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import { beforeEach, expect, mock, test } from "bun:test";
const requests: unknown[] = [];
const clients: FakeClient[] = [];
const requestWaiters: Array<() => void> = [];
let autoAcknowledge = true;
let importCounter = 0;
type FakeClient = {
emit: (event: string) => void;
};
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()?.();
if (autoAcknowledge) {
queueMicrotask(() => client.emit("data"));
}
},
setTimeout() {},
on(event: string, handler: () => void) {
handlers.set(event, handler);
},
destroy() {},
emit(event: string) {
handlers.get(event)?.();
},
};
clients.push(client);
queueMicrotask(onConnect);
return client;
},
},
}));
beforeEach(() => {
requests.length = 0;
clients.length = 0;
requestWaiters.length = 0;
autoAcknowledge = true;
process.env.HERDR_ENV = "1";
process.env.HERDR_SOCKET_PATH = "test.sock";
process.env.HERDR_PANE_ID = "test:p1";
});
async function loadPlugin() {
importCounter += 1;
const { HerdrAgentStatePlugin } = await import(`./herdr-agent-state.js?test=${importCounter}`);
return HerdrAgentStatePlugin();
}
function waitForNextRequest(): Promise<void> {
return new Promise((resolve) => requestWaiters.push(resolve));
}
test("serializes lifecycle reports", async () => {
autoAcknowledge = false;
const plugin = await loadPlugin();
const firstDispatched = waitForNextRequest();
const working = plugin.event({
event: {
type: "session.status",
properties: { sessionID: "root-session", status: { type: "busy" } },
},
});
await firstDispatched;
const secondDispatched = waitForNextRequest();
const idle = plugin.event({
event: {
type: "session.status",
properties: { sessionID: "root-session", status: { type: "idle" } },
},
});
expect(clients).toHaveLength(1);
clients[0]?.emit("data");
await secondDispatched;
expect(clients).toHaveLength(2);
clients[1]?.emit("data");
await Promise.all([working, idle]);
expect(requests.map(requestState)).toEqual(["working", "idle"]);
const sequences = requests.map(requestSeq);
expect(sequences[0]).toEqual(expect.any(Number));
expect(sequences[1]).toBe((sequences[0] as number) + 1);
});
test("suppresses redundant same-session updates", async () => {
const plugin = await loadPlugin();
await plugin.event({
event: {
type: "session.status",
properties: { sessionID: "root-session", status: { type: "busy" } },
},
});
await plugin.event({
event: { type: "session.updated", properties: { sessionID: "root-session" } },
});
await plugin.event({
event: { type: "session.updated", properties: { sessionID: "replacement-session" } },
});
expect(requests.map(requestMethod)).toEqual([
"pane.report_agent",
"pane.report_agent_session",
]);
expect(requests.map(requestSessionID)).toEqual(["root-session", "replacement-session"]);
});
function requestMethod(request: unknown): unknown {
return isRecord(request) ? request.method : undefined;
}
function requestState(request: unknown): unknown {
return requestParam(request, "state");
}
function requestSeq(request: unknown): unknown {
return requestParam(request, "seq");
}
function requestSessionID(request: unknown): unknown {
return requestParam(request, "agent_session_id");
}
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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