my-pi/pi-permission-system/test/authority/subagent-detection.test.ts

import { describe, expect, test } from "vitest";

import type { SubagentDetectionContext } from "#src/authority/subagent-context";
import { SubagentDetection } from "#src/authority/subagent-detection";
import { SubagentSessionRegistry } from "#src/authority/subagent-registry";
import { posixPathFlavor } from "#src/path/path-flavor";

function makeCtx(sessionId: string): SubagentDetectionContext {
  return {
    sessionManager: {
      getSessionDir: () => "",
      getSessionId: () => sessionId,
    },
  };
}

const subagentSessionsDir = "/agent/subagent-sessions";

// The detection sources themselves are covered exhaustively in
// subagent-context.test.ts; these two tests pin the only branches this
// wrapper owns: registry consult and registry-absent fallback.
describe("SubagentDetection.isRegisteredChild", () => {
  test("returns true when the session id is registered", () => {
    const registry = new SubagentSessionRegistry();
    registry.register("child-1", {});
    const detection = new SubagentDetection({
      subagentSessionsDir,
      flavor: posixPathFlavor,
      registry,
    });
    expect(detection.isRegisteredChild(makeCtx("child-1"))).toBe(true);
  });

  test("returns false when constructed without a registry", () => {
    const detection = new SubagentDetection({
      subagentSessionsDir,
      flavor: posixPathFlavor,
    });
    expect(detection.isRegisteredChild(makeCtx("child-1"))).toBe(false);
  });
});