/
window-spec.ts
323 lines (275 loc) · 12.9 KB
/
window-spec.ts
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import { window, mergeMap, take } from 'rxjs/operators';
import { TestScheduler } from 'rxjs/testing';
import { EMPTY, of, Observable, interval } from 'rxjs';
import { observableMatcher } from '../helpers/observableMatcher';
import { expect } from 'chai';
/** @test {window} */
describe('window', () => {
let rxTestScheduler: TestScheduler;
beforeEach(() => {
rxTestScheduler = new TestScheduler(observableMatcher);
});
it('should emit windows that close and reopen', () => {
rxTestScheduler.run(({ hot, cold, expectObservable, expectSubscriptions }) => {
const source = hot(' ---a---b---c---d---e---f---g---h---i---| ');
const sourceSubs = ' ^--------------------------------------! ';
const closings = hot('-------------w------------w----------------|');
const closingSubs = ' ^--------------------------------------! ';
const expected = ' x------------y------------z------------| ';
const x = cold(' ---a---b---c-| ');
const y = cold(' --d---e---f--| ');
const z = cold(' -g---h---i---| ');
const expectedValues = { x: x, y: y, z: z };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should return a single empty window if source is empty and closings are basic', () => {
rxTestScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const source = cold(' | ');
const sourceSubs = ' (^!) ';
const closings = cold('--x--x--|');
const closingSubs = ' (^!) ';
const expected = ' (w|) ';
const w = cold(' | ');
const expectedValues = { w: w };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should return a single empty window if source is empty and closing is empty', () => {
rxTestScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const source = cold(' | ');
const sourceSubs = ' (^!)';
const closings = cold('| ');
const closingSubs = ' (^!)';
const expected = ' (w|)';
const w = cold(' | ');
const expectedValues = { w: w };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should return a single empty window if source is sync empty and closing is sync empty', () => {
rxTestScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const source = cold(' (|) ');
const sourceSubs = ' (^!)';
const expected = ' (w|)';
const w = cold(' | ');
const expectedValues = { w: w };
const result = source.pipe(window(EMPTY));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
// expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should split a Just source into a single window identical to source, using a Never closing', () => {
rxTestScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const source = cold(' (a|)');
const sourceSubs = ' (^!)';
const closings = cold('- ');
const closingSubs = ' (^!)';
const expected = ' (w|)';
const w = cold(' (a|)');
const expectedValues = { w: w };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should return a single Never window if source is Never', () => {
rxTestScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const source = cold(' ------');
const sourceSubs = ' ^-----';
const closings = cold('------');
const closingSubs = ' ^-----';
const expected = ' w-----';
const w = cold(' ------');
const expectedValues = { w: w };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should be able to split a never Observable into timely empty windows', () => {
rxTestScheduler.run(({ hot, cold, expectObservable, expectSubscriptions }) => {
const source = hot(' ^--------');
const sourceSubs = ' ^--------';
const closings = cold('--x--x--|');
const closingSubs = ' ^-------!';
const expected = ' a-b--c---';
const a = cold(' --| ');
const b = cold(' ---| ');
const c = cold(' ----');
const expectedValues = { a: a, b: b, c: c };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should emit an error-only window if outer is a simple throw-Observable', () => {
rxTestScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const source = cold(' # ');
const sourceSubs = ' (^!) ';
const closings = cold('--x--x--|');
const closingSubs = ' (^!) ';
const expected = ' (w#) ';
const w = cold(' # ');
const expectedValues = { w: w };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should handle basic case with window closings', () => {
rxTestScheduler.run(({ hot, cold, expectObservable, expectSubscriptions }) => {
const source = hot('-1-2-^3-4-5-6-7-8-9-| ');
const subs = ' ^--------------! ';
