Ever that kind of error when trying to use HttpMock to test your ActiveResource client code ?

I got that error, and for hours couldnt figure out why. I have followed the tests in the library (such as test/base_test.rb):

ActiveResource::HttpMock.respond_to do |mock|
mock.get “/people/1.xml”, {}, @somexml
…

Well, it turns out that I need to set .site = “http://localhost” on the ActiveResource class I’m using!

Hope this helps anyone who experience the same problem as mine.