test: Update tests for tuple return type and new API structure
- Update unit tests to assert (Bill, string[]) tuple return - Update integration tests for new response structure (Bill + RawLines) - Fix exception message assertion in DevExpressSwissQrCodeProcessorTests - All 34 tests passing, 6 skipped (require real Swiss QR Bill PDFs)
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using System.Reflection;
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using DocumentOperator.Application.Common.Interfaces;
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using DocumentOperator.Domain.Common.Exceptions;
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using DocumentOperator.Domain.Exceptions;
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using DocumentOperator.Infrastructure.Services.QrCodeProcessing;
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using FluentAssertions;
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namespace DocumentOperator.Tests.Unit.Infrastructure.Services.QrCodeProcessing;
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/// <summary>
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/// Unit tests for DevExpressSwissQrCodeProcessor.
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/// Tests Swiss QR Code extraction and parsing from PDFs.
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/// </summary>
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public class DevExpressSwissQrCodeProcessorTests
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{
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private readonly ISwissQrCodeProcessor _sut; // SUT = System Under Test
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public DevExpressSwissQrCodeProcessorTests()
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{
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// Arrange: Create instance
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_sut = new DevExpressSwissQrCodeProcessor();
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}
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#region Helper Methods
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/// <summary>
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/// Loads a test PDF from embedded resources.
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/// </summary>
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/// <param name="filename">Name of the PDF file (e.g., "pdfWithSwissQRCode.pdf")</param>
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/// <returns>PDF content as byte array</returns>
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private static byte[] LoadTestPdf(string filename)
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{
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var assembly = Assembly.GetExecutingAssembly();
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var resourceName = $"DocumentOperator.Tests.TestData.Pdfs.{filename}";
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using var stream = assembly.GetManifestResourceStream(resourceName);
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if (stream == null)
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{
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throw new FileNotFoundException(
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$"Embedded resource '{resourceName}' not found. " +
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$"Available resources: {string.Join(", ", assembly.GetManifestResourceNames())}");
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}
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using var memoryStream = new MemoryStream();
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stream.CopyTo(memoryStream);
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return memoryStream.ToArray();
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}
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#endregion
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#region ExtractSwissQrCodeAsync Tests
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[Fact(Skip = "Current test PDF uses QR format not compatible with ZXing library. Requires real Swiss QR Bill PDF from https://www.swiss-qr-invoice.org/")]
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public async Task ExtractSwissQrCodeAsync_PdfWithSwissQrCode_ReturnsQrCodeData()
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{
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// Arrange
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byte[] pdfBytes = LoadTestPdf("pdfWithSwissQRCode.pdf");
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// Act
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var (bill, rawLines) = await _sut.ExtractSwissQrCodeAsync(pdfBytes);
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// Assert
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bill.Should().NotBeNull("PDF contains a Swiss QR Code");
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bill.Account.Should().NotBeNullOrEmpty("QR Code should contain IBAN");
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bill.Currency.Should().NotBeNullOrEmpty("QR Code should contain currency");
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bill.Creditor.Should().NotBeNull("QR Code should contain creditor");
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bill.Creditor.Name.Should().NotBeNullOrEmpty("QR Code should contain creditor name");
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rawLines.Should().NotBeEmpty("Raw lines should contain parsed QR code text");
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}
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[Fact(Skip = "Test PDF incompatible with ZXing - requires real Swiss QR Bill PDF")]
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public async Task ExtractSwissQrCodeAsync_PdfWithSwissQrCode_ReturnsValidIban()
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{
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// Arrange
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byte[] pdfBytes = LoadTestPdf("pdfWithSwissQRCode.pdf");
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// Act
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var (bill, _) = await _sut.ExtractSwissQrCodeAsync(pdfBytes);
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// Assert
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bill.Account.Should().MatchRegex(@"^CH\d{2}[A-Z0-9]{17}$",
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"Swiss IBAN should match pattern: CH + 2 digits + 17 chars");
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}
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[Fact(Skip = "Test PDF incompatible with ZXing - requires real Swiss QR Bill PDF")]
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public async Task ExtractSwissQrCodeAsync_PdfWithSwissQrCode_ReturnsCurrency()
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{
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// Arrange
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byte[] pdfBytes = LoadTestPdf("pdfWithSwissQRCode.pdf");
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// Act
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var (bill, _) = await _sut.ExtractSwissQrCodeAsync(pdfBytes);
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// Assert
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bill.Currency.Should().BeOneOf("CHF", "EUR",
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"Swiss QR Bill supports CHF and EUR currencies");
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}
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[Fact]
