@snipsonian/core/es/assert/index.js

Core/base reusable javascript code snippets

import isFunction from '../is/isFunction';
import replacePlaceholders from '../string/replacePlaceholders';
export default function assert(val, validator, errorMessage = 'Assertion error for value \'{val}\'.') {
    assertValidValidator(validator);
    if (!validator(val)) {
        throw new Error(replacePlaceholders({ msg: errorMessage, placeholders: { val } }));
    }
}
function assertValidValidator(validator) {
    if (!isFunction(validator)) {
        throw new Error('Please provide a validator function.');
    }
}