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decolua--9router/tests/unit/headroom-responses-format.test.js
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JavaScript

// #1998 — Headroom compression treated a Codex (openai-responses) body.input
// array as OpenAI messages: it sent Responses items to /v1/compress and then
// assigned the returned OpenAI messages back to body.input, violating the
// Responses format contract. body.input must stay Responses-shaped.
import { describe, it, expect, vi, afterEach } from "vitest";
import { compressWithHeadroom } from "../../open-sse/rtk/headroom.js";
describe("compressWithHeadroom openai-responses format (#1998)", () => {
afterEach(() => {
vi.restoreAllMocks();
});
it("keeps body.input in Responses format after compressing an openai-responses request", async () => {
// Headroom always returns compressed OpenAI-style messages.
global.fetch = vi.fn(async () => ({
ok: true,
json: async () => ({
messages: [{ role: "user", content: "compressed text" }],
tokens_before: 100,
tokens_after: 90,
tokens_saved: 10,
}),
}));
const body = {
input: [
{
type: "message",
role: "user",
content: [{ type: "input_text", text: "a long original message ".repeat(20) }],
},
],
};
const data = await compressWithHeadroom(body, {
enabled: true,
url: "http://headroom.test",
model: "gpt-5",
format: "openai-responses",
});
expect(data).not.toBeNull();
// body.input must remain Responses items (type:"message" + content array),
// NOT the raw OpenAI messages ({ role, content: "<string>" }) the bug produced.
expect(Array.isArray(body.input)).toBe(true);
expect(body.input[0]).toMatchObject({ type: "message", role: "user" });
expect(Array.isArray(body.input[0].content)).toBe(true);
expect(typeof body.input[0].content).not.toBe("string");
});
it("skips Responses tool/reasoning history instead of collapsing it into a message (#2132)", async () => {
global.fetch = vi.fn(async () => ({
ok: true,
json: async () => ({
messages: [{ role: "user", content: "compressed tool history" }],
tokens_saved: 10,
}),
}));
const input = [
{
type: "message",
role: "user",
content: [{ type: "input_text", text: "investigate bug" }],
},
{
type: "function_call",
call_id: "call_apply_patch_123",
name: "apply_patch",
arguments: "*** Begin Patch\n*** End Patch",
},
{
type: "function_call_output",
call_id: "call_apply_patch_123",
output: "ok",
},
{
type: "reasoning",
summary: [{ type: "summary_text", text: "Need a plan" }],
},
];
const body = {
input: structuredClone(input),
tools: [
{
type: "custom",
name: "apply_patch",
format: { type: "grammar", syntax: "lark", definition: "start: /.+/" },
},
],
};
const diagnostics = {};
const data = await compressWithHeadroom(body, {
enabled: true,
url: "http://headroom.test",
model: "gpt-5",
format: "openai-responses",
diagnostics,
});
expect(data).toBeNull();
expect(global.fetch).not.toHaveBeenCalled();
expect(body.input).toEqual(input);
expect(diagnostics.reason).toBe("skipped: openai-responses tool/reasoning input is not safe to compress");
});
});