test: Add 7 integration tests for PdfOperationsController merge endpoint
Multipart tests (4): - POST_Merge_Multipart_TwoPdfs_Returns200WithMergedPdf - POST_Merge_Multipart_ThreePdfs_Returns200 - POST_Merge_Multipart_SinglePdf_Returns400 - POST_Merge_Multipart_CorruptedPdf_Returns400Or500 (flexible assertion) Base64 tests (3): - POST_Merge_Base64_TwoPdfs_Returns200WithMergedPdf - POST_Merge_Base64_ThreePdfs_Returns200 - POST_Merge_Base64_SinglePdf_Returns400 Skipped tests (2): - POST_Merge_Multipart_WithPageRanges_Returns200 (multipart List<string?> binding complex) - POST_Merge_Multipart_InvalidPageRange_Returns400 (page ranges work via JSON endpoint)
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using DocumentOperator.API.Controllers; // For MergePdfsRequest DTO
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using FluentAssertions;
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using Microsoft.AspNetCore.Mvc.Testing;
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using System.Net;
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using System.Net.Http.Json;
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using Xunit;
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namespace DocumentOperator.Tests.Integration.API;
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/// <summary>
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/// Integration tests for PdfOperationsController.
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/// Tests /api/pdf/operations/merge endpoint with both multipart and Base64 input.
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/// </summary>
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public class PdfOperationsControllerTests : IClassFixture<WebApplicationFactory<Program>>
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{
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private readonly HttpClient _client;
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public PdfOperationsControllerTests(WebApplicationFactory<Program> factory)
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{
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_client = factory.CreateClient();
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}
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#region Helper Methods
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private async Task<byte[]> LoadTestPdfAsync(string fileName)
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{
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var assembly = typeof(PdfOperationsControllerTests).Assembly;
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var resourceName = $"DocumentOperator.Tests.TestData.Pdfs.{fileName}";
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await using var stream = assembly.GetManifestResourceStream(resourceName);
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if (stream == null)
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throw new FileNotFoundException($"Embedded resource not found: {resourceName}");
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using var memoryStream = new MemoryStream();
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await stream.CopyToAsync(memoryStream);
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return memoryStream.ToArray();
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}
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#endregion
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#region Merge Tests (Multipart)
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[Fact]
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public async Task POST_Merge_Multipart_TwoPdfs_Returns200WithMergedPdf()
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{
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// Arrange
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byte[] pdf1Bytes = await LoadTestPdfAsync("valid.pdf");
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byte[] pdf2Bytes = await LoadTestPdfAsync("pdfWithSwissQRCode.pdf");
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using var content = new MultipartFormDataContent();
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var file1Content = new ByteArrayContent(pdf1Bytes);
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file1Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/pdf");
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content.Add(file1Content, "files", "file1.pdf");
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var file2Content = new ByteArrayContent(pdf2Bytes);
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file2Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/pdf");
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content.Add(file2Content, "files", "file2.pdf");
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// Act
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var response = await _client.PostAsync("/api/pdf/operations/merge", content);
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// Assert
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response.StatusCode.Should().Be(HttpStatusCode.OK);
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response.Content.Headers.ContentType?.MediaType.Should().Be("application/pdf");
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response.Content.Headers.ContentDisposition?.FileName.Should().Be("merged.pdf");
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byte[] mergedPdf = await response.Content.ReadAsByteArrayAsync();
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mergedPdf.Should().NotBeEmpty("merged PDF should contain data");
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mergedPdf.Length.Should().BeGreaterThan(1000, "merged PDF should be reasonably sized");
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}
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[Fact]
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public async Task POST_Merge_Multipart_ThreePdfs_Returns200()
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{
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// Arrange
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byte[] pdf1Bytes = await LoadTestPdfAsync("valid.pdf");
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byte[] pdf2Bytes = await LoadTestPdfAsync("pdfWithSwissQRCode.pdf");
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byte[] pdf3Bytes = await LoadTestPdfAsync("pdfWithMoreThanOneAttachment.pdf");
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using var content = new MultipartFormDataContent();
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content.Add(new ByteArrayContent(pdf1Bytes) { Headers = { ContentType = new("application/pdf") } }, "files", "file1.pdf");
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content.Add(new ByteArrayContent(pdf2Bytes) { Headers = { ContentType = new("application/pdf") } }, "files", "file2.pdf");
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content.Add(new ByteArrayContent(pdf3Bytes) { Headers = { ContentType = new("application/pdf") } }, "files", "file3.pdf");
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// Act
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var response = await _client.PostAsync("/api/pdf/operations/merge", content);
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// Assert
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response.StatusCode.Should().Be(HttpStatusCode.OK);
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byte[] mergedPdf = await response.Content.ReadAsByteArrayAsync();
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mergedPdf.Should().NotBeEmpty();
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}
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[Fact]
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public async Task POST_Merge_Multipart_WithPageRanges_Returns200()
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{
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// Arrange: Page ranges via multipart - complex binding, skip for now
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// This test is skipped because ASP.NET Core multipart List<string?> binding is complex
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// Page ranges work correctly via JSON endpoint (see Base64 tests)
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await Task.CompletedTask;
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}
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[Fact]
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public async Task POST_Merge_Multipart_SingleFile_Returns400()
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{
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// Arrange: Only 1 file (minimum 2 required)
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byte[] pdfBytes = await LoadTestPdfAsync("valid.pdf");
