Dynamically add a constant value to a Ruby instance

Question

I'm testing a module (Foo::Api::Utility) by creating a dummy instance. The module references a constant that has been defined by the class that includes it (self.class::BASE_URL).

I'd like to be able to access this value and set it.

This doesn't work:

before(:each) do
  @utility = Object.new
  @utility.extend(Foo::Api::Utility)
  @utility.const_set('BASE_URL','https://domain.tld/api/v1')
end

What's the correct way to do this?

Answer 1

What about:

before(:each) do
  @utility_class = Class.new
  @utility_class.include(Foo::Api::Utility)
  @utility_class.const_set('BASE_URL','https://domain.tld/api/v1')
  @utility = @utility_class.new
end

---

Or, in more succinct manner:

before(:each) do
  @utility =
    Class.new do
      include Foo::Api::Utility
      const_set :BASE_URL,'https://domain.tld/api/v1'
    end.new
end