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require_relative '../../spec_helper'
require 'fiber'
describe "Fiber.current" do
ruby_version_is "3.1" do
it "is available without an extra require" do
ruby_exe("print Fiber.current.class", options: '--disable-gems --disable-did-you-mean').should == "Fiber"
end
end
it "returns the root Fiber when called outside of a Fiber" do
root = Fiber.current
root.should be_an_instance_of(Fiber)
# We can always transfer to the root Fiber; it will never die
5.times do
root.transfer.should be_nil
root.alive?.should be_true
end
end
it "returns the current Fiber when called from a Fiber" do
fiber = Fiber.new do
this = Fiber.current
this.should be_an_instance_of(Fiber)
this.should == fiber
this.alive?.should be_true
end
fiber.resume
end
it "returns the current Fiber when called from a Fiber that transferred to another" do
states = []
fiber = Fiber.new do
states << :fiber
this = Fiber.current
this.should be_an_instance_of(Fiber)
this.should == fiber
this.alive?.should be_true
end
fiber2 = Fiber.new do
states << :fiber2
fiber.transfer
flunk
end
fiber3 = Fiber.new do
states << :fiber3
fiber2.transfer
states << :fiber3_terminated
end
fiber3.resume
states.should == [:fiber3, :fiber2, :fiber, :fiber3_terminated]
end
end
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