@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
78 lines • 2.76 kB
JavaScript
;
/** @test {pairwise} */
describe('Observable.prototype.pairwise', function () {
asDiagram('pairwise')('should group consecutive emissions as arrays of two', function () {
var e1 = hot('--a--b-c----d--e---|');
var expected = '-----u-v----w--x---|';
var values = {
u: ['a', 'b'],
v: ['b', 'c'],
w: ['c', 'd'],
x: ['d', 'e']
};
var source = e1.pairwise();
expectObservable(source).toBe(expected, values);
});
it('should pairwise things', function () {
var e1 = hot('--a--^--b--c--d--e--f--g--|');
var e1subs = '^ !';
var expected = '------v--w--x--y--z--|';
var values = {
v: ['b', 'c'],
w: ['c', 'd'],
x: ['d', 'e'],
y: ['e', 'f'],
z: ['f', 'g']
};
var source = e1.pairwise();
expectObservable(source).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should not emit on single-element streams', function () {
var e1 = hot('-----^--b----|');
var e1subs = '^ !';
var expected = '--------|';
var values = {};
var source = e1.pairwise();
expectObservable(source).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle mid-stream throw', function () {
var e1 = hot('--a--^--b--c--d--e--#');
var e1subs = '^ !';
var expected = '------v--w--x--#';
var values = {
v: ['b', 'c'],
w: ['c', 'd'],
x: ['d', 'e']
};
var source = e1.pairwise();
expectObservable(source).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle empty', function () {
var e1 = cold('|');
var e1subs = '(^!)';
var expected = '|';
var source = e1.pairwise();
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle never', function () {
var e1 = cold('-');
var e1subs = '^';
var expected = '-';
var source = e1.pairwise();
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle throw', function () {
var e1 = cold('#');
var e1subs = '(^!)';
var expected = '#';
var source = e1.pairwise();
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});
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