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