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require_relative '../../spec_helper'
describe "Thread.exclusive" do
before :each do
ScratchPad.clear
$VERBOSE, @verbose = nil, $VERBOSE
end
after :each do
$VERBOSE = @verbose
end
it "yields to the block" do
Thread.exclusive { ScratchPad.record true }
ScratchPad.recorded.should == true
end
it "returns the result of yielding" do
Thread.exclusive { :result }.should == :result
end
it "blocks the caller if another thread is also in an exclusive block" do
m = Mutex.new
q1 = Queue.new
q2 = Queue.new
t = Thread.new {
Thread.exclusive {
q1.push :ready
q2.pop
}
}
q1.pop.should == :ready
-> { Thread.exclusive { } }.should block_caller
q2.push :done
t.join
end
it "is not recursive" do
Thread.exclusive do
-> { Thread.exclusive { } }.should raise_error(ThreadError)
end
end
end
|
