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import { expect, tap } from '@git.zone/tstest/tapbundle';
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import * as plugins from '../plugins.js';
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import { EInvoice } from '../../../ts/index.js';
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import { CorpusLoader } from '../corpus.loader.js';
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import { PerformanceTracker } from '../performance.tracker.js';
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tap.test('PDF-07: Metadata Preservation - should preserve PDF metadata during operations', async (t) => {
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// PDF-07: Verify PDF metadata is preserved when embedding/extracting XML
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// This test ensures document properties and metadata remain intact
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const performanceTracker = new PerformanceTracker('PDF-07: Metadata Preservation');
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const corpusLoader = new CorpusLoader();
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t.test('Preserve standard PDF metadata', async () => {
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const startTime = performance.now();
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const { PDFDocument } = plugins;
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const pdfDoc = await PDFDocument.create();
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// Set comprehensive metadata
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const metadata = {
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title: 'Test Invoice 2025-001',
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author: 'Invoice System v3.0',
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subject: 'Monthly Invoice for Services',
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keywords: ['invoice', 'zugferd', 'factur-x', 'electronic', 'billing'],
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creator: 'EInvoice Library',
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producer: 'PDFLib Test Suite',
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creationDate: new Date('2025-01-01T10:00:00Z'),
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modificationDate: new Date('2025-01-25T14:30:00Z')
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};
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pdfDoc.setTitle(metadata.title);
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pdfDoc.setAuthor(metadata.author);
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pdfDoc.setSubject(metadata.subject);
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pdfDoc.setKeywords(metadata.keywords);
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pdfDoc.setCreator(metadata.creator);
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pdfDoc.setProducer(metadata.producer);
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pdfDoc.setCreationDate(metadata.creationDate);
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pdfDoc.setModificationDate(metadata.modificationDate);
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// Add content
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const page = pdfDoc.addPage([595, 842]);
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page.drawText('Invoice with Metadata', { x: 50, y: 750, size: 20 });
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// Add invoice XML
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const xmlContent = `<?xml version="1.0" encoding="UTF-8"?>
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<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2">
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<ID>METADATA-TEST-001</ID>
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<IssueDate>2025-01-25</IssueDate>
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<DocumentCurrencyCode>EUR</DocumentCurrencyCode>
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</Invoice>`;
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await pdfDoc.attach(
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Buffer.from(xmlContent, 'utf8'),
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'invoice.xml',
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{
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mimeType: 'application/xml',
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description: 'Invoice XML data',
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afRelationship: plugins.AFRelationship.Data
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}
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);
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const originalPdfBytes = await pdfDoc.save();
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// Load into EInvoice and process
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const einvoice = new EInvoice();
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await einvoice.loadFromPdfBuffer(originalPdfBytes);
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// Get back as PDF (if supported)
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try {
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const processedPdf = await einvoice.getPdfBuffer();
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// Load processed PDF and check metadata
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const processedDoc = await PDFDocument.load(processedPdf);
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expect(processedDoc.getTitle()).toBe(metadata.title);
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expect(processedDoc.getAuthor()).toBe(metadata.author);
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expect(processedDoc.getSubject()).toBe(metadata.subject);
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expect(processedDoc.getKeywords()).toBe(metadata.keywords.join(', '));
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expect(processedDoc.getCreator()).toBe(metadata.creator);
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console.log('All metadata preserved successfully');
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} catch (error) {
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console.log('PDF metadata preservation not fully supported:', error.message);
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}
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const elapsed = performance.now() - startTime;
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performanceTracker.addMeasurement('standard-metadata', elapsed);
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});
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t.test('Preserve custom metadata properties', async () => {
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const startTime = performance.now();
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const { PDFDocument, PDFDict, PDFName, PDFString } = plugins;
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const pdfDoc = await PDFDocument.create();
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// Add standard content
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const page = pdfDoc.addPage();
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page.drawText('Custom Metadata Test', { x: 50, y: 700, size: 16 });
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// Access the info dictionary for custom properties
