Merge branch 'n1073645-Luhn'

This commit is contained in:
n1474335 2020-03-05 15:19:37 +00:00
commit 3d1266f815
4 changed files with 108 additions and 0 deletions

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@ -332,6 +332,7 @@
"Fletcher-32 Checksum",
"Fletcher-64 Checksum",
"Adler-32 Checksum",
"Luhn Checksum",
"CRC-8 Checksum",
"CRC-16 Checksum",
"CRC-32 Checksum",

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@ -0,0 +1,62 @@
/**
* @author n1073645 [n1073645@gmail.com]
* @copyright Crown Copyright 2020
* @license Apache-2.0
*/
import Operation from "../Operation.mjs";
import OperationError from "../errors/OperationError.mjs";
/**
* Luhn Checksum operation
*/
class LuhnChecksum extends Operation {
/**
* LuhnChecksum constructor
*/
constructor() {
super();
this.name = "Luhn Checksum";
this.module = "Default";
this.description = "The Luhn algorithm, also known as the modulus 10 or mod 10 algorithm, is a simple checksum formula used to validate a variety of identification numbers, such as credit card numbers, IMEI numbers and Canadian Social Insurance Numbers.";
this.infoURL = "https://wikipedia.org/wiki/Luhn_algorithm";
this.inputType = "string";
this.outputType = "number";
this.args = [];
}
/**
* @param {string} input
* @param {Object[]} args
* @returns {number}
*/
run(input, args) {
let even = false;
return input.split("").reverse().reduce((acc, elem) => {
// Convert element to integer.
let temp = parseInt(elem, 10);
// If element is not an integer.
if (isNaN(temp))
throw new OperationError("Character: " + elem + " is not a digit.");
// If element is in an even position
if (even) {
// Double the element and add the quotient and remainder together.
temp = 2 * elem;
temp = Math.floor(temp/10) + (temp % 10);
}
even = !even;
return acc + temp;
}, 0) % 10;
}
}
export default LuhnChecksum;

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@ -97,6 +97,7 @@ import "./tests/DefangIP.mjs";
import "./tests/ParseUDP.mjs";
import "./tests/AvroToJSON.mjs";
import "./tests/Lorenz.mjs";
import "./tests/LuhnChecksum.mjs";
// Cannot test operations that use the File type yet

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@ -0,0 +1,44 @@
/**
* From Decimal tests
*
* @author n1073645 [n1073645@gmail.com]
* @copyright Crown Copyright 2020
* @licence Apache-2.0
*/
import TestRegister from "../../lib/TestRegister.mjs";
TestRegister.addTests([
{
name: "Luhn Checksum on standard data",
input: "35641709012469",
expectedOutput: "7",
recipeConfig: [
{
op: "Luhn Checksum",
args: []
},
],
},
{
name: "Luhn Checksum on invalid data",
input: "35641709b012469",
expectedOutput: "Character: b is not a digit.",
recipeConfig: [
{
op: "Luhn Checksum",
args: []
},
],
},
{
name: "Luhn Checksum on empty data",
input: "",
expectedOutput: "0",
recipeConfig: [
{
op: "Luhn Checksum",
args: []
},
],
}
]);