer.complete();
}
}); },
_a
));
var _a;
};
var fakerator = function () {
var values = [];
for (var _i = 0; _i < arguments.length; _i++) {
values[_i - 0] = arguments[_i];
}
return ((_a = {},
_a[Symbol.iterator] = function () {
var clone = values.slice();
return {
next: function () { return ({
done: clone.length <= 0,
value: clone.shift()
}); }
};
},
_a
));
var _a;
};
var sources = [
{ name: 'observable', value: Observable.of('x') },
{ name: 'observable-like', value: fakervable('x') },
{ name: 'array', value: ['x'] },
{ name: 'promise', value: Promise.resolve('x') },
{ name: 'iterator', value: fakerator('x') },
{ name: 'array-like', value: (_a = {}, _a[0] = 'x', _a.length = 1, _a) },
{ name: 'string', value: 'x' },
{ name: 'arguments', value: function (x) { return arguments; }('x') },
];
var _loop_1 = function(source) {
it("should accept " + source.name, function (done) {
var nextInvoked = false;
Observable.from(source.value)
.subscribe(function (x) {
nextInvoked = true;
chai_1.expect(x).to.equal('x');
}, function (x) {
done(new Error('should not be called'));
}, function () {
chai_1.expect(nextInvoked).to.equal(true);
done();
});
});
it("should accept " + source.name + " and scheduler", function (done) {
var nextInvoked = false;
Observable.from(source.value, Rx.Scheduler.async)
.subscribe(function (x) {
nextInvoked = true;
chai_1.expect(x).to.equal('x');
}, function (x) {
done(new Error('should not be called'));
}, function () {
chai_1.expect(nextInvoked).to.equal(true);
done();
});
chai_1.expect(nextInvoked).to.equal(false);
});
};
for (var _i = 0, sources_1 = sources; _i < sources_1.length; _i++) {
var source = sources_1[_i];
_loop_1(source);
}
var _a;
});
//# sourceMappingURL=from-spec.js.map