bun.sh/test/js/bun/spawn/spawn-kill-signal.test.ts

import { describe, expect, test } from "bun:test";
import { shellExe } from "harness";
import { constants } from "os";

const inputs = {
  SIGTERM: [["SIGTERM"], [undefined], [""], [null], [], [constants.signals.SIGTERM], [NaN]],
  SIGKILL: [["SIGKILL"], [constants.signals.SIGKILL]],
} as const;
const fails = [["SIGGOD"], [{}], [() => {}], [Infinity], [-Infinity], [Symbol("what")]] as const;
describe("subprocess.kill", () => {
  for (const key in inputs) {
    describe(key, () => {
      for (let input of inputs[key as keyof typeof inputs]) {
        test(Bun.inspect(input).replaceAll("\n", "\\n"), async () => {
          const proc = Bun.spawn({
            cmd: [shellExe(), "-c", "sleep 1000"],
            stdio: ["inherit", "inherit", "inherit"],
          });

          const { promise, resolve, reject } = Promise.withResolvers();
          proc.exited.then(resolve, reject);
          proc.kill(...input);

          await promise;
          expect(proc.exitCode).toBe(null);
          expect(proc.signalCode).toBe(key as any);
        });
      }
    });
  }

  describe("input validation", () => {
    for (let input of fails) {
      test(Bun.inspect(input).replaceAll("\n", "\\n"), async () => {
        const proc = Bun.spawn({
          cmd: [shellExe(), "-c", "sleep 1000"],
          stdio: ["inherit", "inherit", "inherit"],
        });

        expect(() => proc.kill(...(input as any))).toThrow();

        const { promise, resolve, reject } = Promise.withResolvers();
        proc.exited.then(resolve, reject);
        proc.kill();

        await promise;

        expect(proc.exitCode).toBe(null);
        expect(proc.signalCode).toBe("SIGTERM");
      });
    }
  });
});