import { describe, expect, it } from "bun:test";
import { buildToolProgressDetail, extractRequestReason } from "../../src/routes/chatStreamEvents.js";

describe("tool reason display", () => {
  it("omits absent explanations and displays canonical or legacy reasons once", () => {
    const plain = buildToolProgressDetail("query", "running", { id: "n1" }, "");
    expect(plain).not.toContain("说明：");
    expect(plain).not.toContain("原因：");
    expect(plain).toContain("id=n1");
    for (const input of [{ reason: "  核验压力异常  " }, { request_reason: "核验压力异常" }]) {
      const detail = buildToolProgressDetail("query", "running", input, extractRequestReason(input));
      expect(detail).toContain("；说明：核验压力异常");
      expect(detail.match(/核验压力异常/g)).toHaveLength(1);
    }
    expect(extractRequestReason({ reason: "当前说明", purpose: "旧说明" })).toBe("当前说明");
  });
});