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const infoDict = pdfDoc.context.trailerInfo.Info;
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if (infoDict instanceof PDFDict) {
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// Add custom metadata fields
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infoDict.set(PDFName.of('InvoiceNumber'), PDFString.of('INV-2025-001'));
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infoDict.set(PDFName.of('InvoiceDate'), PDFString.of('2025-01-25'));
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infoDict.set(PDFName.of('CustomerID'), PDFString.of('CUST-12345'));
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infoDict.set(PDFName.of('InvoiceType'), PDFString.of('ZUGFeRD 2.1'));
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infoDict.set(PDFName.of('PaymentTerms'), PDFString.of('Net 30 days'));
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infoDict.set(PDFName.of('TaxRate'), PDFString.of('19%'));
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}
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// Add XML attachment
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const xmlContent = `<?xml version="1.0" encoding="UTF-8"?>
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<Invoice>
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<ID>INV-2025-001</ID>
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<CustomerID>CUST-12345</CustomerID>
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</Invoice>`;
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await pdfDoc.attach(
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Buffer.from(xmlContent, 'utf8'),
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'invoice.xml',
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{
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mimeType: 'application/xml',
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description: 'Invoice data with custom metadata'
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}
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);
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const pdfBytes = await pdfDoc.save();
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// Check if custom metadata is readable
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const loadedDoc = await PDFDocument.load(pdfBytes);
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const loadedInfo = loadedDoc.context.trailerInfo.Info;
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if (loadedInfo instanceof PDFDict) {
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const invoiceNum = loadedInfo.get(PDFName.of('InvoiceNumber'));
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console.log('Custom metadata preserved in PDF');
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}
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const elapsed = performance.now() - startTime;
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performanceTracker.addMeasurement('custom-metadata', elapsed);
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});
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t.test('XMP metadata preservation', async () => {
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const startTime = performance.now();
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const { PDFDocument } = plugins;
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// Create XMP metadata
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const xmpMetadata = `<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>
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<x:xmpmeta xmlns:x="adobe:ns:meta/">
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<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
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<rdf:Description rdf:about=""
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xmlns:dc="http://purl.org/dc/elements/1.1/"
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xmlns:pdf="http://ns.adobe.com/pdf/1.3/"
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xmlns:xmp="http://ns.adobe.com/xap/1.0/"
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xmlns:fx="urn:factur-x:pdfa:CrossIndustryDocument:invoice:1p0#">
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<dc:title>
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<rdf:Alt>
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<rdf:li xml:lang="x-default">Electronic Invoice</rdf:li>
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</rdf:Alt>
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</dc:title>
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<dc:creator>
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<rdf:Seq>
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<rdf:li>EInvoice System</rdf:li>
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</rdf:Seq>
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</dc:creator>
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<dc:description>
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<rdf:Alt>
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<rdf:li xml:lang="x-default">ZUGFeRD 2.1 compliant invoice</rdf:li>
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</rdf:Alt>
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</dc:description>
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<pdf:Producer>EInvoice Library with PDFLib</pdf:Producer>
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<xmp:CreateDate>2025-01-25T10:00:00Z</xmp:CreateDate>
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<xmp:ModifyDate>2025-01-25T14:30:00Z</xmp:ModifyDate>
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<fx:DocumentType>INVOICE</fx:DocumentType>
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<fx:DocumentFileName>invoice.xml</fx:DocumentFileName>
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<fx:Version>2.1</fx:Version>
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<fx:ConformanceLevel>EXTENDED</fx:ConformanceLevel>
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</rdf:Description>
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</rdf:RDF>
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</x:xmpmeta>
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<?xpacket end="w"?>`;
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const pdfDoc = await PDFDocument.create();
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// Note: pdf-lib doesn't directly support XMP metadata
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// This would require a more advanced PDF library
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console.log('XMP metadata test - requires advanced PDF library support');
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// Add basic content
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const page = pdfDoc.addPage();
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page.drawText('XMP Metadata Test', { x: 50, y: 700, size: 16 });
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const pdfBytes = await pdfDoc.save();
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const elapsed = performance.now() - startTime;
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performanceTracker.addMeasurement('xmp-metadata', elapsed);
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});
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t.test('Metadata during format conversion', async () => {
