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chore: update isEmpty tests to run mode #5953

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merged 1 commit into from Jan 16, 2021
Merged

chore: update isEmpty tests to run mode #5953

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120 changes: 71 additions & 49 deletions spec/operators/isEmpty-spec.ts
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@@ -1,77 +1,99 @@
/** @prettier */
import { isEmpty, mergeMap } from 'rxjs/operators';
import { hot, cold, expectObservable, expectSubscriptions } from '../helpers/marble-testing';
import { TestScheduler } from 'rxjs/testing';
import { of } from 'rxjs';
import { observableMatcher } from '../helpers/observableMatcher';

/** @test {isEmpty} */
describe('isEmpty operator', () => {
describe('isEmpty', () => {
let testScheduler: TestScheduler;

beforeEach(() => {
testScheduler = new TestScheduler(observableMatcher);
});

it('should return true if source is empty', () => {
const source = hot('-----|');
const subs = '^ !';
const expected = '-----(T|)';
testScheduler.run(({ hot, expectObservable, expectSubscriptions }) => {
const e1 = hot(' -----| ');
const e1subs = ' ^----! ';
const expected = '-----(T|)';

expectObservable((<any>source).pipe(isEmpty())).toBe(expected, { T: true });
expectSubscriptions(source.subscriptions).toBe(subs);
expectObservable(e1.pipe(isEmpty())).toBe(expected, { T: true });
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should return false if source emits element', () => {
const source = hot('--a--^--b--|');
const subs = '^ !';
const expected = '---(F|)';
testScheduler.run(({ hot, expectObservable, expectSubscriptions }) => {
const e1 = hot('--a--^--b--|');
const e1subs = ' ^--! ';
const expected = ' ---(F|)';

expectObservable((<any>source).pipe(isEmpty())).toBe(expected, { F: false });
expectSubscriptions(source.subscriptions).toBe(subs);
expectObservable(e1.pipe(isEmpty())).toBe(expected, { F: false });
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should raise error if source raise error', () => {
const source = hot('--#');
const subs = '^ !';
const expected = '--#';
it('should raise error if source raises error', () => {
testScheduler.run(({ hot, expectObservable, expectSubscriptions }) => {
const e1 = hot(' --#');
const e1subs = ' ^-!';
const expected = '--#';

expectObservable((<any>source).pipe(isEmpty())).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
expectObservable(e1.pipe(isEmpty())).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should not completes if source never emits', () => {
const source = cold('-');
const subs = '^';
const expected = '-';
it('should not complete if source never emits', () => {
testScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const e1 = cold(' -');
const e1subs = ' ^';
const expected = '-';

expectObservable((<any>source).pipe(isEmpty())).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
expectObservable(e1.pipe(isEmpty())).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should return true if source is Observable.empty()', () => {
const source = cold('|');
const subs = '(^!)';
const expected = '(T|)';
it('should return true if source is empty', () => {
testScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const e1 = cold(' | ');
const e1subs = ' (^!)';
const expected = '(T|)';

expectObservable((<any>source).pipe(isEmpty())).toBe(expected, { T: true });
expectSubscriptions(source.subscriptions).toBe(subs);
expectObservable(e1.pipe(isEmpty())).toBe(expected, { T: true });
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should allow unsubscribing explicitly and early', () => {
const source = cold('-----------a--b--|');
const unsub = ' ! ';
const subs = '^ ! ';
const expected = '------- ';
testScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const e1 = cold(' -----------a--b--|');
const e1subs = ' ^-----! ';
const expected = '------- ';
const unsub = ' ------! ';

expectObservable((<any>source).pipe(isEmpty()), unsub).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
expectObservable(e1.pipe(isEmpty()), unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should not break unsubscription chains when result is unsubscribed explicitly', () => {
const source = cold('-----------a--b--|');
const subs = '^ ! ';
const expected = '------- ';
const unsub = ' ! ';

const result = (<any>source).pipe(
mergeMap((x: string) => of(x)),
isEmpty(),
mergeMap((x: string) => of(x))
);

expectObservable(result, unsub).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
testScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const e1 = cold(' -----------a--b--|');
const e1subs = ' ^-----! ';
const expected = '------- ';
const unsub = ' ------! ';

const result = e1.pipe(
mergeMap((x) => of(x)),
isEmpty(),
mergeMap((x) => of(x))
);

expectObservable(result, unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});
});