In some of my unit tests, I find the need to set today to a different
value than the actual today. For example, to test the model method
“balance_of_today”, which takes no argument, I want to have Date.today
be a specific date for the purpose of testing. In other words, I want
to do something like this:
mock_today(Date.new(2008, 2, 1)) do
… test code…
My implementation for mock_today is:
$_mock_test_date = date
Date.class_eval do class <<self alias original_today today end def self.today $_mock_test_date end end yield Date.class_eval do class <<self alias today original_today end end
So my questions are:
Is it a good idea to mock Date.today?
Can my implementation of mock_today be improved? I’m particularly
worried about of the use of global variable, and of class_eval, since
I heard class_eval is becoming outdated as Ruby 1.9 is coming out.