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pi-web/src/server/sessions/piSessionService.spawnSession.test.ts
T

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TypeScript

import { describe, expect, it } from "vitest";
import { PiSessionService, type PiAgentSession } from "./piSessionService.js";
import type { SpawnTargetDecision } from "./spawnTargetResolver.js";
import { CapturingSessionEventHub, fakeRuntime, runtimeCreator, sessionGateway, testModel, type RuntimeCreator } from "./piSessionService.testSupport.js";
describe("PiSessionService", () => {
describe("spawnSession", () => {
function spawnService(decision: SpawnTargetDecision) {
const fake = fakeRuntime("spawned-1", { sessionFile: "/tmp/spawned-1.jsonl" });
const log: { details: Record<string, unknown>; message: string }[] = [];
const service = new PiSessionService(new CapturingSessionEventHub(), {
createAgentRuntime: runtimeCreator(fake.runtime),
sessionManager: sessionGateway([]),
spawnTargets: { resolveSpawnTarget: () => Promise.resolve(decision) },
logger: { info: (details, message) => { log.push({ details, message }); } },
heartbeatIntervalMs: 60_000,
});
return { fake, service, log };
}
it("starts a session at the resolved target, delivers the prompt, and logs the spawn", async () => {
const { fake, service, log } = spawnService({ allowed: true, cwd: "/workspace-feature" });
const result = await service.spawnSession({ spawningCwd: "/workspace", prompt: "continue the plan", cwd: "/workspace-feature" });
expect(result).toEqual({ sessionId: "spawned-1", cwd: "/workspace-feature" });
expect(fake.calls.prompt).toEqual([{ text: "continue the plan", options: undefined }]);
expect(log).toEqual([{ details: { spawningCwd: "/workspace", sessionId: "spawned-1", cwd: "/workspace-feature", promptLength: 17 }, message: "spawn_session started a new session" }]);
await service.dispose();
});
it("uses the dispatching session's model as the spawned session's initial model", async () => {
const fake = fakeRuntime("spawned-1", { sessionFile: "/tmp/spawned-1.jsonl" });
const model = testModel();
let initialModel: PiAgentSession["model"];
let delegationToolsEnabled: boolean | undefined;
const createAgentRuntime: RuntimeCreator = async (_createRuntime, options) => {
await Promise.resolve();
initialModel = options.initialModel;
delegationToolsEnabled = options.delegationToolsEnabled;
return fake.runtime;
};
const service = new PiSessionService(new CapturingSessionEventHub(), {
createAgentRuntime,
sessionManager: sessionGateway([]),
spawnTargets: { resolveSpawnTarget: () => Promise.resolve({ allowed: true, cwd: "/workspace-feature" }) },
heartbeatIntervalMs: 60_000,
});
await service.spawnSession({ spawningCwd: "/workspace", prompt: "continue", cwd: "/workspace-feature", model });
expect(initialModel).toBe(model);
expect(delegationToolsEnabled).toBe(true);
await service.dispose();
});
it("rejects an out-of-project target without starting a session", async () => {
const { fake, service } = spawnService({ allowed: false, reason: "out-of-project", allowedCwds: ["/workspace"] });
await expect(service.spawnSession({ spawningCwd: "/workspace", prompt: "go", cwd: "/elsewhere" }))
.rejects.toThrow("cwd must be a workspace of this project. Allowed: /workspace");
expect(fake.calls.prompt).toEqual([]);
expect(service.activeCount()).toBe(0);
await service.dispose();
});
it("rejects when the spawning session is not in a registered project", async () => {
const { service } = spawnService({ allowed: false, reason: "not-registered" });
await expect(service.spawnSession({ spawningCwd: "/workspace", prompt: "go", cwd: undefined }))
.rejects.toThrow("Spawning session is not in a registered project");
await service.dispose();
});
it("is disabled when no spawn target resolver is configured", async () => {
const fake = fakeRuntime("spawned-x");
const service = new PiSessionService(new CapturingSessionEventHub(), {
createAgentRuntime: runtimeCreator(fake.runtime),
sessionManager: sessionGateway([]),
heartbeatIntervalMs: 60_000,
});
await expect(service.spawnSession({ spawningCwd: "/workspace", prompt: "go", cwd: undefined }))
.rejects.toThrow("Spawning sessions is disabled");
await service.dispose();
});
});
});