Fake

A Rust library for generating fake data.

Installation

Default:

[dependencies]
fake = { version = "3.0.1", features = ["derive"] }

Available features:

• derive: if you want to use #[derive(Dummy)]
• supported crates feature flags:
  • chrono
  • chrono-tz
  • http
  • ulid
  • uuid
  • bigdecimal (via bigdecimal-rs)
  • rust_decimal
  • random_color
  • geo
  • semver
  • serde_json
  • time
  • zerocopy
  • glam
  • url
  • indexmap
• always-true-rng: expose AlwaysTrueRng
• maybe-non-empty-collections: allow to use AlwaysTrueRng to generate non-empty collections

Usage

use fake::{Dummy, Fake, Faker};
use rand::rngs::StdRng;
use rand::SeedableRng;

#[derive(Debug, Dummy)]
pub struct Foo {
    #[dummy(faker = "1000..2000")]
    order_id: usize,
    customer: String,
    paid: bool,
}

#[derive(Debug, Dummy)]
struct Bar<T> {
    field: Vec<T>,
}

fn main() {
    // type derived Dummy
    let f: Foo = Faker.fake();
    println!("{:?}", f);

    let b: Bar<Foo> = Faker.fake();
    println!("{:?}", b);

    // using `Faker` to generate default fake value of given type
    let tuple = Faker.fake::<(u8, u32, f32)>();
    println!("tuple {:?}", tuple);
    println!("String {:?}", Faker.fake::<String>());

    // types U can used to generate fake value T, if `T: Dummy<U>`
    println!("String {:?}", (8..20).fake::<String>());
    println!("u32 {:?}", (8..20).fake::<u32>());

    // using `faker` module with locales
    use fake::faker::name::raw::*;
    use fake::locales::*;

    let name: String = Name(EN).fake();
    println!("name {:?}", name);

    let name: String = Name(ZH_TW).fake();
    println!("name {:?}", name);

    // using convenient function without providing locale
    use fake::faker::lorem::en::*;
    let words: Vec<String> = Words(3..5).fake();
    println!("words {:?}", words);

    // using macro to generate nested collection
    let name_vec = fake::vec![String as Name(EN); 4, 3..5, 2];
    println!("random nested vec {:?}", name_vec);

    // fixed seed rng
    let seed = [
        1, 0, 0, 0, 23, 0, 0, 0, 200, 1, 0, 0, 210, 30, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0,
    ];
    let ref mut r = StdRng::from_seed(seed);
    for _ in 0..5 {
        let v: usize = Faker.fake_with_rng(r);
        println!("value from fixed seed {}", v);
    }
}

Fakers with locale

Lorem

Word();
Words(count: Range<usize>);
Sentence(count: Range<usize>);
Sentences(count: Range<usize>);
Paragraph(count: Range<usize>);
Paragraphs(count: Range<usize>);

Name

FirstName();
LastName();
Title();
Suffix();
Name();
NameWithTitle();

Number

Digit();
NumberWithFormat<'a>(fmt: &'a str);

Boolean

Boolean(ratio: u8);

Internet

FreeEmailProvider();
DomainSuffix();
FreeEmail();
SafeEmail();
Username();
Password(len_range: Range<usize>);
IPv4();
IPv6();
IP();
MACAddress();
UserAgent();

HTTP

RfcStatusCode();
ValidStatusCode();

Color

HexColor();
RgbColor();
RgbaColor();
HslColor();
HslaColor();
Color();

Company

CompanySuffix();
CompanyName();
Buzzword();
BuzzwordMiddle();
BuzzwordTail();
CatchPhrase();
BsVerb();
BsAdj();
BsNoun();
Bs();
Profession();
Industry();

Currency

CurrencyCode();
CurrencyName();
CurrencySymbol();

Creditcard

CreditCardNumber();

Address

CityPrefix();
CitySuffix();
CityName();
CountryName();
CountryCode();
StreetSuffix();
StreetName();
TimeZone();
StateName();
StateAbbr();
SecondaryAddressType();
SecondaryAddress();
ZipCode();
PostCode();
BuildingNumber();
Latitude();
Longitude();
Geohash(precision: u8);

Administrative

HealthInsuranceCode();

Automotive

LicencePlate();

Barcode

Isbn();
Isbn13();
Isbn10();

Phone Number

PhoneNumber();
CellNumber();

Date/Time

Time();
Date();
DateTime();
Duration();
DateTimeBefore(dt: DateTime<Utc>);
DateTimeAfter(dt: DateTime<Utc>);
DateTimeBetween(start: DateTime<Utc>, end: DateTime<Utc>);

Filesystem

FilePath();
FileName();
FileExtension();
DirPath();

Finance

Bic();
Isin();

UUID

UUIDv1();
UUIDv3();
UUIDv4();
UUIDv5();

Decimal

Decimal();
PositiveDecimal();
NegativeDecimal();
NoDecimalPoints();

Bigdecimal

BigDecimal();
PositiveBigDecimal();
NegativeBigDecimal();
NoBigDecimalPoints();

Utils

Either

use fake::faker::phone_number::en::{CellNumber, PhoneNumber};
use fake::{utils::{either, WrappedVal}, Dummy, Fake, Faker};

#[derive(Debug, Dummy)]
struct Foo {
    #[dummy(faker = "either(PhoneNumber(), CellNumber())", wrapper = "WrappedVal")]
    phone_number: String,
}

LICENSE

This project is licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.