Test PHP headers with PHPUnit

Question

I\'m trying to use PHPunit to test a class that outputs some custom headers.

The problem is that on my machine this:

Answer 1

As an aside: For me headers_list() kept returning 0 elements. I noticed @titel's comment on the question and figured it deserves special mention here:

Just wanted to cover this if there are some other people interested in this as well. headers_list() doesn't work while running PHPunit (which uses PHP CLI) but xdebug_get_headers() works instead.

HTH