test: Add unit tests for DocumentService.Client
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199
DocumentOperator.Tests/Unit/Client/ZugferdClientTests.cs
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199
DocumentOperator.Tests/Unit/Client/ZugferdClientTests.cs
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using DocumentService.Client.Clients;
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using DocumentService.Client.Interfaces;
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using FluentAssertions;
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using Microsoft.Extensions.Logging.Abstractions;
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using System.Net;
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using System.Net.Http;
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using System.Text.Json;
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namespace DocumentService.Tests.Unit.Client;
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/// <summary>
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/// Unit tests for <see cref="ZugferdClient"/>.
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/// All tests use a fake <see cref="MockHttpMessageHandler"/> — no real HTTP calls are made.
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/// </summary>
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public class ZugferdClientTests
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{
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// ?? helpers ?????????????????????????????????????????????????????????????
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private static (ZugferdClient client, MockHttpMessageHandler handler) BuildJson<T>(T body)
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{
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var handler = MockHttpMessageHandler.ReturningJson(body);
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var httpClient = new HttpClient(handler) { BaseAddress = new Uri("http://localhost") };
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var client = new ZugferdClient(httpClient, NullLogger<ZugferdClient>.Instance);
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return (client, handler);
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}
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private static (ZugferdClient client, MockHttpMessageHandler handler) BuildBytes(byte[] bytes, string mediaType = "application/xml")
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{
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var handler = MockHttpMessageHandler.ReturningBytes(bytes, mediaType);
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var httpClient = new HttpClient(handler) { BaseAddress = new Uri("http://localhost") };
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var client = new ZugferdClient(httpClient, NullLogger<ZugferdClient>.Instance);
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return (client, handler);
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}
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private static byte[] FakePdfBytes() => "fake-pdf-content"u8.ToArray();
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private static byte[] FakeXmlBytes() => "<invoice>test</invoice>"u8.ToArray();
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// ?? HasZugferdAsync (Stream) ?????????????????????????????????????????????
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[Fact]
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public async Task HasZugferdAsync_Stream_WhenZugferdPresent_ReturnsTrue()
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{
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// Arrange
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var expected = new ZugferdCheckResult { HasZugferd = true, Version = "2.1", Profile = "EN 16931" };
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var (client, handler) = BuildJson(expected);
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// Act
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var result = await client.HasZugferdAsync(new MemoryStream(FakePdfBytes()));
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// Assert
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result.HasZugferd.Should().BeTrue();
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result.Version.Should().Be("2.1");
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result.Profile.Should().Be("EN 16931");
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handler.LastRequest!.RequestUri!.PathAndQuery.Should().Be("/api/pdf/zugferd/has-zugferd");
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handler.LastRequest.Content.Should().BeOfType<MultipartFormDataContent>();
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}
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[Fact]
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public async Task HasZugferdAsync_Stream_WhenNoZugferd_ReturnsFalse()
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{
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// Arrange
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var expected = new ZugferdCheckResult { HasZugferd = false };
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var (client, _) = BuildJson(expected);
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// Act
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var result = await client.HasZugferdAsync(new MemoryStream(FakePdfBytes()));
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// Assert
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result.HasZugferd.Should().BeFalse();
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result.Version.Should().BeNull();
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}
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// ?? HasZugferdAsync (byte[]) ?????????????????????????????????????????????
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[Fact]
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public async Task HasZugferdAsync_Bytes_SendsJsonWithBase64()
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{
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// Arrange
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var expected = new ZugferdCheckResult { HasZugferd = true };
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var (client, handler) = BuildJson(expected);
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// Act
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await client.HasZugferdAsync(FakePdfBytes());
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// Assert
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handler.LastRequest!.Content.Should().NotBeNull();
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handler.LastRequest.Content!.Headers.ContentType!.MediaType.Should().Be("application/json");
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var body = await handler.LastRequest.Content!.ReadAsStringAsync();
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var doc = JsonDocument.Parse(body);
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doc.RootElement.GetProperty("base64Pdf").GetString().Should().NotBeNullOrEmpty();
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}
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// ?? ExtractZugferdAsync (Stream) — raw XML stream ?????????????????????????
