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std/signal/test.ts

Deno standard library
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const { test } = Deno;import { assertEquals, assertThrows } from "../testing/asserts.ts";import { delay } from "../util/async.ts";import { signal } from "./mod.ts";
if (Deno.build.os !== "win") { test("signal() throws when called with empty signals", (): void => { assertThrows( () => { // @ts-ignore signal(); }, Error, "No signals are given. You need to specify at least one signal to create a signal stream." ); });
test({ name: "signal() iterates for multiple signals", fn: async (): Promise<void> => { // This prevents the program from exiting. const t = setInterval(() => {}, 1000);
let c = 0; const sig = signal( Deno.Signal.SIGUSR1, Deno.Signal.SIGUSR2, Deno.Signal.SIGINT );
setTimeout(async () => { await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGINT); await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGUSR2); await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGUSR1); await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGUSR2); await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGUSR1); await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGINT); await delay(20); sig.dispose(); });
for await (const _ of sig) { c += 1; }
assertEquals(c, 6);
clearTimeout(t); // Clear timeout clears interval, but interval promise is not // yet resolved, delay to next turn of event loop otherwise, // we'll be leaking resources. await delay(10); }, });}