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const startTime = performance.now();
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// Test metadata preservation during invoice format conversion
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const xmlContent = `<?xml version="1.0" encoding="UTF-8"?>
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<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2">
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<UBLVersionID>2.1</UBLVersionID>
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<ID>META-CONV-001</ID>
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<IssueDate>2025-01-25</IssueDate>
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<Note>Invoice with metadata for conversion test</Note>
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<DocumentCurrencyCode>EUR</DocumentCurrencyCode>
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<AccountingSupplierParty>
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<Party>
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<PartyName>
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<Name>Test Supplier GmbH</Name>
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</PartyName>
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</Party>
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</AccountingSupplierParty>
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</Invoice>`;
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const { PDFDocument } = plugins;
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const pdfDoc = await PDFDocument.create();
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// Set metadata that should be preserved
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pdfDoc.setTitle('Conversion Test Invoice');
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pdfDoc.setAuthor('Metadata Test Suite');
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pdfDoc.setSubject('Testing metadata preservation during conversion');
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pdfDoc.setKeywords(['conversion', 'metadata', 'test']);
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pdfDoc.setCreationDate(new Date('2025-01-20T09:00:00Z'));
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const page = pdfDoc.addPage();
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page.drawText('Metadata Conversion Test', { x: 50, y: 700, size: 16 });
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await pdfDoc.attach(
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Buffer.from(xmlContent, 'utf8'),
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'invoice.xml',
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{
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mimeType: 'application/xml',
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description: 'Invoice for metadata conversion test'
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}
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);
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const pdfBytes = await pdfDoc.save();
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// Test preservation through EInvoice processing
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const einvoice = new EInvoice();
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await einvoice.loadFromPdfBuffer(pdfBytes);
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// Check if we can still access the metadata
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console.log('Metadata conversion test completed');
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const elapsed = performance.now() - startTime;
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performanceTracker.addMeasurement('conversion-metadata', elapsed);
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});
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t.test('Language and locale metadata', async () => {
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const startTime = performance.now();
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const { PDFDocument } = plugins;
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const pdfDoc = await PDFDocument.create();
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// Set language-specific metadata
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pdfDoc.setTitle('Rechnung Nr. 2025-001');
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pdfDoc.setAuthor('Rechnungssystem v3.0');
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pdfDoc.setSubject('Monatliche Rechnung für Dienstleistungen');
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pdfDoc.setKeywords(['Rechnung', 'ZUGFeRD', 'elektronisch', 'Deutschland']);
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pdfDoc.setLanguage('de-DE'); // German language tag
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const page = pdfDoc.addPage();
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page.drawText('Deutsche Rechnung', { x: 50, y: 700, size: 20 });
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// Add German invoice XML
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const xmlContent = `<?xml version="1.0" encoding="UTF-8"?>
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<rsm:CrossIndustryInvoice xmlns:rsm="urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100">
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<rsm:ExchangedDocument>
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<ram:ID xmlns:ram="urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100">RECHNUNG-2025-001</ram:ID>
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<ram:Name xmlns:ram="urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100">Rechnung</ram:Name>
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<ram:LanguageID xmlns:ram="urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100">de</ram:LanguageID>
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</rsm:ExchangedDocument>
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</rsm:CrossIndustryInvoice>`;
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await pdfDoc.attach(
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Buffer.from(xmlContent, 'utf8'),
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'rechnung.xml',
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{
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mimeType: 'application/xml',
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description: 'Deutsche Rechnungsdaten'
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}
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);
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const pdfBytes = await pdfDoc.save();
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expect(pdfBytes.length).toBeGreaterThan(0);
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console.log('Language metadata test completed');
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const elapsed = performance.now() - startTime;
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performanceTracker.addMeasurement('language-metadata', elapsed);
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});
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t.test('Corpus metadata analysis', async () => {
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const startTime = performance.now();
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let metadataCount = 0;
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let processedCount = 0;
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const metadataTypes = {
