test: add Application handler tests for all missing features

New test files (4 tests each — 2 success + 2 failure): - MergePdfsCommandHandlerTests: TwoStreams, WithPageRanges, BadRequest, GenericException - AddAnnotationHandlerTests: TextMarkup, FreeText, BadRequest (page OOB), GenericException - AddStampHandlerTests: TextStamp, PredefinedStamp, BadRequest (opacity), GenericException - ExtractPdfAttachmentsHandlerTests: ReturnsZip, NotFoundException, BadRequest, GenericException - ConvertPdfAHandlerTests (ConvertTo + ConvertFrom): ConvertTo: ValidLevel, NotImplemented, BadRequest ConvertFrom: ValidPdfA, BadRequest, GenericException
2026-08-28 11:46:18 +02:00
parent 9040aed1da
commit fbaefe1fd2
5 changed files with 555 additions and 0 deletions
--- a/DocumentOperator.Tests/Unit/Application/Features/ExtractAttachments/ExtractPdfAttachmentsHandlerTests.cs
+++ b/DocumentOperator.Tests/Unit/Application/Features/ExtractAttachments/ExtractPdfAttachmentsHandlerTests.cs
@@ -0,0 +1,80 @@
+using DocumentService.Application.Common.Interfaces;
+using DocumentService.Application.ExtractPdfAttachments;
+using DocumentService.Domain.Common.Exceptions;
+using FluentAssertions;
+using Moq;
+using Xunit;
+
+namespace DocumentService.Tests.Unit.Application.Features.ExtractAttachments;
+
+public class ExtractPdfAttachmentsHandlerTests
+{
+    private readonly Mock<IPdfProcessor> _mockProcessor;
+    private readonly ExtractPdfAttachmentsCommandHandler _handler;
+    private static readonly byte[] FakePdfBytes = "%PDF"u8.ToArray();
+
+    public ExtractPdfAttachmentsHandlerTests()
+    {
+        _mockProcessor = new Mock<IPdfProcessor>();
+        _handler = new ExtractPdfAttachmentsCommandHandler(_mockProcessor.Object);
+    }
+
+    [Fact]
+    public async Task Handle_PdfWithAttachments_ReturnsZipBytes()
+    {
+        // Arrange
+        var command = new ExtractPdfAttachmentsCommand { PdfStream = new MemoryStream(FakePdfBytes) };
+        // ZIP magic bytes PK
+        var expected = new byte[] { 0x50, 0x4B, 0x03, 0x04, 0x00, 0x00 };
+        _mockProcessor.Setup(x => x.ExtractAttachmentsAsync(It.IsAny<Stream>())).ReturnsAsync(expected);
+
+        // Act
+        var result = await _handler.Handle(command, CancellationToken.None);
+
+        // Assert
+        result.Should().NotBeEmpty();
+        result[0].Should().Be(0x50, "ZIP starts with 'P'");
+        result[1].Should().Be(0x4B, "ZIP continues with 'K'");
+        _mockProcessor.Verify(x => x.ExtractAttachmentsAsync(It.IsAny<Stream>()), Times.Once);
+    }
+
+    [Fact]
+    public async Task Handle_PdfWithNoAttachments_ThrowsNotFoundException()
+    {
+        // Arrange
+        var command = new ExtractPdfAttachmentsCommand { PdfStream = new MemoryStream(FakePdfBytes) };
+        _mockProcessor.Setup(x => x.ExtractAttachmentsAsync(It.IsAny<Stream>()))
+            .ThrowsAsync(new NotFoundException("PDF does not contain any attachments"));
+
+        // Act & Assert
+        var ex = await Assert.ThrowsAsync<NotFoundException>(
+            () => _handler.Handle(command, CancellationToken.None));
+        ex.Message.Should().Contain("attachments");
+    }
+
+    [Fact]
+    public async Task Handle_EmptyStream_ThrowsBadRequestException()
+    {
+        // Arrange
+        var command = new ExtractPdfAttachmentsCommand { PdfStream = new MemoryStream(FakePdfBytes) };
+        _mockProcessor.Setup(x => x.ExtractAttachmentsAsync(It.IsAny<Stream>()))
+            .ThrowsAsync(new BadRequestException("PDF stream cannot be empty"));
+
+        // Act & Assert
+        var ex = await Assert.ThrowsAsync<BadRequestException>(
+            () => _handler.Handle(command, CancellationToken.None));
+        ex.Message.Should().Contain("empty");
+    }
+
+    [Fact]
+    public async Task Handle_ProcessorThrowsGenericException_PropagatesException()
+    {
+        // Arrange
+        var command = new ExtractPdfAttachmentsCommand { PdfStream = new MemoryStream(FakePdfBytes) };
+        _mockProcessor.Setup(x => x.ExtractAttachmentsAsync(It.IsAny<Stream>()))
+            .ThrowsAsync(new Exception("Unexpected error"));
+
+        // Act & Assert
+        await Assert.ThrowsAsync<Exception>(() => _handler.Handle(command, CancellationToken.None));
+    }
+}