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const { test } = Deno;
import { assertEquals, assertThrows } from "../testing/asserts.ts";
import { delay } from "../util/async.ts";
import { signal, onSignal } 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);
},
});
test({
name: "onSignal() registers and disposes of event handler",
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);
// 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);
},
});
}
|
