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denoland-deno/std/signal/test.ts

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const { test } = Deno;
import { assertEquals, assertThrows } from "../testing/asserts.ts";
import { delay } from "../async/delay.ts";
import { signal, onSignal } from "./mod.ts";
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test({
name: "signal() throws when called with empty signals",
ignore: Deno.build.os === "windows",
fn() {
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assertThrows(
() => {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(signal as any)();
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},
Error,
"No signals are given. You need to specify at least one signal to create a signal stream."
);
},
});
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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);
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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);
},
});
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);
},
});