RSpec: how to test Rails logger message expectations?

Question

I am trying to test that the Rails logger receives messages in some of my specs. I am using the Logging gem.

Let\'s say that I have a class like this:

Answer 1

Even I had very similar error:

Failure/Error: expect(Rails.logger).to receive(:info).with("some message")
       (#).info("some message")
           expected: 1 time with arguments: ("some message")
           received: 0 times

The below worked for me,

expect { my_method }.
            to output(/error messsage/).to_stdout_from_any_process

Reference: https://relishapp.com/rspec/rspec-expectations/docs/built-in-matchers/output-matcher