const closings = hot('---^---x---x---x---x---x---|');
const closingSubs = ' ^--------------! ';
const expected = ' a---b---c---d--| ';
const a = cold(' -3-4| ');
const b = cold(' -5-6| ');
const c = cold(' -7-8| ');
const d = cold(' -9-| ');
const expectedValues = { a: a, b: b, c: c, d: d };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(subs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should handle basic case with window closings, but outer throws', () => {
rxTestScheduler.run(({ hot, cold, expectObservable, expectSubscriptions }) => {
const source = hot('-1-2-^3-4-5-6-7-8-9-# ');
const subs = ' ^--------------! ';
const closings = hot('---^---x---x---x---x---x---|');
const closingSubs = ' ^--------------! ';
const expected = ' a---b---c---d--# ';
const a = cold(' -3-4| ');
const b = cold(' -5-6| ');
const c = cold(' -7-8| ');
const d = cold(' -9-# ');
const expectedValues = { a: a, b: b, c: c, d: d };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(subs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should stop emitting windows when outer is unsubscribed early', () => {
rxTestScheduler.run(({ hot, cold, expectObservable, expectSubscriptions }) => {
const source = hot('-1-2-^3-4-5-6-7-8-9-| ');
const subs = ' ^-------! ';
const closings = hot('---^---x---x---x---x---x---|');
const closingSubs = ' ^-------! ';
const expected = ' a---b---- ';
const a = cold(' -3-4| ');
const b = cold(' -5-6 ');
const unsub = ' --------! ';
const expectedValues = { a: a, b: b };
const result = source.pipe(window(closings));
expectObservable(result, unsub).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(subs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should not break unsubscription chains when result is unsubscribed explicitly', () => {
rxTestScheduler.run(({ hot, cold, expectObservable, expectSubscriptions }) => {
const source = hot('-1-2-^3-4-5-6-7-8-9-| ');
const subs = ' ^-------! ';
const closings = hot('---^---x---x---x---x---x---|');
const closingSubs = ' ^-------! ';
const expected = ' a---b---- ';
const a = cold(' -3-4| ');
const b = cold(' -5-6- ');
const unsub = ' --------! ';
const expectedValues = { a: a, b: b };
const result = source.pipe(
mergeMap((x: string) => of(x)),
window(closings),
mergeMap((x: Observable<string>) => of(x))
);
expectObservable(result, unsub).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(subs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should make outer emit error when closing throws', () => {
rxTestScheduler.run(({ hot, cold, expectObservable, expectSubscriptions }) => {
const source = hot('-1-2-^3-4-5-6-7-8-9-#');
const subs = ' ^---! ';
const closings = hot('---^---# ');
const closingSubs = ' ^---! ';
const expected = ' a---# ';
const a = cold(' -3-4# ');
const expectedValues = { a: a };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(subs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should complete the resulting Observable when window closings completes', () => {
rxTestScheduler.run(({ hot, cold, expectObservable, expectSubscriptions }) => {
const source = hot('-1-2-^3-4-5-6-7-8-9-|');
const subs = ' ^--------------!';
const closings = hot('---^---x---x---| ');
const closingSubs = ' ^-----------! ';
const expected = ' a---b---c------|';
const a = cold(' -3-4| ');
const b = cold(' -5-6| ');
const c = cold(' -7-8-9-|');
const expectedValues = { a: a, b: b, c: c };
const result = source.pipe(window(closings));
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(source.subscriptions).toBe(subs);
expectSubscriptions(closings.subscriptions).toBe(closingSubs);
});
});
it('should window when Promise resolves', (done) => {
const e1 = interval(3).pipe(take(5));
let pos = 0;
const result: number[][] = [[], []];
const expected = [
[0, 1],
[2, 3, 4],
];
e1.pipe(window(new Promise<void>((resolve) => setTimeout(() => resolve(), 8)))).subscribe({
next: (x) => {
x.subscribe({
next: (v) => result[pos].push(v),
complete: () => pos++,
});
},
error: () => done(new Error('should not be called')),
complete: () => {
expect(result).to.deep.equal(expected);
done();
},
});
});
it('should raise error when Promise rejects', (done) => {
const e1 = interval(1).pipe(take(5));
const error = new Error('err');
e1.pipe(window(Promise.reject(error))).subscribe({
error: (err) => {
expect(err).to.be.an('error');
done();
},
complete: () => {
done(new Error('should not be called'));
},
});
});
});