Test retries with toxiproxy

[JonGerding]

Hi,
i would like to test the retry function of my application which sends up to three HTTP-requests to an external API if it didn't get a response.
Is it possible to implement a function to toxiproxy that it discard the first two requests or a function that toxiproxy discard all requests in a specific period of time x and continues after that.

[miry]

It is not possible in current state. Toxiproxy is only TCP proxy.
There are still some old PRs that would partially allow to support HTTP protocol.

There is a good discussion in #215.
There are some suggestion to use https://designer.mocky.io/ or similar.

[ccoltx]

Does that mean we can test grpc retry using toxiproxy? It uses TCP

[miry]

@ccoltx Toxiproxy does not know about content of high level protocol.

There are solutions:

1. Use toxiproxy client in test to test on Networking level. Example:

Toxiproxy[grpc_server].down do
  GRPC.call # -> Failed with networking problem
  GRPC.call # -> Failed with networking problem
end

GRPC.call # -> Success to setup conneciton and process the request.

2. Create a new Toxic grpc, that would process incoming requests and do some problems.
   Example: https://github.com/Shopify/toxiproxy/blob/master/_examples/toxics/http_toxic.go