import { getMSTeamsRuntime } from "./runtime.js";

import { buildUserAgent, ensureUserAgentHeader, resetUserAgentCache } from "./user-agent.js";

function readFirstFetchInit(mockFetch: { mock: { calls: unknown[][] } }): {

headers: Record<string, string>;

} {

const [call] = mockFetch.mock.calls;

if (!call) {

throw new Error("Expected Graph fetch call");

}

const [, init] = call;

if (

!init ||

typeof init !== "object" ||

!("headers" in init) ||

typeof init.headers !== "object" ||

init.headers === null

) {

throw new Error("Expected Graph fetch init headers");

}

return init as { headers: Record<string, string> };

}

describe("buildUserAgent", () => {

beforeEach(() => {

resetUserAgentCache();

await fetchGraphJson({ token: "test-token", path: "/groups" });

expect(mockFetch).toHaveBeenCalledOnce();

const [, init] = mockFetch.mock.calls[0];

const init = readFirstFetchInit(mockFetch);

expect(init.headers["User-Agent"]).toMatch(/^teams\.ts\[apps\]\/.+ OpenClaw\/2026\.3\.19$/);

expect(init.headers).toHaveProperty("Authorization", "Bearer test-token");

});

headers: { "User-Agent": "custom-agent/1.0" },

});

const [, init] = mockFetch.mock.calls[0];

const init = readFirstFetchInit(mockFetch);

expect(init.headers["User-Agent"]).toBe("custom-agent/1.0");

});