Question

In many of our classes we cache expensive operation for performance. e.g.

def self.foo
    @foo ||= get_foo
end 

This works great in the application, however the tests (RSpec) fail because of these memoized variables. The values from the first test are being returned in the subsequent tests, when we expect fresh values.

So the question is: how do I reload the class? Or remove all the memoized variables?

Answer 1

Build your classes and tests in such a way that the cached data remains correct or gets deleted when it is invalid. Consider adding a method to clear the cache and calling it in a rspec before block.