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// Copyright 2018-2021 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";import { isWindows } from "../_util/os.ts";
Deno.test({  name: "signal() throws when called with empty signals",  ignore: isWindows,  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: isWindows,  fn: async () => {    // This prevents the program from exiting.    const t = setInterval(() => {}, 1000);
    let c = 0;    const sig = signal(      "SIGUSR1",      "SIGUSR2",      "SIGINT",    );
    setTimeout(async () => {      await delay(20);      Deno.kill(Deno.pid, "SIGINT");      await delay(20);      Deno.kill(Deno.pid, "SIGUSR2");      await delay(20);      Deno.kill(Deno.pid, "SIGUSR1");      await delay(20);      Deno.kill(Deno.pid, "SIGUSR2");      await delay(20);      Deno.kill(Deno.pid, "SIGUSR1");      await delay(20);      Deno.kill(Deno.pid, "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: isWindows,  async fn() {    // This prevents the program from exiting.    const t = setInterval(() => {}, 1000);
    let calledCount = 0;    const handle = onSignal("SIGINT", () => {      calledCount++;    });
    await delay(20);    Deno.kill(Deno.pid, "SIGINT");    await delay(20);    Deno.kill(Deno.pid, "SIGINT");    await delay(20);    Deno.kill(Deno.pid, "SIGUSR2");    await delay(20);    handle.dispose(); // stop monitoring SIGINT    await delay(20);    Deno.kill(Deno.pid, "SIGUSR1");    await delay(20);    Deno.kill(Deno.pid, "SIGINT");    await delay(20);    assertEquals(calledCount, 2);
    clearTimeout(t);  },});