A robust and lightweight data generation library for automating the preparation of test data for frontend unit testing.
- Fastest UUID generation
- Numeric value generation within a specified range
- Random string generation with custom char set and requested lengths
- Person name generation with options for gender, type, length, and language
- Generation of meaningful strings based on a real of prefixes, words, and suffixes
- Support for English and Russian languages
The functionality of the library is implemented using the following functions available to the user:
-
generateUUID(strinctRandom?: boolean)-- the function is used to generate unique identifiers (UUID). In the case of non-strict randomisation, an end-to-end counter is used, converted into a hexadecimal number format string, which is then added to the base UUID. When a certain number is reached, the counter is reset. -
generateNumber(opts: Partial<NumberOpts>)-- a function that returns a random number in a given interval between the minimum and maximum minimum and maximum. If the maximum is less than the minimum, an error is generated. -
generateString(opts: Partial<StringOpts>)-- the function returns a string of random characters of the specified length from a user-defined character set or the default English alphabet. character set defined by the user or from the default English alphabet. -
generatePerson(opts?: Partial<PartNameOpts>)-- the function generates a random first, last or patronymic name depending on the provided parameters such as length, gender and desired case (for Russian). -
generateMeaningfulString(opts?: Partial<MeaningfulStringOpts>)-- based on the prefix trees (tries) for English and Russian languages, the function generates a random meaningful string of a given length, which may include the words or their combinations with delimiters.
type NumberOpts = {
min: number
max: number
}type StringOpts = {
charSet: string[] | string
length: number
}type PartNameOpts = {
gender: 'male' | 'female'
type: 'name' | 'surname' | 'patronymic'
length: 'small' | 'medium' | 'large' | 'extra_large'
language: Language
padej: Case
}type MeaningfulStringOpts = {
length: number
separator: string
language: Language
}type Language = 'en' | 'ru'type Case = 'nominative' | 'genitive' | 'dative' | 'accusative' | 'instrumental' | 'prepositional'npm i -D test-data-utilsyarn add --dev test-data-utilsbun add --dev test-data-utilspnpm i --dev test-data-utilsimport {
generateMeaningfulString,
generateNumber,
generatePerson,
generateString,
generateUUID
} from 'test-data-utils'const {
generateMeaningfulString,
generateNumber,
generatePerson,
generateString,
generateUUID
} = require('test-data-utils')import { generateUUID } from 'test-data-utils'
for (let i = 0; i < 1000; i++) {
console.log(generateUUID())
}/** Output:
* 000f-ffff-ffff-ffff-ffffffffffff
* 001f-ffff-ffff-ffff-ffffffffffff
* 002f-ffff-ffff-ffff-ffffffffffff
* 003f-ffff-ffff-ffff-ffffffffffff
* 004f-ffff-ffff-ffff-ffffffffffff
* 005f-ffff-ffff-ffff-ffffffffffff
* 006f-ffff-ffff-ffff-ffffffffffff
* 007f-ffff-ffff-ffff-ffffffffffff
* 008f-ffff-ffff-ffff-ffffffffffff
* ...
* ...
* ...
* 3dff-ffff-ffff-ffff-ffffffffffff
* 3e0f-ffff-ffff-ffff-ffffffffffff
* 3e1f-ffff-ffff-ffff-ffffffffffff
* 3e2f-ffff-ffff-ffff-ffffffffffff
* 3e3f-ffff-ffff-ffff-ffffffffffff
* 3e4f-ffff-ffff-ffff-ffffffffffff
* 3e5f-ffff-ffff-ffff-ffffffffffff
* 3e6f-ffff-ffff-ffff-ffffffffffff
* 3e7f-ffff-ffff-ffff-ffffffffffff
*/import { generateNumber } from 'test-data-utils'
const stubNumberOpts = {
min: 0,
max: 100
}
console.log(generateNumber(stubNumberOpts))// Output: 85import { generateString } from 'test-data-utils'
const stubStringOpts = {
charSet: 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789',
length: 1000
}
console.log(generateString(stubStringOpts))// Output: 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 { generatePerson } from 'test-data-utils'
const stubPartNameOpts = {
gender: 'female',
type: 'name',
language: 'en'
} as const
const stubPartNameRuOpts = {
gender: 'male',
type: 'surname',
language: 'ru'
} as const
console.log(generatePerson(stubPartNameOpts))
console.log(generatePerson(stubPartNameRuOpts))/** Output:
* Olivia
* Соколов
*/import { generateMeaningfulString } from 'test-data-utils'
const stubMeaningfulStringOpts = {
length: 17,
separator: ' ',
language: 'en'
} as const
const stubMeaningfulRuStringOpts = {
length: 30,
separator: ' ',
language: 'ru'
} as const
console.log(generateMeaningfulString(stubMeaningfulStringOpts))
console.log(generateMeaningfulString(stubMeaningfulRuStringOpts))/** Output:
* trans transquince
* раз разт разтыква разтыквачик
*/