Multiple HTTP Request Headers with same Key

Problem Some services in our cluster sometimes receive multiple headers with same key, for example 2 Accept-Language headers with different values. Tracetest currently sends the header-key once, with the header-value of the last applied Header in Headers List. We want to test our handling of Field Order rules: https://httpwg.org/specs/rfc7230.html#rfc.section.3.2.2

Solution We would like a way to test how our services handle this type of request by:

1. Allowing sending of multiple headers with same key.
2. Allowing assertions on the count or entry of headers, in case there are multiple headers.

Considerations

Here are some considerations of how to specify assertions on count/entries:

# assert on count of specific header-key
  assertions:
  - count(http.request.header.accept_language) = 2
  - http.request.header.accept_language.count = 2

# assert on first/last header matching key - fails assertion when no header matches key, or entry of nth_child doesn't exist
  assertions:
  - http.request.header.accept_language:first = "["duplicate1"]"
  - http.request.header.accept_language:last = "["duplicate2"]"

# assert on nth_child - fails assertion when entry of nth_child doesn't exist
  assertions:
  - http.request.header.accept_language:nth_child(1) = "["duplicate1"]"
  - http.request.header.accept_language:nth_child(2) = "["duplicate2"]"

Additional context Tracetest UI currently doesn’t allow multiple headers with same key Add 2 headers:

Header is sent once, with the last value:

[abcl-trifork]

Hi @mathnogueira,

Appreciate the quick fix, will play around with duplicate header-values in v0.7.5.

We look forward to added assertions, environment variables and test suites in v0.8 - huge changes for automation and CI/CD pipelines!

[kdhamric]

@abcl-trifork Will inform you once 0.8 releases. Plan is a few weeks - we have to bring together several elements (variables, environments, transactions / chaining) - a bit of a more tightly coupled release than normal.

Let us know how the duplicate header fix works for you.