test(suite): comprehensive test suite improvements and new validators

- Update test-utils import path and refactor to helpers/utils.ts
- Migrate all CorpusLoader usage from getFiles() to loadCategory() API
- Add new EN16931 UBL validator with comprehensive validation rules
- Add new XRechnung validator extending EN16931 with German requirements
- Update validator factory to support new validators
- Fix format detector for better XRechnung and EN16931 detection
- Update all test files to use proper import paths
- Improve error handling in security tests
- Fix validation tests to use realistic thresholds
- Add proper namespace handling in corpus validation tests
- Update format detection tests for improved accuracy
- Fix test imports from classes.xinvoice.ts to index.js

All test suites now properly aligned with the updated APIs and realistic performance expectations.

test/test.einvoice.ts

@@ -7,9 +7,9 @@ import type { ExportFormat } from '../ts/interfaces/common.js';
 tap.test('EInvoice should have the correct default properties', async () => {
   const einvoice = new EInvoice();
   
-  expect(einvoice.type).toEqual('invoice');
-  expect(einvoice.invoiceType).toEqual('debitnote');
-  expect(einvoice.status).toEqual('invoice');
+  expect(einvoice.type).toEqual('accounting-doc');
+  expect(einvoice.accountingDocType).toEqual('invoice');
+  expect(einvoice.status).toEqual('issued');
   expect(einvoice.from).toBeTruthy();
   expect(einvoice.to).toBeTruthy();
   expect(einvoice.items).toBeArray();
@@ -20,9 +20,23 @@ tap.test('EInvoice should have the correct default properties', async () => {
 tap.test('EInvoice should export XML in the correct format', async () => {
   const einvoice = new EInvoice();
   einvoice.id = 'TEST-XML-EXPORT';
-  einvoice.invoiceId = 'TEST-XML-EXPORT';
+  einvoice.accountingDocId = 'TEST-XML-EXPORT';
   einvoice.from.name = 'Test Seller';
+  einvoice.from.address = {
+    streetName: 'Seller Street',
+    houseNumber: '1',
+    city: 'Berlin',
+    postalCode: '10115',
+    country: 'Germany'
+  };
   einvoice.to.name = 'Test Buyer';
+  einvoice.to.address = {
+    streetName: 'Buyer Street',
+    houseNumber: '2',
+    city: 'Munich',
+    postalCode: '80331',
+    country: 'Germany'
+  };
   
   // Add an item
   einvoice.items.push({
@@ -98,7 +112,7 @@ tap.test('EInvoice should load XML correctly', async () => {
   const einvoice = await EInvoice.fromXml(sampleXml);
   
   // Check that the EInvoice instance has the expected properties
-  expect(einvoice.id).toEqual('TEST-XML-LOAD');
+  expect(einvoice.accountingDocId).toEqual('TEST-XML-LOAD');
   expect(einvoice.from.name).toEqual('XML Seller');
   expect(einvoice.to.name).toEqual('XML Buyer');
   expect(einvoice.currency).toEqual('EUR');
@@ -109,9 +123,23 @@ tap.test('EInvoice should maintain data integrity through export/import cycle',
   // Create a sample invoice
   const originalInvoice = new EInvoice();
   originalInvoice.id = 'TEST-CIRCULAR';
-  originalInvoice.invoiceId = 'TEST-CIRCULAR';
+  originalInvoice.accountingDocId = 'TEST-CIRCULAR';
   originalInvoice.from.name = 'Circular Seller';
+  originalInvoice.from.address = {
+    streetName: 'Circular Street',
+    houseNumber: '10',
+    city: 'Hamburg',
+    postalCode: '20095',
+    country: 'Germany'
+  };
   originalInvoice.to.name = 'Circular Buyer';
+  originalInvoice.to.address = {
+    streetName: 'Buyer Avenue',
+    houseNumber: '20',
+    city: 'Frankfurt',
+    postalCode: '60311',
+    country: 'Germany'
+  };
   
   // Add an item
   originalInvoice.items.push({
@@ -131,7 +159,7 @@ tap.test('EInvoice should maintain data integrity through export/import cycle',
   const importedInvoice = await EInvoice.fromXml(xml);
   
   // Check that key properties match
-  expect(importedInvoice.id).toEqual(originalInvoice.id);
+  expect(importedInvoice.accountingDocId).toEqual(originalInvoice.accountingDocId);
   expect(importedInvoice.from.name).toEqual(originalInvoice.from.name);
   expect(importedInvoice.to.name).toEqual(originalInvoice.to.name);
   
@@ -146,18 +174,43 @@ tap.test('EInvoice should maintain data integrity through export/import cycle',
 tap.test('EInvoice should validate XML correctly', async () => {
   const einvoice = new EInvoice();
   einvoice.id = 'TEST-VALIDATION';
-  einvoice.invoiceId = 'TEST-VALIDATION';
+  einvoice.accountingDocId = 'TEST-VALIDATION';
   einvoice.from.name = 'Validation Seller';
+  einvoice.from.address = {
+    streetName: 'Validation Street',
+    houseNumber: '5',
+    city: 'Stuttgart',
+    postalCode: '70173',
+    country: 'Germany'
+  };
   einvoice.to.name = 'Validation Buyer';
+  einvoice.to.address = {
+    streetName: 'Test Road',
+    houseNumber: '15',
+    city: 'Cologne',
+    postalCode: '50667',
+    country: 'Germany'
+  };
+  
+  // Add an item to pass BR-16 validation
+  einvoice.items.push({
+    position: 1,
+    name: 'Validation Product',
+    articleNumber: 'VP-001',
+    unitType: 'EA',
+    unitQuantity: 1,
+    unitNetPrice: 50,
+    vatPercentage: 19
+  });
   
   // Export as Factur-X
   const xml = await einvoice.exportXml('facturx');
   
-  // Set the XML string for validation
-  einvoice['xmlString'] = xml;
+  // Create a new invoice from the XML to properly set format
+  const einvoiceForValidation = await EInvoice.fromXml(xml);
   
   // Validate the XML
-  const result = await einvoice.validate(ValidationLevel.SYNTAX);
+  const result = await einvoiceForValidation.validate(ValidationLevel.SYNTAX);
   
   // Check that validation passed
   expect(result.valid).toBeTrue();