Event Stream Stubbing

[alextwoods]

Implement Event Stream Stubbing.

Adds support for stubbing for event streams. Interface:

client.stub_responses(
    :event_stream_operation,
    {
        events: [
            Types::ChatEvent.new(message: 'message'),
            {message: Message.new(headers: {}, payload: 'somedata')}
        ], 
        initial_response: {initial_structure: {message: 'data'}}}
    },
    {
        error: Hearth::NetworkingError # an error in initial request, no events are sent
    }
)

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[mullermp]

Nice! I probably missed a bunch, but I trust the test coverage.

[mullermp]

Why do you need const_get here?

[alextwoods]

This is how the module is intended to work from codegen - similar to the way we do an error module.

The specific encoding of messages is protocol specific (all existing ones currently use this same logic, but its supposed to be configurable in codegen per protocol) - so the protocol itself defines just a module to use and that module is expected to porovide a MessageEncoder and a MessageDecoder.

[mullermp]

Is there a true example here?

[alextwoods]

Not for rails json - I don't think it really makes sense to try to add.

But theres good examples in white label with this.

[mullermp]

Wonky formatting on all of these.

[alextwoods]

ugh, rubocop kept mucking these up. I think I've fixed them all.

[mullermp]

Should there be a named key for this? Or is metadata fine?