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chore: update pairwise tests to run mode #6511

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Jul 8, 2021
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chore: update pairwise tests to run mode #6511

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183 changes: 94 additions & 89 deletions spec/operators/pairwise-spec.ts
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Original file line number Diff line number Diff line change
@@ -1,133 +1,139 @@
import { hot, cold, expectObservable, expectSubscriptions } from '../helpers/marble-testing';
/** @prettier */
import { TestScheduler } from 'rxjs/testing';
import { pairwise, take } from 'rxjs/operators';
import { Subject, Observable } from 'rxjs';
import { expect } from 'chai';
import { observableMatcher } from '../helpers/observableMatcher';

/** @test {pairwise} */
describe('pairwise operator', () => {
it('should group consecutive emissions as arrays of two', () => {
const e1 = hot('--a--b-c----d--e---|');
const expected = '-----u-v----w--x---|';

const values = {
u: ['a', 'b'],
v: ['b', 'c'],
w: ['c', 'd'],
x: ['d', 'e']
};
let testScheduler: TestScheduler;

const source = (<any>e1).pipe(pairwise());
beforeEach(() => {
testScheduler = new TestScheduler(observableMatcher);
});

expectObservable(source).toBe(expected, values);
it('should group consecutive emissions as arrays of two', () => {
testScheduler.run(({ hot, expectObservable, expectSubscriptions }) => {
const e1 = hot(' --a--b-c----d--e---|');
const e1subs = ' ^------------------!';
const expected = '-----u-v----w--x---|';

const values = {
u: ['a', 'b'],
v: ['b', 'c'],
w: ['c', 'd'],
x: ['d', 'e'],
};

expectObservable(e1.pipe(pairwise())).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should pairwise things', () => {
const e1 = hot('--a--^--b--c--d--e--f--g--|');
const e1subs = '^ !';
const expected = '------v--w--x--y--z--|';

const values = {
v: ['b', 'c'],
w: ['c', 'd'],
x: ['d', 'e'],
y: ['e', 'f'],
z: ['f', 'g']
};

const source = (<any>e1).pipe(pairwise());

expectObservable(source).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
testScheduler.run(({ hot, expectObservable, expectSubscriptions }) => {
const e1 = hot('--a--^--b--c--d--e--f--g--|');
const e1subs = ' ^--------------------!';
const expected = ' ------v--w--x--y--z--|';

const values = {
v: ['b', 'c'],
w: ['c', 'd'],
x: ['d', 'e'],
y: ['e', 'f'],
z: ['f', 'g'],
};

expectObservable(e1.pipe(pairwise())).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should not emit on single-element streams', () => {
const e1 = hot('-----^--b----|');
const e1subs = '^ !';
const expected = '--------|';
testScheduler.run(({ hot, expectObservable, expectSubscriptions }) => {
const e1 = hot('--a--^--b----|');
const e1subs = ' ^-------!';
const expected = ' --------|';

const values = {
};

const source = (<any>e1).pipe(pairwise());

expectObservable(source).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectObservable(e1.pipe(pairwise())).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should handle mid-stream throw', () => {
const e1 = hot('--a--^--b--c--d--e--#');
const e1subs = '^ !';
const expected = '------v--w--x--#';

const values = {
v: ['b', 'c'],
w: ['c', 'd'],
x: ['d', 'e']
};

const source = (<any>e1).pipe(pairwise());

expectObservable(source).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
testScheduler.run(({ hot, expectObservable, expectSubscriptions }) => {
const e1 = hot('--a--^--b--c--d--e--#');
const e1subs = ' ^--------------!';
const expected = ' ------v--w--x--#';

const values = {
v: ['b', 'c'],
w: ['c', 'd'],
x: ['d', 'e'],
};

expectObservable(e1.pipe(pairwise())).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should handle empty', () => {
const e1 = cold('|');
const e1subs = '(^!)';
const expected = '|';

const source = (<any>e1).pipe(pairwise());
testScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const e1 = cold(' | ');
const e1subs = ' (^!)';
const expected = '| ';

expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectObservable(e1.pipe(pairwise())).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should handle never', () => {
const e1 = cold('-');
const e1subs = '^';
const expected = '-';

const source = (<any>e1).pipe(pairwise());
testScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const e1 = cold(' -');
const e1subs = ' ^';
const expected = '-';

expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectObservable(e1.pipe(pairwise())).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should handle throw', () => {
const e1 = cold('#');
const e1subs = '(^!)';
const expected = '#';

const source = (<any>e1).pipe(pairwise());
testScheduler.run(({ cold, expectObservable, expectSubscriptions }) => {
const e1 = cold(' # ');
const e1subs = ' (^!)';
const expected = '# ';

expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectObservable(e1.pipe(pairwise())).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});

it('should be recursively re-enterable', () => {
const results = new Array<[string, string]>();

const subject = new Subject<string>();

subject
.pipe(
pairwise(),
take(3)
)
.subscribe(pair => {
results.push(pair);
subject.next('c');
});
subject.pipe(pairwise(), take(3)).subscribe((pair) => {
results.push(pair);
subject.next('c');
});

subject.next('a');
subject.next('b');

expect(results).to.deep.equal([['a', 'b'], ['b', 'c'], ['c', 'c']]);
expect(results).to.deep.equal([
['a', 'b'],
['b', 'c'],
['c', 'c'],
]);
});

it('should stop listening to a synchronous observable when unsubscribed', () => {
const sideEffects: number[] = [];
const synchronousObservable = new Observable<number>(subscriber => {
const synchronousObservable = new Observable<number>((subscriber) => {
// This will check to see if the subscriber was closed on each loop
// when the unsubscribe hits (from the `take`), it should be closed
for (let i = 0; !subscriber.closed && i < 10; i++) {
Expand All @@ -136,10 +142,9 @@ describe('pairwise operator', () => {
}
});

synchronousObservable.pipe(
pairwise(),
take(2),
).subscribe(() => { /* noop */ });
synchronousObservable.pipe(pairwise(), take(2)).subscribe(() => {
/* noop */
});

expect(sideEffects).to.deep.equal([0, 1, 2]);
});
Expand Down