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Allow actions to be forked for testing #15

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Allow actions to be forked for testing #15

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4 changes: 4 additions & 0 deletions lib/grand_central/action.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,10 @@ def self.with_attributes *attributes, &body
instance_variable_set "@#{attribute}", args[index]
end
end
define_singleton_method :fork do
with_attributes *attributes, &body
end

klass.send :attr_reader, *attributes
klass.class_exec &body if block_given?

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12 changes: 12 additions & 0 deletions spec/grand_central/action_spec.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -137,5 +137,17 @@ def promise.always &block

expect(store.state).to eq [1, 2, 3]
end

it 'can be forked into a new action with the same attributes' do
klass = Action.with_attributes(:foo, :bar)
forked = klass.fork

expect(forked).not_to be klass
expect(forked.superclass).to be klass

action = forked.new(1, 2)
expect(action.foo).to eq 1
expect(action.bar).to eq 2
end
end
end