Added unit tests, put IBAN in a separate class.

frontend/package.json

@@ -1,10 +1,11 @@
 {
   "name": "digidecs",
   "type": "module",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "private": true,
   "scripts": {
     "dev": "vite",
+    "test": "vitest --config './src/tests/vitest.config.ts'",
     "build": "vue-tsc --noEmit && vite build",
     "preview": "vite preview",
     "lint": "eslint . --fix --ignore-path .gitignore"
@@ -14,7 +15,7 @@
     "base64-arraybuffer": "^1.0.2",
     "core-js": "^3.29.0",
     "roboto-fontface": "*",
-    "vue": "^3.2.0",
+    "vue": "^3.5.13",
     "vue-i18n": "9",
     "vue-router": "^4.0.0",
     "vuetify": "^3.0.0"
@@ -26,7 +27,7 @@
     "@typescript-eslint/eslint-plugin": "^8.4.0",
     "@typescript-eslint/parser": "^8.4.0",
     "@vitejs/plugin-vue": "^4.0.0",
-    "@vue/eslint-config-typescript": "^11.0.0",
+    "@vue/test-utils": "^2.4.6",
     "eslint": "^9.9.1",
     "eslint-plugin-vue": "^9.28.0",
     "sass": "^1.60.0",
@@ -35,6 +36,8 @@
     "unplugin-fonts": "^1.0.3",
     "vite": "^4.2.0",
     "vite-plugin-vuetify": "^1.0.0",
+    "vite-tsconfig-paths": "^5.1.4",
+    "vitest": "^3.0.5",
     "vue-tsc": "^2.1.8"
   }
 }

frontend/src/scripts/iban.ts

@@ -0,0 +1,26 @@
+export abstract class IBAN{
+
+  static checkIBAN(iban: string): boolean {  
+    // Tested with:
+    // GB33BUKB20201555555555 (correct)
+    // GB94BARC10201530093459 (correct)
+    // gB94BARC10201530093459 (correct, evaluates to its uppercase equivalent)
+    // GB94BARC20201530093459 (incorrect checksum)
+    iban = iban.toUpperCase();
+    const ibanRegex = /^[A-Z]{2}[0-9]{2}[A-Z0-9]{1,30}$/;
+    if (!ibanRegex.test(iban)) {
+      return false;
+    }
+
+    // ISO/IEC 7064:2003
+    // Convert IBAN to numeric representation (rearrange and replace letter with corresponding numeric value)
+    const numericIban = (iban.slice(4) + iban.slice(0,4))
+    .replace(/[A-Z]/g, char => (parseInt(char, 36)).toString());
+    // Match only sequences of 1-7 digits, convert each to number and add, then take result mod 97.
+    const remainder = numericIban
+      .match(/\d{1,7}/g)?.reduce((acc, block) => Number(acc + block) % 97, 0); 
+    return remainder===1;
+  }
+
+
+}

frontend/src/tests/IBAN.test.js

@@ -0,0 +1,32 @@
+import { describe, it, expect } from 'vitest';
+import { mount } from '@vue/test-utils';
+import { checkIBAN } from '../views/HomeView.vue';
+import {IBAN} from "../scripts/iban";
+
+
+describe('checkIBAN', () => {
+  it('should return true for a valid IBAN', () => {
+    const validIBAN = 'DE89370400440532013000';
+    expect(IBAN.checkIBAN(validIBAN)).toBe(true);
+  });
+
+  it('should return false for an invalid IBAN', () => {
+    const invalidIBAN = 'DE89370400440532013001';
+    expect(IBAN.checkIBAN(invalidIBAN)).toBe(false);
+  });
+
+  it('should return false for an IBAN with incorrect length', () => {
+    const shortIBAN = 'DE8937040044053201300';
+    expect(IBAN.checkIBAN(shortIBAN)).toBe(false);
+  });
+
+  it('should return false for an IBAN with invalid characters', () => {
+    const invalidCharIBAN = 'DE89$70400440532013000';
+    expect(IBAN.checkIBAN(invalidCharIBAN)).toBe(false);
+  });
+
+  it('should return false for an empty IBAN', () => {
+    const emptyIBAN = '';
+    expect(IBAN.checkIBAN(emptyIBAN)).toBe(false);
+  });
+});

frontend/src/tests/vitest.config.ts

@@ -0,0 +1,15 @@
+import { defineConfig } from 'vitest/config';
+import vue from "@vitejs/plugin-vue";
+import viteTsconfigPaths from 'vite-tsconfig-paths';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    coverage: {
+      reporter: ['text', 'json', 'html'],
+    },
+    include: ["src/tests/*.test.js"],
+  },
+  plugins: [vue(),viteTsconfigPaths()], 
+});

frontend/src/views/HomeView.vue

@@ -120,6 +120,7 @@ import {defineComponent} from "vue";
 import {InputValidationRules} from "@/main";
 import {Digidecs} from "@/scripts/digidecs";
 import MaterialBanner from "@/views/components/MaterialBanner.vue";
+import {IBAN} from "@/scripts/iban";
 
 interface Data {
   error: string | undefined,
@@ -145,28 +146,6 @@ interface Data {
   }
 }
 
-function checkIBAN(iban: string): boolean {  
-  // Tested with:
-  // GB33BUKB20201555555555 (correct)
-  // GB94BARC10201530093459 (correct)
-  // gB94BARC10201530093459 (correct, evaluates to its uppercase equivalent)
-  // GB94BARC20201530093459 (incorrect checksum)
-  iban = iban.toUpperCase();
-  const ibanRegex = /^[A-Z]{2}[0-9]{2}[A-Z0-9]{1,30}$/;
-  if (!ibanRegex.test(iban)) {
-    return false;
-  }
-
-  // ISO/IEC 7064:2003
-  // Convert IBAN to numeric representation (rearrange and replace letter with corresponding numeric value)
-  const numericIban = (iban.slice(4) + iban.slice(0,4))
-  .replace(/[A-Z]/g, char => (parseInt(char, 36)).toString());
-  // Match only sequences of 1-7 digits, convert each to number and add, then take result mod 97.
-  const remainder = numericIban
-    .match(/\d{1,7}/g)?.reduce((acc, block) => Number(acc + block) % 97, 0); 
-  return remainder===1;
-}
-
 export default defineComponent({
   components: {MaterialBanner},
   data(): Data {
@@ -180,7 +159,7 @@ export default defineComponent({
         ],
         iban: [
           v => !!v || this.$t("home.form.rules.required"),
-          v => checkIBAN(v) || this.$t("home.form.rules.ibanInvalid")
+          v => IBAN.checkIBAN(v) || this.$t("home.form.rules.ibanInvalid")
         ],
         email: [
           v => !!v || this.$t("home.form.rules.required"),

frontend/tsconfig.json

@@ -17,7 +17,8 @@
       "@/*": [
         "src/*"
       ]
-    }
+    },
+    "allowJs": true, // Necessary for vitest to work
   },
   "include": [
     "src/**/*.ts",