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Using Time Travel To Unit Test Time-based Data
Searching for a way to test time-based data in ruby, I came across an excellent suggestion from Rick Olson (technoweenie). I've cleaned it a little to make it clearer to read, but the main credit should go to Rick.
class << Time unless method_defined? :now_before_time_travel alias_method :now_before_time_travel, :now end def now @now || now_before_time_travel end def travel_to(time, &block) @now = time block.call ensure @now = nil end end
def test_something_involving_time account = Time.travel_to(creation_time = Time.now) do Account.new end assert_equal creation_time, account.creation_time end