declare module "assert" {
    function assert(value: any, message?: string | Error): asserts value;
    namespace assert {
        class AssertionError implements Error {
            name: string;
            message: string;
            actual: any;
            expected: any;
            operator: string;
            generatedMessage: boolean;
            code: 'ERR_ASSERTION';

            constructor(options?: {
                message?: string; actual?: any; expected?: any;
                operator?: string; stackStartFn?: Function
            });
        }

        type AssertPredicate = RegExp | (new() => object) | ((thrown: any) => boolean) | object | Error;

        function fail(message?: string | Error): never;
        /** @deprecated since v10.0.0 - use fail([message]) or other assert functions instead. */
        function fail(actual: any, expected: any, message?: string | Error, operator?: string, stackStartFn?: Function): never;
        function ok(value: any, message?: string | Error): asserts value;
        /** @deprecated since v9.9.0 - use strictEqual() instead. */
        function equal(actual: any, expected: any, message?: string | Error): void;
        /** @deprecated since v9.9.0 - use notStrictEqual() instead. */
        function notEqual(actual: any, expected: any, message?: string | Error): void;
        /** @deprecated since v9.9.0 - use deepStrictEqual() instead. */
        function deepEqual(actual: any, expected: any, message?: string | Error): void;
        /** @deprecated since v9.9.0 - use notDeepStrictEqual() instead. */
        function notDeepEqual(actual: any, expected: any, message?: string | Error): void;
        function strictEqual<T>(actual: any, expected: T, message?: string | Error): asserts actual is T;
        function notStrictEqual(actual: any, expected: any, message?: string | Error): void;
        function deepStrictEqual<T>(actual: any, expected: T, message?: string | Error): asserts actual is T;
        function notDeepStrictEqual(actual: any, expected: any, message?: string | Error): void;

        function throws(block: () => any, message?: string | Error): void;
        function throws(block: () => any, error: AssertPredicate, message?: string | Error): void;
        function doesNotThrow(block: () => any, message?: string | Error): void;
        function doesNotThrow(block: () => any, error: RegExp | Function, message?: string | Error): void;

        function ifError(value: any): asserts value is null | undefined;

        function rejects(block: (() => Promise<any>) | Promise<any>, message?: string | Error): Promise<void>;
        function rejects(block: (() => Promise<any>) | Promise<any>, error: AssertPredicate, message?: string | Error): Promise<void>;
        function doesNotReject(block: (() => Promise<any>) | Promise<any>, message?: string | Error): Promise<void>;
        function doesNotReject(block: (() => Promise<any>) | Promise<any>, error: RegExp | Function, message?: string | Error): Promise<void>;

        function match(value: string, regExp: RegExp, message?: string | Error): void;
        function doesNotMatch(value: string, regExp: RegExp, message?: string | Error): void;

        const strict: typeof assert;
    }

    export = assert;
}
