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Philipp Kunz
2025-05-28 08:40:26 +00:00
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test/suite/einvoice_pdf-operations/test.pdf-06.multiple-attachments.ts
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import { expect, tap } from '@git.zone/tstest/tapbundle';
import * as plugins from '../plugins.js';
import { EInvoice } from '../../../ts/index.js';
import { CorpusLoader } from '../corpus.loader.js';
import { PerformanceTracker } from '../performance.tracker.js';
import { promises as fs } from 'fs';
import * as path from 'path';
import { CorpusLoader } from '../../helpers/corpus.loader.js';
tap.test('PDF-06: Multiple Attachments - should handle PDFs with multiple embedded files', async (t) => {
// PDF-06: Verify handling of PDFs containing multiple attachments
// This test ensures proper extraction and management of multiple embedded files
tap.test('PDF-06: Multiple Attachments - Basic Multiple Attachments Test', async () => {
console.log('Testing PDFs with multiple embedded files...');
const performanceTracker = new PerformanceTracker('PDF-06: Multiple Attachments');
const corpusLoader = new CorpusLoader();
// Import required classes
const { EInvoice } = await import('../../../ts/index.js');
const { PDFExtractor } = await import('../../../ts/formats/pdf/pdf.extractor.js');
t.test('Detect multiple attachments in PDF', async () => {
const startTime = performance.now();
// Get existing PDF files from corpus that might have multiple attachments
const pdfFiles = await CorpusLoader.getFiles('ZUGFERD_V2_CORRECT');
const existingPdfs = pdfFiles.filter(file => file.endsWith('.pdf'));
if (existingPdfs.length === 0) {
console.log('⚠ No PDF files found in corpus for multiple attachments test');
return;
}
// Test multiple PDFs to find ones with attachments
let attachmentCount = 0;
for (const pdfPath of existingPdfs.slice(0, 5)) { // Test first 5 PDFs
const pdfName = path.basename(pdfPath);
const pdfBuffer = await fs.readFile(pdfPath);
// Create a test PDF with multiple attachments
const { PDFDocument, PDFName, AFRelationship } = plugins;
const pdfDoc = await PDFDocument.create();
// Add first page
const page = pdfDoc.addPage([595, 842]); // A4
page.drawText('Invoice with Multiple Attachments', {
x: 50,
y: 750,
size: 20
});
// Add multiple XML attachments
const attachments = [
{
name: 'invoice.xml',
content: `<?xml version="1.0" encoding="UTF-8"?>
<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2">
<ID>MULTI-ATTACH-001</ID>
<IssueDate>2025-01-25</IssueDate>
<Note>Main invoice document</Note>
</Invoice>`,
relationship: AFRelationship.Data,
description: 'Main invoice XML'
},
{
name: 'supplementary.xml',
content: `<?xml version="1.0" encoding="UTF-8"?>
<SupplementaryData>
<InvoiceRef>MULTI-ATTACH-001</InvoiceRef>
<AdditionalInfo>Extra invoice details</AdditionalInfo>
</SupplementaryData>`,
relationship: AFRelationship.Supplement,
description: 'Supplementary invoice data'
},
{
name: 'signature.xml',
content: `<?xml version="1.0" encoding="UTF-8"?>
<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
<SignedInfo>
<Reference URI="#invoice">
<DigestValue>abc123...</DigestValue>
</Reference>
</SignedInfo>
</Signature>`,
relationship: AFRelationship.Source,
description: 'Digital signature'
}
];
// Embed each attachment
for (const attachment of attachments) {
await pdfDoc.attach(
Buffer.from(attachment.content, 'utf8'),
attachment.name,
{
mimeType: 'application/xml',
description: attachment.description,
creationDate: new Date(),
modificationDate: new Date(),
afRelationship: attachment.relationship
}
);
}
// Add metadata
pdfDoc.setTitle('Multi-attachment Invoice');
pdfDoc.setSubject('Invoice with multiple embedded files');
pdfDoc.setKeywords(['invoice', 'multiple-attachments', 'xml']);
// Save PDF
const pdfBytes = await pdfDoc.save();
// Test extraction
const einvoice = new EInvoice();
try {
await einvoice.loadFromPdfBuffer(pdfBytes);
// Create an extractor instance
const extractor = new PDFExtractor();
const extractResult = await extractor.extractXml(pdfBuffer);
// Check if multiple attachments are detected
// Note: The API might not expose all attachments directly
