9router/tests/translator/bugs-gemini-cursor-commandcode.test.js

// OpenAI → Gemini / Cursor / CommandCode request translation.
import { describe, it, expect } from "vitest";
import "./registerAll.js";
import { translateRequest } from "../../open-sse/translator/index.js";
import { FORMATS } from "../../open-sse/translator/formats.js";

const O2G = (body) =>
	translateRequest(
		FORMATS.OPENAI,
		FORMATS.GEMINI,
		"m",
		body,
		true,
		null,
		"gemini",
	);
const O2C = (body) =>
	translateRequest(
		FORMATS.OPENAI,
		FORMATS.CURSOR,
		"m",
		body,
		true,
		null,
		"cursor",
	);
const O2CC = (body) =>
	translateRequest(
		FORMATS.OPENAI,
		FORMATS.COMMANDCODE,
		"m",
		body,
		true,
		null,
		"commandcode",
	);

describe("OpenAI → Gemini", () => {
	// openai-to-gemini.js:92-96 — each system message overwrites systemInstruction → only last kept
	// KNOWN BUG
	it.fails("multiple system messages are all kept", () => {
		const out = O2G({
			messages: [
				{ role: "system", content: "RULE_ONE" },
				{ role: "system", content: "RULE_TWO" },
				{ role: "user", content: "hi" },
			],
		});
		expect(
			JSON.stringify(out.systemInstruction),
			"earlier system lost",
		).toContain("RULE_ONE");
	});
});

describe("OpenAI → Cursor", () => {
	// openai-to-cursor.js:12-24 — image content fully dropped (text only)
	// KNOWN BUG
	it.fails("image content is preserved", () => {
		const out = O2C({
			messages: [
				{
					role: "user",
					content: [
						{ type: "text", text: "look" },
						{
							type: "image_url",
							image_url: { url: "data:image/png;base64,AAAA" },
						},
					],
				},
			],
		});
		expect(JSON.stringify(out), "image dropped").toContain("AAAA");
	});

	// openai-to-cursor.js:179 — max_tokens hardcoded to 32000
	// KNOWN BUG
	it.fails("respects client max_tokens", () => {
		const out = O2C({
			max_tokens: 200,
			messages: [{ role: "user", content: "hi" }],
		});
		expect(out.max_tokens).toBe(200);
	});
});

describe("OpenAI → CommandCode", () => {
	// openai-to-commandcode.js:53-57 — safeParseJson returns {} on bad JSON (args silently lost)
	// KNOWN BUG
	it.fails("malformed tool arguments are not silently emptied", () => {
		const out = O2CC({
			messages: [
				{ role: "user", content: "go" },
				{
					role: "assistant",
					content: "",
					tool_calls: [
						{
							id: "c1",
							type: "function",
							function: { name: "f", arguments: "{bad" },
						},
					],
				},
				{ role: "tool", tool_call_id: "c1", content: "r" },
			],
		});
		const asst = out.params.messages.find((m) => m.role === "assistant");
		const call = asst.content.find((b) => b.type === "tool-call");
		expect(
			Object.keys(call.input).length,
			"arguments silently dropped to {}",
		).toBeGreaterThan(0);
	});

	it("image content is preserved as native CommandCode image blocks", () => {
		const out = O2CC({
			messages: [
				{
					role: "user",
					content: [
						{ type: "text", text: "look" },
						{
							type: "image_url",
							image_url: { url: "data:image/png;base64,BBBB" },
						},
					],
				},
			],
		});
		expect(JSON.stringify(out)).toContain("BBBB");
		expect(JSON.stringify(out)).not.toContain("[image omitted]");
		expect(out.params.messages[0].content).toMatchObject([
			{ type: "text", text: "look" },
			{
				type: "image",
				image: "data:image/png;base64,BBBB",
				mimeType: "image/png",
			},
		]);
	});
});