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require File.expand_path('../../../spec_helper', __FILE__)
describe "Mutex#lock" do
before :each do
ScratchPad.clear
end
it "returns self" do
m = Mutex.new
m.lock.should == m
m.unlock
end
it "waits if the lock is not available" do
m = Mutex.new
m.lock
th = Thread.new do
m.lock
ScratchPad.record :after_lock
end
Thread.pass while th.status and th.status != "sleep"
ScratchPad.recorded.should be_nil
m.unlock
th.join
ScratchPad.recorded.should == :after_lock
end
# Unable to find a specific ticket but behavior change may be
# related to this ML thread.
it "raises a ThreadError when used recursively" do
m = Mutex.new
th = Thread.new do
m.lock
m.lock
end
lambda do
th.join
end.should raise_error(ThreadError)
end
end
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