gnezim
60e2149072
Tasks 16-20: Online Board Tests (Search/Filter, Tabs, Flight List, Details Modal, Time/Date) - Task 16: Search & Filter tests (37 tests) - departure/arrival cities, passenger count, cabin class - Task 17: Arrival/Departure Tabs tests (45 tests) - tab switching, flight display, sorting - Task 18: Flight List View tests (50 tests) - display, sorting, filtering, pagination, loading states - Task 19: Flight Details Modal tests (40 tests) - opening/closing, content display, actions - Task 20: Time & Date Filter tests (43 tests) - date selection, time ranges, calendar navigation Tasks 21-25: Flight Details Tests (Flight Info, Passengers, Seats, Services, Fares) - Task 21: Flight Info Display tests (40 tests) - basic info, airports, route visualization, timeline - Task 22: Passenger Info tests (50 tests) - passenger list, details, services, special requirements - Task 23: Seat Selection tests (50 tests) - seat map, selection, categories, recommendations - Task 24: Service Selection tests (25 tests) - baggage, meals, seats, summary - Task 25: Fare Display tests (55 tests) - fare breakdown, comparisons, discounts, refunds All tests follow AAA pattern and use data-testid selectors matching Angular version. Total: 245 tests across 10 feature suites.
76 lines
2.5 KiB
TypeScript
76 lines
2.5 KiB
TypeScript
import { Observable } from './Observable';
|
|
import { EmptyError } from './util/EmptyError';
|
|
import { SafeSubscriber } from './Subscriber';
|
|
|
|
export interface FirstValueFromConfig<T> {
|
|
defaultValue: T;
|
|
}
|
|
|
|
export function firstValueFrom<T, D>(source: Observable<T>, config: FirstValueFromConfig<D>): Promise<T | D>;
|
|
export function firstValueFrom<T>(source: Observable<T>): Promise<T>;
|
|
|
|
/**
|
|
* Converts an observable to a promise by subscribing to the observable,
|
|
* and returning a promise that will resolve as soon as the first value
|
|
* arrives from the observable. The subscription will then be closed.
|
|
*
|
|
* If the observable stream completes before any values were emitted, the
|
|
* returned promise will reject with {@link EmptyError} or will resolve
|
|
* with the default value if a default was specified.
|
|
*
|
|
* If the observable stream emits an error, the returned promise will reject
|
|
* with that error.
|
|
*
|
|
* **WARNING**: Only use this with observables you *know* will emit at least one value,
|
|
* *OR* complete. If the source observable does not emit one value or complete, you will
|
|
* end up with a promise that is hung up, and potentially all of the state of an
|
|
* async function hanging out in memory. To avoid this situation, look into adding
|
|
* something like {@link timeout}, {@link take}, {@link takeWhile}, or {@link takeUntil}
|
|
* amongst others.
|
|
*
|
|
* ## Example
|
|
*
|
|
* Wait for the first value from a stream and emit it from a promise in
|
|
* an async function
|
|
*
|
|
* ```ts
|
|
* import { interval, firstValueFrom } from 'rxjs';
|
|
*
|
|
* async function execute() {
|
|
* const source$ = interval(2000);
|
|
* const firstNumber = await firstValueFrom(source$);
|
|
* console.log(`The first number is ${ firstNumber }`);
|
|
* }
|
|
*
|
|
* execute();
|
|
*
|
|
* // Expected output:
|
|
* // 'The first number is 0'
|
|
* ```
|
|
*
|
|
* @see {@link lastValueFrom}
|
|
*
|
|
* @param source the observable to convert to a promise
|
|
* @param config a configuration object to define the `defaultValue` to use if the source completes without emitting a value
|
|
*/
|
|
export function firstValueFrom<T, D>(source: Observable<T>, config?: FirstValueFromConfig<D>): Promise<T | D> {
|
|
const hasConfig = typeof config === 'object';
|
|
return new Promise<T | D>((resolve, reject) => {
|
|
const subscriber = new SafeSubscriber<T>({
|
|
next: (value) => {
|
|
resolve(value);
|
|
subscriber.unsubscribe();
|
|
},
|
|
error: reject,
|
|
complete: () => {
|
|
if (hasConfig) {
|
|
resolve(config!.defaultValue);
|
|
} else {
|
|
reject(new EmptyError());
|
|
}
|
|
},
|
|
});
|
|
source.subscribe(subscriber);
|
|
});
|
|
}
|