Enhances property-based testing with a diverse collection of arbitrary generators for domains like stock prices, brand names, wine reviews, and more.
A collection of Arb's that work with Kotest property testing for many different domains, such as stock prices, brand names, wine reviews, countries, tube stations and so on.
See full docs at the main Kotest site.
| Arb | Description | Example |
|---|
Arb.addresses() | Generates a postal address with street, city, country, and postcode. | 6406 BROWN BIRCH PARK |
Arb.airJourney() | Generates a flight as a departure airport, arrival airport, and airline. | AirJourney(departure=Airport(name=Koumala Airport, ...), arrival=Airport(name=Agrinion Air Base, ...), distanceKm=337.07, airline=Airline(name=Omni Air Express)) |
Arb.airline() | Generates a real-world airline with name and IATA code. | Airline(name=MAXjet) |
Arb.airport() | Generates a real-world airport with name, IATA/ICAO codes, and location. | Airport(name=Minsk National Airport, lat=53.8881, long=28.0400, country=BY, iataCode=MSQ) |
Arb.boardGame() | Generates a board game with name, publisher, type, and recommended player count. | BoardGame(name=7 Wonders, publisher=Repos Production, type=Card drafting, recommendedPlayers=3-7) |
Arb.brand() | Generates a real-world product brand name. | Brand(value=Kryptonics) |
Arb.cars() | Generates a car manufacturer name. | Car(value=Citroën) |
Arb.chessMove() | Generates a chess move from a piece, source square, and destination square. | ChessMove(from=D5, to=C2, capture=null) |
Arb.chessPiece() | Generates a chess piece (king, queen, rook, bishop, knight, pawn). | ChessPiece(name=Knight, points=5) |
Arb.chessSquare() | Generates a chess board square in algebraic notation. | B1 |
Arb.cluedoAccusations() | Generates a Cluedo accusation combining suspect, weapon, and location. | CluedoAccusation(suspect=CluedoSuspect(name=Professor Plum), weapon=CluedoWeapon(name=Spanner), location=CluedoLocation(name=Study), correctGuess=false) |
Arb.cluedoLocations() | Generates a Cluedo location (Ballroom, Library, Kitchen, ...). | CluedoLocation(name=Ballroom) |
Arb.cluedoSuspects() | Generates a Cluedo suspect (Colonel Mustard, Miss Scarlett, ...). | CluedoSuspect(name=Professor Plum) |
Arb.cluedoWeapons() | Generates a Cluedo weapon (Revolver, Dagger, Spanner, ...). | CluedoWeapon(name=Candlestick) |
Arb.color() | Generates a colour name. | Color(value=squash) |
Arb.continent() | Generates one of the seven continents. | Europe |
Arb.country() | Generates a country with ISO codes and continent. | Country(name=Macedonia, isoNumber3=807, isoAlpha2=MK, isoAlpha3=MKD, continent=Europe) |
Arb.domain() | Generates a plausible internet domain name with configurable length. | Domain(value=cdn.nnj.ug) |
Arb.firstName() | Generates a first name. | FirstName(name=Jerrod) |
Arb.googleTaxonomy() | Generates a Google Product Taxonomy category string. | GoogleTaxonomy(value=Home & Garden > Bathroom Accessories > Toilet Brush Replacement Heads) |
Arb.greekIsland() | Generates a Greek island with capital and the seas it borders. | GreekIsland(name=Skiathos, capital=Skiathos, seas=[Aegean Sea]) |
Arb.harryPotterCharacter() | Generates a Harry Potter character from first and last names. | Character(firstName=Cedric, lastName=Riddle) |
Arb.iceCreamFlavors() | Generates an ice-cream flavour. | IceCreamFlavor(value=Frog Tracks) |
Arb.iceCreams() | Generates an ice cream as a combination of flavour, scoops, and cone. | IceCreamServing(scoops=4, coneType=Waffle, size=Large, flavors=[Maple Pecan, Irish Cream, Georgia Peach, Lemon Coconut]) |
Arb.lastName() | Generates a last name. | LastName(name=KOLB) |
Arb.logins() | Generates a login with a username, IP, geolocation, and result. | Login(timestamp=9099118923, username=Username(value=maxi_purple_beetle_2085), ipAddress=180.49.97.115, result=success) |
Arb.movie() | Generates a well-known film title. | Movie(title=Fight Club) |
Arb.movieRole() | Generates a famous movie character/role name. | MovieRole(name=László Tóth) |
Arb.movieStar() | Generates the name of a well-known movie star. | MovieStar(name=Marlon Brando) |
Arb.movieStarRole() | Generates a (star, movie, role) triple. | MovieStarRole(star=MovieStar(name=Samuel L. Jackson), movie=Movie(title=Eternal Sunshine of the Spotless Mind), role=MovieRole(name=Han Solo)) |
Arb.name() | Generates a full name composed of a random first and last name. | Name(first=FirstName(name=Elenor), last=LastName(name=WINGATE)) |
Arb.products() | Generates a product with SKU, GTIN, brand, colour, and taxonomy. | Product(sku=Sku(value=UXZ29548749), brand=Brand(value=Singing Machine), gtin=Gtin(value=359888366944), price=23743, color=Color(value=silver), name=zipped jacket, ...) |
Arb.stockExchanges() | Generates a stock exchange with name, symbol, and country. | StockExchange(name=Saudi Stock Exchange, symbol=Tadawul, country=Country(name=Saudi Arabia, ...)) |
Arb.streamingService() | Generates the name of a video streaming service. | Tubi |
Arb.transactions() | Generates a financial transaction with date, amount, and card details. | Transaction(date=2019-06-01T10:30:38, txType=Recurring, cardType=GooglePay, country=Country(name=Israel, ...), amount=566277) |
Arb.tubeJourney() | Generates a London Underground journey between two stations. | Journey(start=Station(name=Bermondsey, zone=2.0, ...), end=Station(name=South Ealing, zone=3.0, ...), durationMinutes=19, farePence=620, method=Oyster) |
Arb.tubeStation() | Generates a London Underground station with zone and line counts. | Station(id=130, name=Hounslow Central, zone=4.0, lines=1) |
Arb.ukPrimeMinister() | Generates a UK Prime Minister with party and years in office. | UkPrimeMinister(name=Theresa May, party=Conservative, yearsInOffice=2016-2019) |
Arb.usernames() | Generates a plausible username string. | Username(value=small_brown_pig_5883) |
Arb.vineyards() | Generates a vineyard name. | Vineyard(value=Magnificat) |
Arb.wineRegions() | Generates a wine region. | WineRegion(value=Vino Spumante) |
Arb.wineReviews() | Generates a wine review combining a wine with a score and reviewer. | WineReview(wine=Wine(vineyard=..., variety=Chardonnay, winery=Prim Family, region=Alto Adige, year=1955), rating=1.31, name=...) |
Arb.wineries() | Generates a winery name. | Winery(value=Dr. H. Thanisch (Erben Thanisch)) |
Arb.wines() | Generates a wine combining vineyard, region, winery, and variety. | Wine(vineyard=Vineyard(value=Trocken), variety=Chenin Blanc-Chardonnay, winery=Eleven Eleven, region=Vittoria, year=1928) |
Arb.wineVarities() | Generates a wine variety (Cabernet, Merlot, Riesling, ...). | WineVariety(value=Nebbiolo) |
Arb.zipcodes() | Generates a 5-digit US zip code as a string. | 99636 |
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