import { describe, expect, it } from "vitest"; import { ProcessManager } from "./processManager"; describe("ProcessManager", () => {  it("can be instantiated", () => {    const pm = new ProcessManager();    expect(pm).toBeInstanceOf(ProcessManager);  });   it("spawns a process and receives output", async () => {    const pm = new ProcessManager();    const chunks: string[] = [];     const done = new Promise<void>((resolve) => {      pm.on("output", (chunk) => {        chunks.push(chunk.data);      });      pm.on("exit", () => {        resolve();      });    });     const sessionId = pm.spawn({ command: "echo", args: ["hello"] });    expect(typeof sessionId).toBe("string");    expect(sessionId.length).toBeGreaterThan(0);     await done;     expect(chunks.join("").trim()).toBe("hello");  });   it("can kill a spawned process", async () => {    const pm = new ProcessManager();     const exited = new Promise<number | null>((resolve) => {      pm.on("exit", (exit) => {        resolve(exit.code);      });    });     const sessionId = pm.spawn({ command: "sleep", args: ["10"] });    pm.kill(sessionId);     const code = await exited;    expect(code).not.toBe(0);  });});