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<div class="content" data-ice="content"><h1 data-ice="title">spec-js/operators/pluck-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 {pluck} */
describe('Observable.prototype.pluck', function () {
asDiagram('pluck(\'v\')')('should dematerialize an Observable', function () {
var values = {
a: '{v:1}',
b: '{v:2}',
c: '{v:3}'
};
var e1 = cold('--a--b--c--|', values);
var expected = '--x--y--z--|';
var result = e1.map(function (x) { return ({ v: x.charAt(3) }); }).pluck('v');
expectObservable(result).toBe(expected, { x: '1', y: '2', z: '3' });
});
it('should work for one object', function () {
var a = cold('--x--|', { x: { prop: 42 } });
var asubs = '^ !';
var expected = '--y--|';
var r = a.pluck('prop');
expectObservable(r).toBe(expected, { y: 42 });
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should work for multiple objects', function () {
var inputs = {
a: { prop: '1' },
b: { prop: '2' },
c: { prop: '3' },
d: { prop: '4' },
e: { prop: '5' },
};
var a = cold('--a-b--c-d---e-|', inputs);
var asubs = '^ !';
var expected = '--1-2--3-4---5-|';
var r = a.pluck('prop');
expectObservable(r).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should work with deep nested properties', function () {
var inputs = {
a: { a: { b: { c: '1' } } },
b: { a: { b: { c: '2' } } },
c: { a: { b: { c: '3' } } },
d: { a: { b: { c: '4' } } },
e: { a: { b: { c: '5' } } },
};
var a = cold('--a-b--c-d---e-|', inputs);
var asubs = '^ !';
var expected = '--1-2--3-4---5-|';
var r = a.pluck('a', 'b', 'c');
expectObservable(r).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should work with edge cases of deep nested properties', function () {
var inputs = {
a: { a: { b: { c: 1 } } },
b: { a: { b: 2 } },
c: { a: { c: { c: 3 } } },
d: {},
e: { a: { b: { c: 5 } } },
};
var a = cold('--a-b--c-d---e-|', inputs);
var asubs = '^ !';
var expected = '--r-x--y-z---w-|';
var values = { r: 1, x: undefined, y: undefined, z: undefined, w: 5 };
var r = a.pluck('a', 'b', 'c');
expectObservable(r).toBe(expected, values);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should throw an error if not property is passed', function () {
chai_1.expect(function () {
Observable.of({ prop: 1 }, { prop: 2 }).pluck();
}).to.throw(Error, 'list of properties cannot be empty.');
});
it('should propagate errors from observable that emits only errors', function () {
var a = cold('#');
var asubs = '(^!)';
var expected = '#';
var r = a.pluck('whatever');
expectObservable(r).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should propagate errors from observable that emit values', function () {
var a = cold('--a--b--#', { a: { prop: '1' }, b: { prop: '2' } }, 'too bad');
var asubs = '^ !';
var expected = '--1--2--#';
var r = a.pluck('prop');
expectObservable(r).toBe(expected, undefined, 'too bad');
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should not pluck an empty observable', function () {
var a = cold('|');
var asubs = '(^!)';
var expected = '|';
var invoked = 0;
var r = a
.pluck('whatever')
.do(null, null, function () {
chai_1.expect(invoked).to.equal(0);
});
expectObservable(r).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should allow unsubscribing explicitly and early', function () {
var a = cold('--a--b--c--|', { a: { prop: '1' }, b: { prop: '2' } });
var unsub = ' ! ';
var asubs = '^ ! ';
var expected = '--1--2- ';
var r = a.pluck('prop');
expectObservable(r, unsub).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should pluck twice', function () {
var inputs = {
a: { a: { b: { c: '1' } } },
b: { a: { b: { c: '2' } } },
c: { a: { b: { c: '3' } } },
d: { a: { b: { c: '4' } } },
e: { a: { b: { c: '5' } } },
};
var a = cold('--a-b--c-d---e-|', inputs);
var asubs = '^ !';
var expected = '--1-2--3-4---5-|';
var r = a.pluck('a', 'b').pluck('c');
expectObservable(r).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should not break unsubscription chain when unsubscribed explicitly', function () {
var a = cold('--a--b--c--|', { a: { prop: '1' }, b: { prop: '2' } });
var unsub = ' ! ';
var asubs = '^ ! ';
var expected = '--1--2- ';
var r = a
.mergeMap(function (x) { return Observable.of(x); })
.pluck('prop')
.mergeMap(function (x) { return Observable.of(x); });
expectObservable(r, unsub).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
});
//# sourceMappingURL=pluck-spec.js.map</code></pre>
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