error.txt

Uncaught TypeError: Class constructor Validator cannot be invoked without 'new'

MegaValidator.js

export default class MegaValidator extends Validator {
    constructor(validationLogic) {
        super();
        if (!isFunction(validationLogic)) {
            throw new Error('Validator must have a method for validating.');
        }
        this.validationLogic = validationLogic;
    }

    forThis(entity) {
        this.entity = entity;
        return this;
    }

    using(...requiredQuestions) {
        this.requiredQuestions = requiredQuestions;
        return this;
    }

    isValid() {
        return every(
            getValidators(this.validationLogic, this.requiredQuestions, this.entity),
            validation => validation.validator.isValid(validation.value)
        );
    }
}

Validator.js

export default class Validator {
    constructor(arg) {
        this._arg = arg;
        this.withErrorMessage('Validation failed');
    }

    get arg() {
        return this._arg;
    }

    errorMessage() {
        return this._errorMessage;
    }

    withErrorMessage(errorMessage) {
        this._errorMessage = errorMessage;
        return this;
    }

    forThis() {
        return this;
    }

    validate(obj) {
        if (!this.isValid(obj)) {
            throw new Error(this.errorMessage());
        }
    }

    isValid(obj) {
        throw new Error('Must be implemented in subclass');
    }
}