export interface Assertion<Source extends string> {
    source: Source;
    property: string;
    comparison: string;
    target: string;
    regex: string | null;
}
export declare function toAssertion<Source extends string, Comparison extends string, Target extends string | number | boolean = string>(source: Source, comparison: Comparison, target?: Target, property?: string, regex?: string | null): Assertion<Source>;
export declare class NumericAssertionBuilder<Source extends string, Property extends string = string> {
    source: Source;
    property?: Property;
    constructor(source: Source, property?: Property);
    equals(target: number): Assertion<Source>;
    notEquals(target: number): Assertion<Source>;
    lessThan(target: number): Assertion<Source>;
    greaterThan(target: number): Assertion<Source>;
}
/**
 * General assertion builder supporting string / number / boolean targets.
 *
 * The optional `TargetType` parameter narrows the value-comparison methods
 * (`equals`, `notEquals`, `lessThan`, `greaterThan`)
 * to a specific set of values — e.g. `TlsVersionValue` for TLS version
 * assertions. When omitted it defaults to `string | number | boolean`,
 * preserving full backward compatibility.
 */
export declare class GeneralAssertionBuilder<Source extends string, TargetType extends string | number | boolean = string | number | boolean> {
    source: Source;
    property?: string;
    regex?: string;
    constructor(source: Source, property?: string, regex?: string);
    equals(target: TargetType): Assertion<Source>;
    notEquals(target: TargetType): Assertion<Source>;
    hasKey(target: string): Assertion<Source>;
    notHasKey(target: string): Assertion<Source>;
    hasValue(target: TargetType): Assertion<Source>;
    notHasValue(target: TargetType): Assertion<Source>;
    isEmpty(): Assertion<Source>;
    notEmpty(): Assertion<Source>;
    lessThan(target: TargetType): Assertion<Source>;
    greaterThan(target: TargetType): Assertion<Source>;
    contains(target: string): Assertion<Source>;
    notContains(target: string): Assertion<Source>;
    isNull(): Assertion<Source>;
    isNotNull(): Assertion<Source>;
}