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require_relative '../../spec_helper'
describe "Mutex#unlock" do
it "raises ThreadError unless Mutex is locked" do
mutex = Mutex.new
-> { mutex.unlock }.should raise_error(ThreadError)
end
it "raises ThreadError unless thread owns Mutex" do
mutex = Mutex.new
wait = Mutex.new
wait.lock
th = Thread.new do
mutex.lock
wait.lock
end
# avoid race on mutex.lock
Thread.pass until mutex.locked?
Thread.pass until th.stop?
-> { mutex.unlock }.should raise_error(ThreadError)
wait.unlock
th.join
end
it "raises ThreadError if previously locking thread is gone" do
mutex = Mutex.new
th = Thread.new do
mutex.lock
end
th.join
-> { mutex.unlock }.should raise_error(ThreadError)
end
end
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