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require_relative '../../spec_helper'
describe "Fiber.new" do
it "creates a fiber from the given block" do
fiber = Fiber.new {}
fiber.resume
fiber.should be_an_instance_of(Fiber)
end
it "creates a fiber from a subclass" do
class MyFiber < Fiber
end
fiber = MyFiber.new {}
fiber.resume
fiber.should be_an_instance_of(MyFiber)
end
it "raises an ArgumentError if called without a block" do
-> { Fiber.new }.should raise_error(ArgumentError)
end
it "does not invoke the block" do
invoked = false
fiber = Fiber.new { invoked = true }
invoked.should be_false
fiber.resume
end
it "closes over lexical environments" do
o = Object.new
def o.f
a = 1
f = Fiber.new { a = 2 }
f.resume
a
end
o.f.should == 2
end
end
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