Function onExit

src/server/web/__tests__/session-manager.test.ts:16–19

(handler: (e: { exitCode: number; signal: number }) => void)

      return { dispose() {} };
    },
    onExit(handler: (e: { exitCode: number; signal: number }) => void) {
      mockPty._exitHandler = handler;
      return { dispose() {} };
    },
    write: mock.fn(),
    resize: mock.fn(),
    kill: mock.fn(),