import { describe, expect, it } from "vitest"; import { runProcess } from "./processRunner"; describe("runProcess", () => {  it("fails when output exceeds max buffer in default mode", async () => {    await expect(      runProcess("node", ["-e", "process.stdout.write('x'.repeat(2048))"], { maxBufferBytes: 128 }),    ).rejects.toThrow("exceeded stdout buffer limit");  });   it("truncates output when outputMode is truncate", async () => {    const result = await runProcess("node", ["-e", "process.stdout.write('x'.repeat(2048))"], {      maxBufferBytes: 128,      outputMode: "truncate",    });     expect(result.code).toBe(0);    expect(result.stdout.length).toBeLessThanOrEqual(128);    expect(result.stdoutTruncated).toBe(true);    expect(result.stderrTruncated).toBe(false);  });});