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public async Task ExtractSwissQrCodeAsync_PdfWithoutQrCode_ThrowsSwissQrCodeNotFoundException()
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{
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// Arrange: valid.pdf doesn't contain a Swiss QR Code
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byte[] pdfBytes = LoadTestPdf("valid.pdf");
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// Act & Assert
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var act = async () => await _sut.ExtractSwissQrCodeAsync(pdfBytes);
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await act.Should().ThrowAsync<SwissQrCodeNotFoundException>()
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.WithMessage("*No valid Swiss QR Code found*");
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}
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[Fact]
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public async Task ExtractSwissQrCodeAsync_EmptyPdf_ThrowsException()
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{
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// Arrange: Empty byte array
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byte[] emptyPdfBytes = [];
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// Act & Assert
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var act = async () => await _sut.ExtractSwissQrCodeAsync(emptyPdfBytes);
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await act.Should().ThrowAsync<Exception>()
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.Where(ex => ex is PdfProcessingException || ex is ArgumentException);
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}
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[Fact]
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public async Task ExtractSwissQrCodeAsync_NullInput_ThrowsArgumentNullException()
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{
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// Arrange
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byte[] nullPdfBytes = null!;
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// Act & Assert
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var act = async () => await _sut.ExtractSwissQrCodeAsync(nullPdfBytes);
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await act.Should().ThrowAsync<ArgumentNullException>()
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.WithParameterName("pdfBytes");
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}
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[Fact]
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public async Task ExtractSwissQrCodeAsync_InvalidPdfBytes_ThrowsPdfProcessingException()
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{
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// Arrange: Random bytes that are not a valid PDF
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byte[] invalidPdfBytes = "This is not a PDF file"u8.ToArray();
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// Act & Assert
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var act = async () => await _sut.ExtractSwissQrCodeAsync(invalidPdfBytes);
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await act.Should().ThrowAsync<PdfProcessingException>()
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.WithMessage("*Failed to extract Swiss QR Code*");
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}
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#endregion
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#region Swiss QR Code Content Validation Tests
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[Fact(Skip = "Test PDF incompatible with ZXing - requires real Swiss QR Bill PDF")]
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public async Task ExtractSwissQrCodeAsync_ValidQrCode_ParsesCreditorInformation()
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{
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// Arrange
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byte[] pdfBytes = LoadTestPdf("pdfWithSwissQRCode.pdf");
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// Act
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var (bill, _) = await _sut.ExtractSwissQrCodeAsync(pdfBytes);
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// Assert
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bill.Creditor.Should().NotBeNull("Creditor information is required");
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bill.Creditor.Name.Should().NotBeNullOrEmpty("Creditor name is required");
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// Swiss QR Bill allows optional address fields
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}
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[Fact(Skip = "Test PDF incompatible with ZXing - requires real Swiss QR Bill PDF")]
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public async Task ExtractSwissQrCodeAsync_ValidQrCode_ParsesDebtorInformationIfPresent()
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{
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// Arrange
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byte[] pdfBytes = LoadTestPdf("pdfWithSwissQRCode.pdf");
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// Act
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var (bill, _) = await _sut.ExtractSwissQrCodeAsync(pdfBytes);
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// Assert
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// Debtor information is OPTIONAL in Swiss QR Bill Standard 2.0
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// So we just check that the property exists (can be null)
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bill.Should().NotBeNull();
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// If debtor is present, it should have a name
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if (bill.Debtor != null)
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{
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bill.Debtor.Name.Should().NotBeNullOrWhiteSpace();
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}
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}
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[Fact(Skip = "Test PDF incompatible with ZXing - requires real Swiss QR Bill PDF")]
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public async Task ExtractSwissQrCodeAsync_ValidQrCode_ParsesAmountIfPresent()
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{
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// Arrange
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byte[] pdfBytes = LoadTestPdf("pdfWithSwissQRCode.pdf");
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// Act
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var (bill, _) = await _sut.ExtractSwissQrCodeAsync(pdfBytes);
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// Assert
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// Amount is OPTIONAL in Swiss QR Bill (can be 0.00 or null for payment slips)
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if (bill.Amount.HasValue)
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{
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bill.Amount.Value.Should().BeGreaterOrEqualTo(0.01m,
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"If amount is specified, it should be >= 0.01");
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}
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}
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#endregion
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}
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