paperclip/server/src/__tests__/gemini-local-adapter.test.ts

import { describe, expect, it, vi } from "vitest";
import {
  isGeminiTurnLimitResult,
  isGeminiUnknownSessionError,
  parseGeminiJsonl,
} from "@paperclipai/adapter-gemini-local/server";
import { parseGeminiStdoutLine } from "@paperclipai/adapter-gemini-local/ui";
import { printGeminiStreamEvent } from "@paperclipai/adapter-gemini-local/cli";

describe("gemini_local parser", () => {
  it("extracts session, summary, usage, cost, and terminal error message from v0.38 stream-json output", () => {
    const stdout = [
      JSON.stringify({ type: "system", subtype: "init", session_id: "gemini-session-1", model: "gemini-2.5-pro" }),
      JSON.stringify({
        type: "message",
        role: "assistant",
        content: "hello",
      }),
      JSON.stringify({
        type: "result",
        status: "success",
        session_id: "gemini-session-1",
        stats: {
          input_tokens: 12,
          cached_input_tokens: 3,
          output_tokens: 7,
        },
        total_cost_usd: 0.00123,
      }),
      JSON.stringify({ type: "error", message: "model access denied" }),
    ].join("\n");

    const parsed = parseGeminiJsonl(stdout);
    expect(parsed.sessionId).toBe("gemini-session-1");
    expect(parsed.summary).toBe("hello");
    expect(parsed.usage).toEqual({
      inputTokens: 12,
      cachedInputTokens: 3,
      outputTokens: 7,
    });
    expect(parsed.costUsd).toBeCloseTo(0.00123, 6);
    expect(parsed.errorMessage).toBe("model access denied");
  });

  it("extracts structured questions", () => {
    const stdout = [
      JSON.stringify({
        type: "assistant",
        message: {
          content: [
            { type: "output_text", text: "I have a question." },
            {
              type: "question",
              prompt: "Which model?",
              choices: [
                { key: "pro", label: "Gemini Pro", description: "Better" },
                { key: "flash", label: "Gemini Flash" },
              ],
            },
          ],
        },
      }),
    ].join("\n");

    const parsed = parseGeminiJsonl(stdout);
    expect(parsed.summary).toBe("I have a question.");
    expect(parsed.question).toEqual({
      prompt: "Which model?",
      choices: [
        { key: "pro", label: "Gemini Pro", description: "Better" },
        { key: "flash", label: "Gemini Flash", description: undefined },
      ],
    });
  });
});

describe("gemini_local stale session detection", () => {
  it("treats missing session messages as an unknown session error", () => {
    expect(isGeminiUnknownSessionError("", "unknown session id abc")).toBe(true);
    expect(isGeminiUnknownSessionError("", "checkpoint latest not found")).toBe(true);
  });
});

describe("gemini_local turn-limit detection", () => {
  it("detects structured turn-limit signals and exit code 53", () => {
    expect(isGeminiTurnLimitResult({ status: "turn_limit" })).toBe(true);
    expect(isGeminiTurnLimitResult({ stopReason: "max_turns_exhausted" })).toBe(true);
    expect(isGeminiTurnLimitResult(null, 53)).toBe(true);
  });

  it("checks every structured stop field for turn-limit exhaustion", () => {
    expect(
      isGeminiTurnLimitResult({
        status: "success",
        stopReason: "turn_limit_exhausted",
      }),
    ).toBe(true);
  });

  it("does not detect turn-limit exhaustion from unstructured error text", () => {
    expect(isGeminiTurnLimitResult({ error: "max_turns reached" })).toBe(false);
  });
});

describe("gemini_local ui stdout parser", () => {
  it("parses v0.38 assistant message and result events", () => {
    const ts = "2026-03-08T00:00:00.000Z";

    expect(
      parseGeminiStdoutLine(
        JSON.stringify({
          type: "message",
          role: "assistant",
          content: "I checked the repo.",
        }),
        ts,
      ),
    ).toEqual([
      { kind: "assistant", ts, text: "I checked the repo." },
    ]);

    expect(
      parseGeminiStdoutLine(
        JSON.stringify({
          type: "result",
          status: "success",
          text: "Done",
          stats: {
            input_tokens: 10,
            output_tokens: 5,
            cached_input_tokens: 2,
          },
          total_cost_usd: 0.00042,
        }),
        ts,
      ),
    ).toEqual([
      {
        kind: "result",
        ts,
        text: "Done",
        inputTokens: 10,
        outputTokens: 5,
        cachedTokens: 2,
        costUsd: 0.00042,
        subtype: "success",
        isError: false,
        errors: [],
      },
    ]);
  });
});

function stripAnsi(value: string): string {
  return value.replace(/\x1b\[[0-9;]*m/g, "");
}

describe("gemini_local cli formatter", () => {
  it("prints init, v0.38 assistant, result, and error events", () => {
    const spy = vi.spyOn(console, "log").mockImplementation(() => {});
    let joined = "";

    try {
      printGeminiStreamEvent(
        JSON.stringify({ type: "system", subtype: "init", session_id: "gemini-session-1", model: "gemini-2.5-pro" }),
        false,
      );
      printGeminiStreamEvent(
        JSON.stringify({
          type: "message",
          role: "assistant",
          content: "hello",
        }),
        false,
      );
      printGeminiStreamEvent(
        JSON.stringify({
          type: "result",
          status: "success",
          stats: {
            input_tokens: 10,
            output_tokens: 5,
            cached_input_tokens: 2,
          },
          total_cost_usd: 0.00042,
        }),
        false,
      );
      printGeminiStreamEvent(
        JSON.stringify({ type: "error", message: "boom" }),
        false,
      );
      joined = spy.mock.calls.map((call) => stripAnsi(call.join(" "))).join("\n");
    } finally {
      spy.mockRestore();
    }

    expect(joined).toContain("Gemini init");
    expect(joined).toContain("assistant: hello");
    expect(joined).toContain("tokens: in=10 out=5 cached=2 cost=$0.000420");
    expect(joined).toContain("error: boom");
  });
});