import events from 'node:events';
import type * as activity from '@temporalio/activity';
import type { ActivityFunction, Logger, MetricMeter } from '@temporalio/common';
import { ActivityCancellationDetails } from '@temporalio/common';
import type { Client } from '@temporalio/client';
import type { ActivityInterceptorsFactory } from '@temporalio/worker';
import type { CancelReason } from '@temporalio/worker/lib/activity';
export interface MockActivityEnvironmentOptions {
    interceptors?: ActivityInterceptorsFactory[];
    logger?: Logger;
    metricMeter?: MetricMeter;
    client?: Client;
}
/**
 * An execution environment for testing Activities.
 *
 * Mocks Activity {@link Context | activity.Context} and exposes hooks for cancellation and heartbeats.
 *
 * Note that the `Context` object used by this environment will be reused for all activities that are run in this
 * environment. Consequently, once `cancel()` is called, any further activity that gets executed in this environment
 * will immediately be in a cancelled state.
 */
export declare class MockActivityEnvironment extends events.EventEmitter {
    cancel: (reason?: CancelReason, details?: ActivityCancellationDetails) => void;
    readonly context: activity.Context;
    private readonly activity;
    constructor(info?: Partial<activity.Info>, opts?: MockActivityEnvironmentOptions);
    /**
     * Run a function in Activity Context
     */
    run<P extends any[], R, F extends ActivityFunction<P, R>>(fn: F, ...args: P): Promise<R>;
}
/**
 * Used as the default activity info for Activities executed in the {@link MockActivityEnvironment}
 *
 * @hidden
 */
export declare const defaultActivityInfo: activity.Info;