Mock IHttpContextAccessor in Unit Tests

Question

I have a method to get header value using IHttpContextAccessor

public class HeaderConfiguration : IHeaderConfiguration
{
    public HeaderConfig         


        

Answer 1

In my scenario I had to mock IHttpContextAccessor and access the inner request url bits.
I'm sharing it here because I spent a decent amount of time figuring this out and hopefully it'll help someone.

readonly Mock _HttpContextAccessor = 
  new Mock(MockBehavior.Strict);

void SetupHttpContextAccessorWithUrl(string currentUrl)
{
  var httpContext = new DefaultHttpContext();
  setRequestUrl(httpContext.Request, currentUrl);

  _HttpContextAccessor
    .SetupGet(accessor => accessor.HttpContext)
    .Returns(httpContext);

  static void setRequestUrl(HttpRequest httpRequest, string url)
  {
    UriHelper
      .FromAbsolute(url, out var scheme, out var host, out var path, out var query, 
        fragment: out var _);

    httpRequest.Scheme = scheme;
    httpRequest.Host = host;
    httpRequest.Path = path;
    httpRequest.QueryString = query;
  }
}