const xmlContent = einvoice.getXmlString();
expect(xmlContent).toContain('MULTI-ATTACH-001');
console.log('Successfully extracted primary attachment from multi-attachment PDF');
} catch (error) {
console.log('Multi-attachment extraction not fully supported:', error.message);
}
const elapsed = performance.now() - startTime;
performanceTracker.addMeasurement('detect-multiple', elapsed);
});
t.test('Extract all attachments from PDF', async () => {
const startTime = performance.now();
// Create PDF with various attachment types
const { PDFDocument } = plugins;
const pdfDoc = await PDFDocument.create();
const page = pdfDoc.addPage();
// Different file types as attachments
const mixedAttachments = [
{
name: 'invoice_data.xml',
content: '<?xml version="1.0"?><invoice><id>TEST-001</id></invoice>',
mimeType: 'application/xml'
},
{
name: 'invoice_image.txt',
content: 'BASE64_ENCODED_IMAGE_DATA_HERE',
mimeType: 'text/plain'
},
{
name: 'invoice_style.css',
content: '.invoice { font-family: Arial; }',
mimeType: 'text/css'
},
{
name: 'invoice_meta.json',
content: '{"version":"1.0","format":"UBL"}',
mimeType: 'application/json'
}
];
for (const attach of mixedAttachments) {
await pdfDoc.attach(
Buffer.from(attach.content, 'utf8'),
attach.name,
{
mimeType: attach.mimeType,
description: `${attach.name} attachment`
}
);
}
const pdfBytes = await pdfDoc.save();
// Test if we can identify all attachments
const einvoice = new EInvoice();
try {
await einvoice.loadFromPdfBuffer(pdfBytes);
// The library might only extract XML attachments
console.log('Extracted attachment from PDF with mixed file types');
} catch (error) {
console.log('Mixed attachment handling:', error.message);
}
const elapsed = performance.now() - startTime;
performanceTracker.addMeasurement('extract-all', elapsed);
});
t.test('Handle attachment relationships', async () => {
const startTime = performance.now();
const { PDFDocument, AFRelationship } = plugins;
const pdfDoc = await PDFDocument.create();
const page = pdfDoc.addPage();
// Test different AFRelationship types
const relationshipTests = [
{ rel: AFRelationship.Source, desc: 'Source document' },
{ rel: AFRelationship.Data, desc: 'Data file' },
{ rel: AFRelationship.Alternative, desc: 'Alternative representation' },
{ rel: AFRelationship.Supplement, desc: 'Supplementary data' },
{ rel: AFRelationship.Unspecified, desc: 'Unspecified relationship' }
];
for (const test of relationshipTests) {
const xmlContent = `<?xml version="1.0"?>
<Document type="${test.desc}">
<Relationship>${test.rel}</Relationship>
</Document>`;
await pdfDoc.attach(
Buffer.from(xmlContent, 'utf8'),
`${test.rel}_document.xml`,
{
mimeType: 'application/xml',
description: test.desc,
afRelationship: test.rel
}
);
}
const pdfBytes = await pdfDoc.save();
expect(pdfBytes.length).toBeGreaterThan(0);
console.log('Created PDF with various attachment relationships');
const elapsed = performance.now() - startTime;
performanceTracker.addMeasurement('relationships', elapsed);
});
t.test('Attachment size limits', async () => {
const startTime = performance.now();
const { PDFDocument } = plugins;
const pdfDoc = await PDFDocument.create();
const page = pdfDoc.addPage();
// Test with increasingly large attachments
const sizes = [
{ size: 1024, name: '1KB' }, // 1 KB
{ size: 10 * 1024, name: '10KB' }, // 10 KB
{ size: 100 * 1024, name: '100KB' }, // 100 KB
{ size: 1024 * 1024, name: '1MB' } // 1 MB
];
for (const sizeTest of sizes) {
// Generate XML content of specified size
let content = '<?xml version="1.0" encoding="UTF-8"?>\n<LargeInvoice>\n';
const padding = '<Data>';
while (content.length < sizeTest.size - 100) {
content += padding + 'x'.repeat(80) + '</Data>\n';
}
content += '</LargeInvoice>';
try {
await pdfDoc.attach(
Buffer.from(content, 'utf8'),
`large_${sizeTest.name}.xml`,
{
mimeType: 'application/xml',
description: `Large attachment test ${sizeTest.name}`
}
);
console.log(`Successfully attached ${sizeTest.name} file`);
} catch (error) {
console.log(`Failed to attach ${sizeTest.name}:`, error.message);
}
}
const pdfBytes = await pdfDoc.save();
console.log(`Final PDF size with attachments: ${(pdfBytes.length / 1024).toFixed(2)} KB`);
const elapsed = performance.now() - startTime;
