Question

I’m trying to test some code that I’ve written to respond to the onopen, onmessage, and onclose events that can be registered via EventMachine::WebSocket, and I’m curious to know if there are any utilities that could help mock out some of the EventMachine functionality for unit tests. Links to example em-websocket tests would be greatly appreciated; I’ve looked all over to find example tests, but to no avail.

Answer 1

Have you tried to mock the Websocket::Connection instance yourself? I would start by setting up a an object with a send method?

For example:

class ConnectionMock
  def send(msg)
  end
end

then create an instance of that to represent the typical ws instance used in the em-websocket documentation. The onmessage is the only event which passes an argument, which is a string, so there’s not much need to mock much else for these events. I would start with this base object and mock more methods as needed.

Here’s an example of a EM-Websocket mock from Socky.