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title: 0,
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author: 0,
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subject: 0,
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keywords: 0,
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creator: 0,
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producer: 0
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};
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const files = await corpusLoader.getAllFiles();
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const pdfFiles = files.filter(f => f.endsWith('.pdf'));
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// Sample PDFs for metadata analysis
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const sampleSize = Math.min(40, pdfFiles.length);
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const sample = pdfFiles.slice(0, sampleSize);
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for (const file of sample) {
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try {
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const content = await corpusLoader.readFile(file);
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const { PDFDocument } = plugins;
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try {
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const pdfDoc = await PDFDocument.load(content);
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// Check for metadata
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const title = pdfDoc.getTitle();
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const author = pdfDoc.getAuthor();
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const subject = pdfDoc.getSubject();
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const keywords = pdfDoc.getKeywords();
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const creator = pdfDoc.getCreator();
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const producer = pdfDoc.getProducer();
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if (title || author || subject || keywords || creator || producer) {
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metadataCount++;
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if (title) metadataTypes.title++;
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if (author) metadataTypes.author++;
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if (subject) metadataTypes.subject++;
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if (keywords) metadataTypes.keywords++;
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if (creator) metadataTypes.creator++;
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if (producer) metadataTypes.producer++;
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}
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processedCount++;
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} catch (error) {
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// Skip PDFs that can't be loaded
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}
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} catch (error) {
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console.log(`Error reading ${file}:`, error.message);
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}
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}
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console.log(`Corpus metadata analysis (${processedCount} PDFs):`);
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console.log(`- PDFs with metadata: ${metadataCount}`);
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console.log('Metadata field frequency:', metadataTypes);
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expect(processedCount).toBeGreaterThan(0);
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const elapsed = performance.now() - startTime;
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performanceTracker.addMeasurement('corpus-metadata', elapsed);
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});
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t.test('Metadata size and encoding', async () => {
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const startTime = performance.now();
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const { PDFDocument } = plugins;
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const pdfDoc = await PDFDocument.create();
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// Test with very long metadata values
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const longTitle = 'Invoice ' + 'Document '.repeat(50) + 'Title';
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const longKeywords = Array(100).fill('keyword').map((k, i) => `${k}${i}`);
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const longSubject = 'This is a very detailed subject line that describes the invoice document in great detail. '.repeat(5);
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pdfDoc.setTitle(longTitle.substring(0, 255)); // PDF might have limits
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pdfDoc.setKeywords(longKeywords.slice(0, 50)); // Reasonable limit
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pdfDoc.setSubject(longSubject.substring(0, 500));
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// Test special characters in metadata
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pdfDoc.setAuthor('Müller & Associés S.à r.l.');
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pdfDoc.setCreator('System © 2025 • München');
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const page = pdfDoc.addPage();
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page.drawText('Metadata Size Test', { x: 50, y: 700, size: 16 });
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const pdfBytes = await pdfDoc.save();
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// Verify metadata was set
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const loadedDoc = await PDFDocument.load(pdfBytes);
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const loadedTitle = loadedDoc.getTitle();
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const loadedAuthor = loadedDoc.getAuthor();
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expect(loadedTitle).toBeTruthy();
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expect(loadedAuthor).toContain('Müller');
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console.log('Metadata size and encoding test completed');
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const elapsed = performance.now() - startTime;
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performanceTracker.addMeasurement('metadata-size', elapsed);
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});
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// Print performance summary
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performanceTracker.printSummary();
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// Performance assertions
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const avgTime = performanceTracker.getAverageTime();
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expect(avgTime).toBeLessThan(300); // Metadata operations should be fast
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});
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tap.start();
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Reference in New Issue
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