CSharpFunctionalExtensions.HttpResults/CSharpFunctionalExtensions.HttpResults.Tests/ResultExtensions/ToFileStreamHttpResultStreamE.cs at 8aca180e17bb04eaf22bfd12a88baec6eb066010 · co-IT/CSharpFunctionalExtensions.HttpResults · GitHub

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using System.Net.Mime;
using CSharpFunctionalExtensions.HttpResults.Tests.Shared;
using FluentAssertions;
using Microsoft.AspNetCore.Http.HttpResults;
using Microsoft.Net.Http.Headers;

namespace CSharpFunctionalExtensions.HttpResults.Tests.ResultExtensions;

public class ToFileStreamHttpResultStreamE
{
  [Fact]
  public void ResultStreamE_Success_can_be_mapped_to_FileStreamHttpResult()
  {
    var value = "foo"u8.ToArray();
    using var sourceStream = new MemoryStream();
    sourceStream.Write(value);
    var contentType = MediaTypeNames.Text.Plain;
    var fileDownloadName = "foo.txt";
    var lastModified = DateTimeOffset.Now;
    var entityTag = new EntityTagHeaderValue("\"fooETag\"");
    var enableRangeProcessing = true;

    var result =
      Result
        .Success<Stream, DocumentMissingError>(sourceStream)
        .ToFileStreamHttpResult(contentType, fileDownloadName, lastModified, entityTag, enableRangeProcessing)
        .Result as FileStreamHttpResult;

    using var resultStream = new MemoryStream();
    result!.FileStream.Position = 0;
    result!.FileStream.CopyTo(resultStream);
    resultStream.ToArray().Should().BeEquivalentTo(value);
    result!.LastModified.Should().Be(lastModified);
    result!.FileDownloadName.Should().Be(fileDownloadName);
    result!.FileLength.Should().Be(value.Length);
    result!.ContentType.Should().Be(contentType);
    result!.EnableRangeProcessing.Should().Be(enableRangeProcessing);
    result!.EntityTag.Should().Be(entityTag);
  }

  [Fact]
  public async Task ResultStreamE_Success_can_be_mapped_to_FileStreamHttpResult_Async()
  {
    var value = "foo"u8.ToArray();
    await using var sourceStream = new MemoryStream();
    sourceStream.Write(value);
    var contentType = MediaTypeNames.Text.Plain;
    var fileDownloadName = "foo.txt";
    var lastModified = DateTimeOffset.Now;
    var entityTag = new EntityTagHeaderValue("\"fooETag\"");
    var enableRangeProcessing = true;

    var result =
      (
        await Task.FromResult(Result.Success<Stream, DocumentMissingError>(sourceStream))
          .ToFileStreamHttpResult(contentType, fileDownloadName, lastModified, entityTag, enableRangeProcessing)
      ).Result as FileStreamHttpResult;

    await using var resultStream = new MemoryStream();
    result!.FileStream.Position = 0;
    await result!.FileStream.CopyToAsync(resultStream);
    resultStream.ToArray().Should().BeEquivalentTo(value);
    result!.LastModified.Should().Be(lastModified);
    result!.FileDownloadName.Should().Be(fileDownloadName);
    result!.FileLength.Should().Be(value.Length);
    result!.ContentType.Should().Be(contentType);
    result!.EnableRangeProcessing.Should().Be(enableRangeProcessing);
    result!.EntityTag.Should().Be(entityTag);
  }

  [Fact]
  public void ResultStreamE_Failure_can_be_mapped_to_FileStreamHttpResult()
  {
    var error = new DocumentMissingError { DocumentId = Guid.NewGuid().ToString() };

    var result =
      Result.Failure<Stream, DocumentMissingError>(error).ToFileStreamHttpResult().Result as NotFound<string>;

    result!.StatusCode.Should().Be(404);
    result!.Value.Should().Be(error.DocumentId);
  }

  [Fact]
  public async Task ResultStreamE_Failure_can_be_mapped_to_FileStreamHttpResult_Async()
  {
    var error = new DocumentMissingError { DocumentId = Guid.NewGuid().ToString() };

    var result =
      (await Task.FromResult(Result.Failure<Stream, DocumentMissingError>(error)).ToFileStreamHttpResult()).Result
      as NotFound<string>;

    result!.StatusCode.Should().Be(404);
    result!.Value.Should().Be(error.DocumentId);
  }
}