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using System.Text;
using VersOne.Epub.Environment;
namespace VersOne.Epub.Test.Unit.Mocks
{
internal class TestContentDownloader : IContentDownloader
{
private readonly Dictionary<string, byte[]> remoteFiles;
private readonly Dictionary<string, Stream> streams;
public TestContentDownloader()
{
remoteFiles = new Dictionary<string, byte[]>();
streams = new Dictionary<string, Stream>();
LastUserAgent = null;
}
public TestContentDownloader(string url, string textContent)
: this()
{
AddTextRemoteFile(url, textContent);
}
public TestContentDownloader(string url, byte[] byteContent)
: this()
{
AddByteRemoteFile(url, byteContent);
}
public TestContentDownloader(string url, Stream stream)
: this()
{
AddStream(url, stream);
}
public string? LastUserAgent { get; private set; }
public void AddTextRemoteFile(string url, string content)
{
remoteFiles.Add(url, Encoding.UTF8.GetBytes(content));
}
public void AddByteRemoteFile(string url, byte[] content)
{
remoteFiles.Add(url, content);
}
public void AddStream(string url, Stream stream)
{
streams.Add(url, stream);
}
public Task<Stream> DownloadAsync(string url, string userAgent)
{
LastUserAgent = userAgent;
Stream? result;
if (remoteFiles.TryGetValue(url, out byte[]? fileContent))
{
result = new MemoryStream(fileContent);
}
else if (!streams.TryGetValue(url, out result))
{
throw new Exception("File not found.");
}
return Task.FromResult(result);
}
}
}
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