Hello,
I'm toying around with a matcher to compare the interface of two classes.
I intend to use this where ever I am providing an explicit fake or stub
of a class.
class MatchInterface
def initialize(klass)
@klass = klass
end
def matches?(other)
@other = other
@lhs = @klass.public_instance_methods
@rhs = @other.public_instance_methods
lhs == rhs
end
def failure_message
diff = (@lhs - @rhs) + (@rhs - @lhs)
"The following methods are different:\n#{diff.join("\n")}"
end
end
I'd like to include
* Class methods
* Arity verification (would love to use RSpec::Support::MethodSignature
for this ... might consider making it public)
* Partial interface (i.e. it doesn't implement all methods, but the ones
it does are correct and valid)
Has anyone built anything like this already?
Xav
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