fast-check/lib/arbitrary/_internals/mappers/VersionsApplierForUuid.js

Property based testing framework for JavaScript (like QuickCheck)

import { Error, safeSubstring } from '../../../utils/globals.js';
const quickNumberToHexaString = '0123456789abcdef';
export function buildVersionsAppliersForUuid(versions) {
    const mapping = {};
    const reversedMapping = {};
    for (let index = 0; index !== versions.length; ++index) {
        const from = quickNumberToHexaString[index];
        const to = quickNumberToHexaString[versions[index]];
        mapping[from] = to;
        reversedMapping[to] = from;
    }
    function versionsApplierMapper(value) {
        return mapping[value[0]] + safeSubstring(value, 1);
    }
    function versionsApplierUnmapper(value) {
        if (typeof value !== 'string') {
            throw new Error('Cannot produce non-string values');
        }
        const rev = reversedMapping[value[0]];
        if (rev === undefined) {
            throw new Error('Cannot produce strings not starting by the version in hexa code');
        }
        return rev + safeSubstring(value, 1);
    }
    return { versionsApplierMapper, versionsApplierUnmapper };
}