问题
In RSpec, what's the difference between using should == ... and should eql(...)? I noticed that the RSpec documentation always uses eql, but == is less typing and easier to read. What am I missing?
回答1:
It's rather simple, really: should == sends the == message to the test subject, should eql sends the eql? message to the test subject. In other words: the two different tests send two completely different messages which invoke two completely different methods and thus do two completely different things. In particular, eql? is stricter than == but less strict than equals?.
回答2:
They are usually equivalent, but not always:
1 == 1.0 # => true
1.eql? 1.0 # => false
来源：https://stackoverflow.com/questions/3285199/rspec-difference-between-should-and-should-eql