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MethodCop
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| module MethodCop | |
| # guard methods that have side effects with a callback that fires before the method is invoked. If the callback returns a "falsey" value, | |
| # the method is halted and will not be called. The callback will return nil instead. | |
| # if the method does not have side effects or you depend on its return value, you should NOT use this on that method! | |
| def guard_method(name, options) | |
| method = name.to_sym | |
| original_method = "#{name}_orig".to_sym | |
| alias_method original_method, method | |
| define_method(name.to_sym) do | |
| unless options[:with].nil? | |
| unless !self.send(options[:with].to_sym) | |
| self.send(original_method) | |
| else | |
| # THIS METHOD IS UNDER ARREST | |
| nil | |
| end | |
| else | |
| # no method to guard with was given | |
| self.send(method) | |
| end | |
| end | |
| end | |
| end | |
| class Testing | |
| extend MethodCop | |
| def some_method | |
| return "I'm about to do something horribly wrong." | |
| end | |
| def run_method? | |
| # block everything | |
| return false | |
| end | |
| guard_method :some_method, :with => :run_method? | |
| end |
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