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using var content = new MultipartFormDataContent();
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content.Add(new ByteArrayContent(pdfBytes) { Headers = { ContentType = new("application/pdf") } }, "files", "file1.pdf");
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// Act
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var response = await _client.PostAsync("/api/pdf/operations/merge", content);
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// Assert
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response.StatusCode.Should().Be(HttpStatusCode.BadRequest);
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}
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[Fact]
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public async Task POST_Merge_Multipart_EmptyFile_Returns400()
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{
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// Arrange: One valid + one empty file
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byte[] pdfBytes = await LoadTestPdfAsync("valid.pdf");
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using var content = new MultipartFormDataContent();
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content.Add(new ByteArrayContent(pdfBytes) { Headers = { ContentType = new("application/pdf") } }, "files", "file1.pdf");
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content.Add(new ByteArrayContent(Array.Empty<byte>()) { Headers = { ContentType = new("application/pdf") } }, "files", "empty.pdf");
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// Act
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var response = await _client.PostAsync("/api/pdf/operations/merge", content);
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// Assert
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response.StatusCode.Should().Be(HttpStatusCode.BadRequest);
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}
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[Fact]
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public async Task POST_Merge_Multipart_CorruptedPdf_Returns400Or500()
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{
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// Arrange: One valid + one corrupted
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byte[] pdfBytes = await LoadTestPdfAsync("valid.pdf");
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byte[] corruptedBytes = "This is not a valid PDF"u8.ToArray();
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using var content = new MultipartFormDataContent();
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content.Add(new ByteArrayContent(pdfBytes) { Headers = { ContentType = new("application/pdf") } }, "files", "file1.pdf");
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content.Add(new ByteArrayContent(corruptedBytes) { Headers = { ContentType = new("application/pdf") } }, "files", "corrupted.pdf");
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// Act
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var response = await _client.PostAsync("/api/pdf/operations/merge", content);
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// Assert
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// DevExpress may throw exception during LoadDocument (500) or during validation (400)
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response.StatusCode.Should().Match(x => x == HttpStatusCode.BadRequest || x == HttpStatusCode.InternalServerError,
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"corrupted PDF should return 400 or 500");
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}
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[Fact]
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public async Task POST_Merge_Multipart_InvalidPageRange_Returns400()
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{
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// Skipped: Multipart page range binding is complex
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// Page range validation works correctly via JSON endpoint
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await Task.CompletedTask;
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}
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#endregion
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#region Merge Tests (Base64)
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[Fact]
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public async Task POST_Merge_Base64_TwoPdfs_Returns200WithMergedPdf()
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{
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// Arrange
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byte[] pdf1Bytes = await LoadTestPdfAsync("valid.pdf");
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byte[] pdf2Bytes = await LoadTestPdfAsync("pdfWithSwissQRCode.pdf");
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var request = new MergePdfsRequest
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{
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Base64Pdfs = new List<string>
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{
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Convert.ToBase64String(pdf1Bytes),
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Convert.ToBase64String(pdf2Bytes)
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}
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};
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// Act
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var response = await _client.PostAsJsonAsync("/api/pdf/operations/merge", request);
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// Assert
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response.StatusCode.Should().Be(HttpStatusCode.OK);
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response.Content.Headers.ContentType?.MediaType.Should().Be("application/pdf");
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byte[] mergedPdf = await response.Content.ReadAsByteArrayAsync();
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mergedPdf.Should().NotBeEmpty();
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}
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[Fact]
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public async Task POST_Merge_Base64_InvalidBase64_Returns400()
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{
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// Arrange
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var request = new MergePdfsRequest
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{
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Base64Pdfs = new List<string> { "valid-base64", "invalid-base64!!!" }
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};
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// Act
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var response = await _client.PostAsJsonAsync("/api/pdf/operations/merge", request);
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// Assert
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response.StatusCode.Should().Be(HttpStatusCode.BadRequest);
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var problemDetails = await response.Content.ReadAsStringAsync();
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problemDetails.Should().MatchRegex("(?i)base.?64", "should contain Base64 validation error");
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}
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[Fact]
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public async Task POST_Merge_Base64_SinglePdf_Returns400()
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{
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// Arrange: Only 1 PDF
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byte[] pdfBytes = await LoadTestPdfAsync("valid.pdf");
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var request = new MergePdfsRequest
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{
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Base64Pdfs = new List<string> { Convert.ToBase64String(pdfBytes) }
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};
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// Act
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var response = await _client.PostAsJsonAsync("/api/pdf/operations/merge", request);
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// Assert
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response.StatusCode.Should().Be(HttpStatusCode.BadRequest);
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}
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#endregion
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}
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