link
Hi,
I am very new to elixir, so please forgive my choice of terminology, and if they don’t make sense. Please ask for more details if it can help.
I have a function using GenServer.cast, like below:
def write(some_server, value) do
GenServer.cast(some_server, {:write_value, value})
end
where:
def handle_cast({:write_value, value}, state) do
send_data(value)
{:noreply, state}
end
I call the “write” from another handle_cast:
def handle_cast({:something}, state) do
write(“test”)
{:noreply, state}
end
Now, how can I use assert_receive to verify the :write has happened in the second handle_cast (assuming I am sure the handle_cast is running)?
Thanks
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kokolegorille
I think :sys.get_state can help You in test by ensuring cast are executed…
Something like that…
You can look at Why is my test failing when I use cast?
gregvaughn
A little tangent to your question, but I’d consider a simple refactoring. Make the
somethinghandle_cast function callsend_datadirectly instead of calling the clientwritefunction. It’s unconventional for a genserver to call its own client functions. If you really need your genserver to send itself a message, then I’d prefer to see that more explicit so that thehandle_castforsomethingcallsGenServer.cast(self(), {:write_value, "test"}link
It is not its own client, it is in another GenServer (I am working on someone else’s project, why it is structured like this is another question)