Created
October 22, 2009 01:10
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a quick and dirty example of how to stub a method on an object
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require 'singleton' | |
class BlockTest | |
def test | |
puts "this is the real method." | |
yield if block_given? | |
end | |
end | |
class Object | |
def stub_method(method) | |
Foo::Bar.instance.stub_it(self, method) | |
end | |
end | |
module Foo | |
class Bar | |
include Singleton | |
def stub_it(object, method) | |
object.instance_eval(<<-EOF, __FILE__, __LINE__) | |
def #{method} | |
puts "this is a stubbed method." | |
yield if block_given? | |
end | |
EOF | |
end | |
end | |
end | |
bt = BlockTest.new | |
bt.test { puts "and a block from the real method"} | |
bt.stub_method(:test) | |
bt.test { puts "and a block from the subbed method"} | |
# output is: | |
# => this is the real method. | |
# => and a block from the real method | |
# => this is a stubbed method. | |
# => and a block from the stubbed method |
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