[rspec-users] Specyfing behaviour VS specifying implementation

[Piotr Wlodarek]

At first it seems obvious: one should specify behaviour, not
implementation.

However, there may be a tremendous overhead and duplication with such
approach.

Let's assume:

def a
  # lot's of business logic
end

deb b
  # lot's of business logic
end

def main
  a
  b
end

Assuming we do have specs for methods a and b, how the main method
should be specified?

1) Full behaviour specification
   Problem: it duplicates specification of a and b

2) Specify that main should call a, then b
   Problem: it specifies implementation, NOT behaviour


So, what is the right way?
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