import type { TestServer } from './server.js';
import type { TestSession, ConnectOpts } from './session.js';
/** Manages several named, independently-authenticated sessions against one server. */
export interface TestHarness {
    /** Get-or-create the session for `name` (connects + handshakes on first use).
     *  `opts` (e.g. `{ layer }`) applies only when the session is first created. */
    user(name: string, opts?: ConnectOpts): Promise<TestSession>;
    /** All sessions created so far, by name. */
    readonly sessions: Map<string, TestSession>;
    /** Close every session (does not close the server). */
    closeAll(): void;
}
/**
 * A thin multi-user layer over a {@link TestServer}: name your users, drive each
 * independently, and assert per-user delivery — e.g. user1 sends, user2 sees the
 * push. Each `user()` is a distinct connection with its own auth key, so logins
 * and updates are isolated exactly as in production.
 *
 * @example
 * ```ts
 * const h = createHarness(server)
 * const alice = await h.user('alice')
 * const bob = await h.user('bob')
 * await alice.invoke('messages.sendMessage', { ... })
 * await bob.expectUpdate('updateNewMessage')
 * h.closeAll()
 * ```
 */
export declare function createHarness<RM>(server: TestServer<RM>): TestHarness;
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