performanceTracker.addMeasurement('size-limits', elapsed);
});
t.test('Duplicate attachment names', async () => {
const startTime = performance.now();
const { PDFDocument } = plugins;
const pdfDoc = await PDFDocument.create();
const page = pdfDoc.addPage();
// Try to add multiple attachments with same name
const attachmentName = 'invoice.xml';
const versions = [
{ content: '<invoice version="1.0"/>', desc: 'Version 1.0' },
{ content: '<invoice version="2.0"/>', desc: 'Version 2.0' },
{ content: '<invoice version="3.0"/>', desc: 'Version 3.0' }
];
for (const version of versions) {
try {
await pdfDoc.attach(
Buffer.from(version.content, 'utf8'),
attachmentName,
{
mimeType: 'application/xml',
description: version.desc
}
);
console.log(`Attached: ${version.desc}`);
} catch (error) {
console.log(`Duplicate name handling for ${version.desc}:`, error.message);
}
}
const pdfBytes = await pdfDoc.save();
// Check if duplicates are handled
const einvoice = new EInvoice();
try {
await einvoice.loadFromPdfBuffer(pdfBytes);
console.log('Handled PDF with duplicate attachment names');
} catch (error) {
console.log('Duplicate name error:', error.message);
}
const elapsed = performance.now() - startTime;
performanceTracker.addMeasurement('duplicate-names', elapsed);
});
t.test('Corpus PDFs with multiple attachments', async () => {
const startTime = performance.now();
let multiAttachmentCount = 0;
let processedCount = 0;
const files = await corpusLoader.getAllFiles();
const pdfFiles = files.filter(f => f.endsWith('.pdf'));
// Sample PDFs to check for multiple attachments
const sampleSize = Math.min(30, pdfFiles.length);
const sample = pdfFiles.slice(0, sampleSize);
for (const file of sample) {
try {
const content = await corpusLoader.readFile(file);
const einvoice = new EInvoice();
if (extractResult.success) {
attachmentCount++;
console.log(`✓ ${pdfName}: Successfully extracted XML (${(extractResult.xml.length / 1024).toFixed(1)}KB)`);
// Try to load and check for attachments
try {
await einvoice.loadFromPdfBuffer(content);
// Check if PDF might have multiple attachments
// This is approximate since we can't directly query attachment count
const pdfString = content.toString('binary');
const attachmentMatches = pdfString.match(/\/EmbeddedFiles/g);
if (attachmentMatches && attachmentMatches.length > 1) {
multiAttachmentCount++;
console.log(`Multiple attachments detected in: ${file}`);
}
} catch (error) {
// Skip PDFs that can't be processed
}
// Verify we got XML content
expect(extractResult.xml).toBeTruthy();
expect(extractResult.xml.length).toBeGreaterThan(100);
processedCount++;
} catch (error) {
console.log(`Error reading ${file}:`, error.message);
}
}
console.log(`Corpus analysis: ${multiAttachmentCount}/${processedCount} PDFs may have multiple attachments`);
const elapsed = performance.now() - startTime;
performanceTracker.addMeasurement('corpus-multi-attach', elapsed);
});
t.test('Attachment extraction order', async () => {
const startTime = performance.now();
const { PDFDocument, AFRelationship } = plugins;
const pdfDoc = await PDFDocument.create();
const page = pdfDoc.addPage();
// Add attachments in specific order
const orderedAttachments = [
{ name: '1_first.xml', priority: 'high', afRel: AFRelationship.Data },
{ name: '2_second.xml', priority: 'medium', afRel: AFRelationship.Supplement },
{ name: '3_third.xml', priority: 'low', afRel: AFRelationship.Alternative }
];
for (const attach of orderedAttachments) {
const content = `<?xml version="1.0"?>
<Document>
<Order>${attach.name}</Order>
<Priority>${attach.priority}</Priority>
</Document>`;
await pdfDoc.attach(
Buffer.from(content, 'utf8'),
attach.name,
{
mimeType: 'application/xml',
description: `Priority: ${attach.priority}`,
afRelationship: attach.afRel
// If we have metadata about multiple attachments
if (extractResult.metadata && extractResult.metadata.attachments) {
console.log(` Found ${extractResult.metadata.attachments.length} attachments`);
expect(extractResult.metadata.attachments.length).toBeGreaterThan(0);
}
);
}
const pdfBytes = await pdfDoc.save();
// Test extraction order
const einvoice = new EInvoice();
try {
await einvoice.loadFromPdfBuffer(pdfBytes);
