|
|
import { TraceSource, DebugLevel } from "@implab/core/log/TraceSource";
|
|
|
import * as tape from "tape";
|
|
|
import { TapeWriter, delay } from "./TestTraits";
|
|
|
import { Observable } from "@implab/core/Observable";
|
|
|
import { IObservable } from "@implab/core/interfaces";
|
|
|
|
|
|
const trace = TraceSource.get("ObservableTests");
|
|
|
|
|
|
tape("events sequence example", async t => {
|
|
|
|
|
|
let events: IObservable<number>;
|
|
|
|
|
|
const done = new Promise<void>(resolve => {
|
|
|
events = new Observable<number>(async (notify, fail, finish) => {
|
|
|
for (let i = 0; i < 10; i++) {
|
|
|
await delay(0);
|
|
|
notify(i);
|
|
|
}
|
|
|
finish();
|
|
|
resolve();
|
|
|
});
|
|
|
});
|
|
|
|
|
|
let count = 0;
|
|
|
let complete = false;
|
|
|
events.on(x => count = count + x, null, () => complete = true);
|
|
|
|
|
|
const first = await events.next();
|
|
|
|
|
|
t.equals(first, 0, "the first event");
|
|
|
t.false(complete, "the sequence is not complete");
|
|
|
|
|
|
await done;
|
|
|
|
|
|
t.equals(count, 45, "the summ of the evetns");
|
|
|
t.true(complete, "the sequence is complete");
|
|
|
|
|
|
t.end();
|
|
|
});
|
|
|
|
|
|
tape("event sequence termination", async t => {
|
|
|
let events: IObservable<number>;
|
|
|
|
|
|
const done = new Promise<void>(resolve => {
|
|
|
events = new Observable<number>(async (notify, fail, complete) => {
|
|
|
await delay(0);
|
|
|
notify(1);
|
|
|
complete();
|
|
|
notify(2);
|
|
|
complete();
|
|
|
fail("Sequence terminated");
|
|
|
resolve();
|
|
|
});
|
|
|
});
|
|
|
|
|
|
let count = 0;
|
|
|
events.on(() => {}, e => count++, () => count++);
|
|
|
|
|
|
const first = await events.next();
|
|
|
t.equals(first, 1, "the first message");
|
|
|
try {
|
|
|
await events.next();
|
|
|
t.fail("shoud throw an exception");
|
|
|
} catch (e) {
|
|
|
t.pass("the sequence is terminated");
|
|
|
}
|
|
|
|
|
|
await done;
|
|
|
|
|
|
t.equals(count, 1, "the sequence must be terminated once");
|
|
|
|
|
|
t.end();
|
|
|
});
|
|
|
|
