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std/signal/test.ts

Deno standard library
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.import { assertEquals, assertThrows } from "../testing/asserts.ts";import { delay } from "../async/delay.ts";import { onSignal, signal } from "./mod.ts";
Deno.test({ name: "signal() throws when called with empty signals", ignore: Deno.build.os === "windows", fn() { assertThrows( () => { // deno-lint-ignore no-explicit-any (signal as any)(); }, Error, "No signals are given. You need to specify at least one signal to create a signal stream.", ); },});
Deno.test({ name: "signal() iterates for multiple signals", ignore: Deno.build.os === "windows", 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); },});
Deno.test({ name: "onSignal() registers and disposes of event handler", ignore: Deno.build.os === "windows", async fn() { // This prevents the program from exiting. const t = setInterval(() => {}, 1000);
let calledCount = 0; const handle = onSignal(Deno.Signal.SIGINT, () => { calledCount++; });
await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGINT); await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGINT); await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGUSR2); await delay(20); handle.dispose(); // stop monitoring SIGINT await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGUSR1); await delay(20); Deno.kill(Deno.pid, Deno.Signal.SIGINT); await delay(20); assertEquals(calledCount, 2);
clearTimeout(t); },});