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[Fact]
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public async Task ExtractZugferdAsync_Stream_SendsMultipartWithAsFileTrue()
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{
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// Arrange
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var (client, handler) = BuildBytes(FakeXmlBytes());
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// Act
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using var result = await client.ExtractZugferdAsync(new MemoryStream(FakePdfBytes()));
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// Assert
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result.Should().NotBeNull();
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handler.LastRequest!.RequestUri!.PathAndQuery.Should().Be("/api/pdf/zugferd/extract?asFile=true");
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handler.LastRequest.Content.Should().BeOfType<MultipartFormDataContent>();
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}
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[Fact]
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public async Task ExtractZugferdAsync_Stream_ReturnsXmlContent()
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{
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// Arrange
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var xmlBytes = "<root><invoice/></root>"u8.ToArray();
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var (client, _) = BuildBytes(xmlBytes);
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// Act
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using var result = await client.ExtractZugferdAsync(new MemoryStream(FakePdfBytes()));
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var content = await new StreamReader(result).ReadToEndAsync();
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// Assert
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content.Should().Be("<root><invoice/></root>");
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}
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// ?? ExtractZugferdAsync (byte[]) ?????????????????????????????????????????
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[Fact]
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public async Task ExtractZugferdAsync_Bytes_SendsJsonWithFormatFile()
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{
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// Arrange
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var (client, handler) = BuildBytes(FakeXmlBytes());
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// Act
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using var result = await client.ExtractZugferdAsync(FakePdfBytes());
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// Assert
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handler.LastRequest!.RequestUri!.PathAndQuery.Should().Be("/api/pdf/zugferd/extract?format=file");
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handler.LastRequest.Content.Should().NotBeNull();
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handler.LastRequest.Content!.Headers.ContentType!.MediaType.Should().Be("application/json");
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}
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// ?? ExtractZugferdAsResultAsync (Stream) ?????????????????????????????????
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[Fact]
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public async Task ExtractZugferdAsResultAsync_Stream_ReturnsStructuredResult()
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{
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// Arrange
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var expected = new ZugferdExtractionResult
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{
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FileName = "factur-x.xml",
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XmlContent = "<invoice/>",
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Version = "2.1",
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Profile = "EN 16931"
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};
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var (client, handler) = BuildJson(expected);
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// Act
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var result = await client.ExtractZugferdAsResultAsync(new MemoryStream(FakePdfBytes()));
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// Assert
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result.FileName.Should().Be("factur-x.xml");
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result.XmlContent.Should().Be("<invoice/>");
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result.Version.Should().Be("2.1");
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handler.LastRequest!.RequestUri!.PathAndQuery.Should().Be("/api/pdf/zugferd/extract?asFile=false");
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}
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// ?? ExtractZugferdAsResultAsync (byte[]) ?????????????????????????????????
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[Fact]
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public async Task ExtractZugferdAsResultAsync_Bytes_SendsJsonWithFormatJson()
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{
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// Arrange
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var expected = new ZugferdExtractionResult { FileName = "zugferd.xml", XmlContent = "<x/>" };
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var (client, handler) = BuildJson(expected);
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// Act
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await client.ExtractZugferdAsResultAsync(FakePdfBytes());
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// Assert
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handler.LastRequest!.RequestUri!.PathAndQuery.Should().Be("/api/pdf/zugferd/extract?format=json");
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handler.LastRequest.Content.Should().NotBeNull();
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handler.LastRequest.Content!.Headers.ContentType!.MediaType.Should().Be("application/json");
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}
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// ?? HTTP error propagation ???????????????????????????????????????????????
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[Fact]
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public async Task HasZugferdAsync_WhenApiReturns400_ThrowsHttpRequestException()
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{
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// Arrange
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var handler = MockHttpMessageHandler.ReturningStatus(HttpStatusCode.BadRequest);
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var httpClient = new HttpClient(handler) { BaseAddress = new Uri("http://localhost") };
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var client = new ZugferdClient(httpClient, NullLogger<ZugferdClient>.Instance);
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// Act & Assert
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await client.Invoking(c => c.HasZugferdAsync(new MemoryStream(FakePdfBytes())))
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.Should().ThrowAsync<HttpRequestException>();
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}
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}
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