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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Thread#priority" do
before :each do
@current_priority = Thread.current.priority
ThreadSpecs.clear_state
@thread = Thread.new { Thread.pass until ThreadSpecs.state == :exit }
Thread.pass until @thread.alive?
end
after :each do
ThreadSpecs.state = :exit
@thread.join
end
it "inherits the priority of the current thread while running" do
@thread.alive?.should be_true
@thread.priority.should == @current_priority
end
it "maintain the priority of the current thread after death" do
ThreadSpecs.state = :exit
@thread.join
@thread.alive?.should be_false
@thread.priority.should == @current_priority
end
it "returns an integer" do
@thread.priority.should be_kind_of(Integer)
end
end
describe "Thread#priority=" do
before :each do
ThreadSpecs.clear_state
@thread = Thread.new { Thread.pass until ThreadSpecs.state == :exit }
Thread.pass until @thread.alive?
end
after :each do
ThreadSpecs.state = :exit
@thread.join
end
describe "when set with an integer" do
it "returns an integer" do
value = (@thread.priority = 3)
value.should == 3
end
it "clamps the priority to -3..3" do
@thread.priority = 42
@thread.priority.should == 3
@thread.priority = -42
@thread.priority.should == -3
end
end
describe "when set with a non-integer" do
it "raises a type error" do
lambda{ @thread.priority = Object.new }.should raise_error(TypeError)
end
end
it "sets priority even when the thread has died" do
thread = Thread.new {}
thread.join
thread.priority = 3
thread.priority.should == 3
end
end
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