What is the best way to write specs for code that depends on environment variables?

I am testing some code that pulls its configuration from environment variables (set by Heroku config vars in production, for local development I use foreman). What's the best way to test this kind of code with RSpec? I came up with this: before :each do ENV.stub(:[]).with("AWS_ACCESS_KEY_ID").and_return("asdf") ENV.stub(:[]).with("AWS_SECRET_ACCESS_KEY").and_return("secret") end If you don't need

[dtan4]

環境変数スタブ化するやつ