How can I test that no attribute on a model has been modified using rspec?

Question

I want to check if no attributes on an ActiveRecord object have been modified. Currently I'm doing this:

prev_attr = obj.attributes <- this will give me back a Hash with attr name and attr value

And then, later, I grab the attributes again and compare the 2 hashes. Is there another way?

Answer 1

You should just be able to use equality matchers - does this not work for you?

a = { :test => "a" }
b = { :test => "b" }
$ a == b
=> false
b = { :test => "a" }
$ a == b
=> true

Or to use your example:

original_attributes = obj.attributes
# do something that should *not* manipulate obj
new_attributes = obj.attributes
new_attributes.should eql original_attributes