Add ISIN Faker for finance module

README.md

@@ -273,6 +273,7 @@ DirPath();
 
 ```rust
 Bic();
+Isin();
 ```
 
 ### UUID

fake/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fake"
-version = "2.9.0"
+version = "2.10.0"
 authors = ["cksac <[email protected]>"]
 description = "An easy to use library for generating fake data like name, number, address, lorem, dates, etc."
 keywords = ["faker", "data", "generator", "random"]

fake/examples/fakers.rs

@@ -289,6 +289,16 @@ fn phone_number_faker() {
     println!("{:?}", val);
 }
 
+fn finance_faker() {
+    use fake::faker::finance::raw::*;
+
+    let val: String = Bic(EN).fake();
+    println!("{:?}", val);
+
+    let val: String = Isin(EN).fake();
+    println!("{:?}", val);
+}
+
 #[cfg(feature = "http")]
 fn http_faker() {
     use fake::faker::http::raw::*;
@@ -534,6 +544,7 @@ fn main() {
     internet_faker();
     number_faker();
     phone_number_faker();
+    finance_faker();
     currency_faker();
     creditcard_faker();
     barcode_faker();

fake/src/faker/impls/finance.rs

@@ -9,6 +9,11 @@
     'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
 ];
 
+const ALPHANUMERIC: &[char; 36] = &[
+    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S',
+    'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+];
+
 const ISO3166: &[&str] = &[
     "AC", "AD", "AE", "AF", "AG", "AI", "AL", "AM", "AN", "AO", "AQ", "AR", "AS", "AT", "AU", "AW",
     "AX", "AZ", "BA", "BB", "BD", "BE", "BF", "BG", "BH", "BI", "BJ", "BL", "BM", "BN", "BO", "BQ",
@@ -71,3 +76,42 @@
         )
     }
 }
+
+fn split_number_to_digits(x: u32) -> Vec<u32> {
+    x.to_string()
+        .chars()
+        .map(|x| x.to_digit(10).unwrap())
+        .collect::<Vec<u32>>()
+}
+
+impl<L: Data> Dummy<Isin<L>> for String {
+    fn dummy_with_rng<R: Rng + ?Sized>(_: &Isin<L>, rng: &mut R) -> Self {
+        let country_code = *ISO3166.choose(rng).unwrap();
+        let nsin = (1..10)
+            .map(|_x| *ALPHANUMERIC.choose(rng).unwrap())
+            .collect::<String>();
+        // Checksum calculation according to Luhn algorithm
+        let char_to_num: Vec<u32> = country_code
+            .chars()
+            .chain(nsin.chars())
+            .map(|x| {
+                if x.is_ascii_digit() {
+                    x.to_digit(10).unwrap()
+                } else {
+                    10 + ((x as u32) - ('A' as u32))
+                }
+            })
+            .flat_map(split_number_to_digits)
+            .collect();
+        let checksum_even = char_to_num.iter().rev().skip(1).step_by(2).sum::<u32>();
+        let checksum_odd = char_to_num
+            .iter()
+            .rev()
+            .step_by(2)
+            .map(|&x| x * 2)
+            .flat_map(split_number_to_digits)
+            .sum::<u32>();
+        let checksum_digit = (10 - ((checksum_even + checksum_odd) % 10)) % 10;
+        return format!("{}{}{}", country_code, nsin, checksum_digit);
+    }
+}

fake/src/faker/impls/internet.rs

@@ -3,11 +3,11 @@ use crate::faker::lorem::raw::Word;
 use crate::faker::name::raw::FirstName;
 use crate::locales::Data;
 use crate::{Dummy, Fake, Faker};
+use deunicode::AsciiChars;
 use rand::distributions::{Distribution, Uniform};
 use rand::seq::SliceRandom;
 use rand::Rng;
 use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
-use deunicode::AsciiChars;
 
 impl<L: Data> Dummy<FreeEmailProvider<L>> for String {
     fn dummy_with_rng<R: Rng + ?Sized>(_: &FreeEmailProvider<L>, rng: &mut R) -> Self {

fake/src/faker/mod.rs

@@ -235,6 +235,7 @@ pub mod currency {
 pub mod finance {
     def_fakers! {
         Bic();
+        Isin();
     }
 }
 

fake/tests/determinism.rs

@@ -188,6 +188,7 @@ check_determinism! { one fake_semver_en, String, Semver(EN) }
 use fake::faker::finance::raw::*;
 
 check_determinism! { l10d Bic; String, fake_bic_en, fake_bic_fr, fake_bic_cn, fake_bic_tw, fake_bic_jp }
+check_determinism! { l10d Isin; String, fake_isin_en, fake_isin_fr, fake_isin_cn, fake_isin_tw, fake_isin_jp}
 
 // HTTP
 #[cfg(feature = "http")]