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import { afterEach, beforeEach, expect, mock, test } from "bun:test";
const requests: unknown[] = [];
const activeDisposers: Array<() => void> = [];
const requestWaiters: Array<() => void> = [];
let importCounter = 0;
mock.module("node:net", () => ({
default: {
createConnection(_path: string, onConnect: () => void) {
const handlers = new Map<string, () => void>();
const client = {
write(input: string) {
requests.push(JSON.parse(input.trim()));
requestWaiters.shift()?.();
queueMicrotask(() => client.emit("data"));
},
setTimeout() {},
on(event: string, handler: () => void) {
handlers.set(event, handler);
},
destroy() {},
emit(event: string) {
handlers.get(event)?.();
},
};
queueMicrotask(onConnect);
return client;
},
},
}));
beforeEach(() => {
requests.length = 0;
requestWaiters.length = 0;
process.env.HERDR_ENV = "1";
process.env.HERDR_SOCKET_PATH = "test.sock";
process.env.HERDR_PANE_ID = "test:p1";
});
afterEach(() => {
for (const dispose of activeDisposers.splice(0)) {
dispose();
}
});
async function loadPlugin() {
importCounter += 1;
const module = await import(`./herdr-tui-session.js?test=${importCounter}`);
return module.default;
}
function fakeApi() {
const sessions = new Map<string, { id: string; parentID?: string }>();
let current: { name: string; params?: { sessionID: string } } = { name: "home" };
let dispose: (() => void) | undefined;
activeDisposers.push(() => dispose?.());
return {
api: {
route: {
get current() {
return current;
},
},
state: {
session: {
get(sessionID: string) {
return sessions.get(sessionID);
},
},
},
lifecycle: {
onDispose(handler: () => void) {
dispose = handler;
return () => {};
},
},
},
addSession(session: { id: string; parentID?: string }) {
sessions.set(session.id, session);
},
select(sessionID: string) {
current = { name: "session", params: { sessionID } };
},
dispose() {
dispose?.();
},
};
}
function waitForNextRequest(): Promise<void> {
return new Promise((resolve) => requestWaiters.push(resolve));
}
test("reports a root session when only the local route changes", async () => {
const plugin = await loadPlugin();
const tui = fakeApi();
tui.addSession({ id: "session-a" });
await plugin.tui(tui.api);
const dispatched = waitForNextRequest();
tui.select("session-a");
await dispatched;
expect(requests).toHaveLength(1);
expect(requestParam(requests[0], "agent_session_id")).toBe("session-a");
expect(requestParam(requests[0], "session_start_source")).toBe("select");
expect(requestParam(requests[0], "seq")).toBeUndefined();
});
test("retries an initial selection while Herdr detects the process", async () => {
const plugin = await loadPlugin();
const tui = fakeApi();
tui.addSession({ id: "session-a" });
tui.select("session-a");
await plugin.tui(tui.api);
await new Promise((resolve) => setTimeout(resolve, 125));
expect(requests.map((request) => requestParam(request, "agent_session_id"))).toEqual([
"session-a",
"session-a",
]);
});
test("does not report root sessions not selected by this TUI", async () => {
const plugin = await loadPlugin();
const tui = fakeApi();
tui.addSession({ id: "session-a" });
tui.addSession({ id: "session-b" });
tui.select("session-a");
await plugin.tui(tui.api);
await new Promise((resolve) => setTimeout(resolve, 125));
expect(requests.length).toBeGreaterThan(0);
expect(requests.every((request) => requestParam(request, "agent_session_id") === "session-a")).toBe(
true,
);
});
test("does not replace the root session with a selected child session", async () => {
const plugin = await loadPlugin();
const tui = fakeApi();
tui.addSession({ id: "root-session" });
tui.addSession({ id: "child-session", parentID: "root-session" });
tui.select("root-session");
await plugin.tui(tui.api);
expect(requests).toHaveLength(1);
tui.select("child-session");
await new Promise((resolve) => setTimeout(resolve, 125));
expect(requests).toHaveLength(1);
expect(requestParam(requests[0], "agent_session_id")).toBe("root-session");
});
test("stops route polling when the TUI plugin is disposed", async () => {
const plugin = await loadPlugin();
const tui = fakeApi();
tui.addSession({ id: "session-a" });
await plugin.tui(tui.api);
tui.dispose();
tui.select("session-a");
await new Promise((resolve) => setTimeout(resolve, 125));
expect(requests).toHaveLength(0);
});
function requestParam(request: unknown, name: string): unknown {
if (!isRecord(request) || !isRecord(request.params)) {
return undefined;
}
return request.params[name];
}
function isRecord(value: unknown): value is Record<string, unknown> {
return typeof value === "object" && value !== null;
}
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