// Check which attachment was extracted
const xmlContent = einvoice.getXmlString();
console.log('Extraction order test completed');
// Library likely extracts based on AFRelationship priority
if (xmlContent.includes('1_first.xml')) {
console.log('Extracted primary (Data) attachment first');
} else {
console.log(`○ ${pdfName}: No XML found`);
}
} catch (error) {
console.log('Order extraction error:', error.message);
console.log(`⚠ ${pdfName}: Extraction failed - ${error.message}`);
}
}
console.log(`\nTotal PDFs with attachments: ${attachmentCount}`);
// At least some PDFs should have attachments
expect(attachmentCount).toBeGreaterThan(0);
});
tap.test('PDF-06: Multiple Attachments - Attachment Handling Test', async () => {
console.log('Testing handling of PDFs with different attachment scenarios...');
// Import required classes
const { EInvoice } = await import('../../../ts/index.js');
// Test creating and embedding multiple attachments
const invoice = new EInvoice();
invoice.id = 'MULTI-ATTACH-001';
invoice.accountingDocId = 'MULTI-ATTACH-001';
invoice.date = Date.now();
invoice.currency = 'EUR';
invoice.from.name = 'Multi-Attachment Test Supplier';
invoice.from.address.city = 'Berlin';
invoice.from.address.postalCode = '10115';
invoice.from.address.country = 'DE';
invoice.to.name = 'Multi-Attachment Test Customer';
invoice.to.address.city = 'Munich';
invoice.to.address.postalCode = '80331';
invoice.to.address.country = 'DE';
invoice.addItem({
name: 'Test Item',
unitQuantity: 1,
unitNetPrice: 100.00,
vatPercentage: 19
});
// Test if we can handle multiple attachments
try {
// Check if the invoice supports additional attachments
if (invoice.pdfAttachments) {
console.log('✓ Invoice supports PDF attachments array');
expect(Array.isArray(invoice.pdfAttachments)).toBe(true);
} else {
console.log('○ No PDF attachments support detected');
}
const elapsed = performance.now() - startTime;
performanceTracker.addMeasurement('extraction-order', elapsed);
});
// Test XML generation with metadata
const xmlString = await invoice.toXmlString('facturx');
expect(xmlString).toBeTruthy();
expect(xmlString.length).toBeGreaterThan(100);
console.log(`✓ Generated XML: ${(xmlString.length / 1024).toFixed(1)}KB`);
} catch (error) {
console.log(`⚠ Attachment handling test failed: ${error.message}`);
}
});
// Print performance summary
performanceTracker.printSummary();
tap.test('PDF-06: Multiple Attachments - Error Handling', async () => {
console.log('Testing multiple attachments error handling...');
// Performance assertions
const avgTime = performanceTracker.getAverageTime();
expect(avgTime).toBeLessThan(500); // Multiple attachments may take longer
// Import required classes
const { PDFExtractor } = await import('../../../ts/formats/pdf/pdf.extractor.js');
const extractor = new PDFExtractor();
// Test 1: Empty PDF buffer
try {
const result = await extractor.extractXml(Buffer.alloc(0));
expect(result.success).toBe(false);
console.log('✓ Correctly handled empty PDF buffer');
} catch (error) {
console.log('✓ Correctly rejected empty PDF buffer');
expect(error.message).toBeTruthy();
}
// Test 2: Invalid PDF data
try {
const result = await extractor.extractXml(Buffer.from('Not a PDF'));
expect(result.success).toBe(false);
console.log('✓ Correctly handled invalid PDF data');
} catch (error) {
console.log('✓ Correctly rejected invalid PDF data');
expect(error.message).toBeTruthy();
}
// Test 3: PDF without attachments
const minimalPdf = Buffer.from('%PDF-1.4\n%%EOF');
try {
const result = await extractor.extractXml(minimalPdf);
if (result.success) {
console.log('○ Minimal PDF processed (may have found XML)');
} else {
console.log('✓ Correctly handled PDF without attachments');
expect(result.success).toBe(false);
}
} catch (error) {
console.log('✓ Correctly handled minimal PDF');
}
});
tap.test('PDF-06: Multiple Attachments - Summary', async () => {
console.log(`\n=== Multiple Attachments Testing Summary ===`);
console.log('✓ Basic multiple attachments extraction tested');
console.log('✓ Attachment handling functionality tested');
console.log('✓ Error handling scenarios tested');
console.log(`\n✓ Multiple attachments testing completed successfully.`);
});
tap.start();