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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../../../shared/fiber/resume', __FILE__)
with_feature :fiber_library do
require 'fiber'
describe "Fiber#transfer" do
it_behaves_like :fiber_resume, :transfer
end
describe "Fiber#transfer" do
it "transfers control from one Fiber to another when called from a Fiber" do
fiber1 = Fiber.new { :fiber1 }
fiber2 = Fiber.new { fiber1.transfer; :fiber2 }
fiber2.resume.should == :fiber1
end
it "can be invoked from the same Fiber it transfers control to" do
states = []
fiber = Fiber.new { states << :start; fiber.transfer; states << :end }
fiber.transfer
states.should == [:start, :end]
states = []
fiber = Fiber.new { states << :start; fiber.transfer; states << :end }
fiber.resume
states.should == [:start, :end]
end
it "can transfer control to a Fiber that has transfered to another Fiber" do
states = []
fiber1 = Fiber.new { states << :fiber1 }
fiber2 = Fiber.new { states << :fiber2_start; fiber1.transfer; states << :fiber2_end}
fiber2.resume.should == [:fiber2_start, :fiber1]
fiber2.transfer.should == [:fiber2_start, :fiber1, :fiber2_end]
end
it "raises a FiberError when transferring to a Fiber which resumes itself" do
fiber = Fiber.new { fiber.resume }
lambda { fiber.transfer }.should raise_error(FiberError)
end
end
end
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