/**
 * Base class for route and body parameters and
 */
declare abstract class RequestParameter {
    name: string;
    required: boolean;
    additionalTests: Array<RequestParameterTestFunction>;
    description: string;
    /**
     * runs test functions in the additional tests Array and returns an array of errors, or an empty arrays if no errors.
     * @param value - parameter value
     */
    runTests(value: any): Array<string>;
}
/**
 * Defines a parameter expected to be present in the request's body
 */
export declare class BodyParameter extends RequestParameter {
    type: ParameterType;
    nullable: boolean;
    /**
     * Constructs a BodyParameter instance
     * @constructor
     * @param name - property name
     * @param type - the expected type of the parameter. if defined, will throw an error if the parameter's type doesn't match
     * @param required - if true, will throw an error when the property is missing
     * @param description - text that will be displayed in the rendered help output
     * @param additionalTests - an array of additional test functions and their description
     * @param nullable - is parameter value nullable. allows to make parameter required and exclude type validation when value is null
     */
    constructor(name: string, type?: ParameterType, description?: string, required?: boolean, additionalTests?: Array<RequestParameterTestFunction>, nullable?: boolean);
}
/**
 * Defines a parameter expected to be present in the request's route
 */
export declare class RouteParameter extends RequestParameter {
    /**
     * Constructs a BodyParameter instance
     * @constructor
     * @param name - property name
     * @param required - if true, will throw an error when the property is missing
     * @param description - text that will be displayed in the rendered help output
     * @param additionalTests - an array of additional test functions and their description
     */
    constructor(name: string, description?: string, required?: boolean, additionalTests?: Array<RequestParameterTestFunction>);
}
/**
 * A test function and test description for testing request parameters
 */
export interface RequestParameterTestFunction {
    /**
     * a test function that receives the parameter value as an argument and returns a boolean
     * @param value - parameter value passed by the test routine
     */
    test(value: any): boolean;
    /**
     * an optional description of the test that will be displayed in the error output in case the function returns false
     */
    description: string;
}
/**
 * Optional types for a body parameter
 */
export declare type ParameterType = 'string' | 'number' | 'boolean' | 'object' | 'array' | 'parsableDateString' | 'null' | 'any';
export {};
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