import { ChildProcessWithoutNullStreams } from 'node:child_process';
export interface TestInstance {
    clear: () => void;
    process: ChildProcessWithoutNullStreams;
    stdoutArr: Array<{
        contents: Buffer | string;
        timestamp: number;
    }>;
    stderrArr: Array<{
        contents: Buffer | string;
        timestamp: number;
    }>;
    getStdallStr: () => string;
    hasExit: () => null | {
        exitCode: number;
    };
    debug: (maxLength?: number) => void;
}
declare global {
    const jest: undefined | any;
    const vi: undefined | any;
    const afterEach: undefined | ((fn: () => void) => void);
    const teardown: undefined | ((fn: () => void) => void);
    const expect: undefined | any;
}