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require 'mocha/metaclass'
module Mocha
class ClassMethod
attr_reader :stubbee, :method
def initialize(stubbee, method)
@stubbee, @method = stubbee, method
end
def stub
hide_original_method
define_new_method
end
def unstub
remove_new_method
restore_original_method
stubbee.reset_mocha
end
def mock
stubbee.mocha
end
def hide_original_method
if method_exists?(method)
begin
stubbee.__metaclass__.class_eval("alias_method :#{hidden_method}, :#{method}", __FILE__, __LINE__)
rescue NameError
# deal with nasties like ActiveRecord::Associations::AssociationProxy
end
end
end
def define_new_method
stubbee.__metaclass__.class_eval("def #{method}(*args, &block); mocha.method_missing(:#{method}, *args, &block); end", __FILE__, __LINE__)
end
def remove_new_method
stubbee.__metaclass__.class_eval("remove_method :#{method}", __FILE__, __LINE__)
end
def restore_original_method
if method_exists?(hidden_method)
begin
stubbee.__metaclass__.class_eval("alias_method :#{method}, :#{hidden_method}; remove_method :#{hidden_method}", __FILE__, __LINE__)
rescue NameError
# deal with nasties like ActiveRecord::Associations::AssociationProxy
end
end
end
def hidden_method
if RUBY_VERSION < '1.9'
method_name = method.to_s.gsub(/\W/) { |s| "_substituted_character_#{s[0]}_" }
else
method_name = method.to_s.gsub(/\W/) { |s| "_substituted_character_#{s.ord}_" }
end
"__stubba__#{method_name}__stubba__"
end
def eql?(other)
return false unless (other.class == self.class)
(stubbee.object_id == other.stubbee.object_id) and (method == other.method)
end
alias_method :==, :eql?
def to_s
"#{stubbee}.#{method}"
end
def method_exists?(method)
existing_methods = []
existing_methods += stubbee.public_methods(true) - stubbee.superclass.public_methods(true)
existing_methods += stubbee.protected_methods(true) - stubbee.superclass.protected_methods(true)
existing_methods += stubbee.private_methods(true) - stubbee.superclass.private_methods(true)
existing_methods.any? { |m| m.to_s == method.to_s }
end
end
end
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