TrailingHeaders_RemoteServer_Test.cs

[ConditionalFact(nameof(OsSupportsWinHttpTrailingHeaders))]
public async Task Http2GetAsyncResponseHeadersReadOption_RemoteServer_TrailingHeaders_Available()
{
    Uri address = new Uri("https://localhost:5001/trailers.ashx");
    using (HttpClient client = CreateHttpClient())
    {
        Task<HttpResponseMessage> sendTask = client.GetAsync(address, HttpCompletionOption.ResponseHeadersRead);

        HttpResponseMessage response = await sendTask;
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);

        Stream stream = await response.Content.ReadAsStreamAsync(TestAsync);
        byte[] data = new byte[100];
        await stream.ReadAsync(data, 0, data.Length);

        // Read data until EOF is reached
        while (stream.Read(data, 0, data.Length) != 0) ;

        var trailingHeaders = GetTrailingHeaders(response);

        // "EmptyHeader" is missing with remote server, aspnet probably ignores it.
        Assert.Equal(3, trailingHeaders.Count());
        Assert.Contains("amazingtrailer", trailingHeaders.GetValues("MyCoolTrailerHeader"));
        Assert.Contains("World", trailingHeaders.GetValues("Hello"));

        // Read when already zero. Trailers shouldn't be changed.
        stream.Read(data, 0, data.Length);

        trailingHeaders = GetTrailingHeaders(response);
        Assert.Equal(3, trailingHeaders.Count());
    }
}