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describe :thread_wakeup, shared: true do
it "can interrupt Kernel#sleep" do
exit_loop = false
after_sleep1 = false
after_sleep2 = false
t = Thread.new do
while true
break if exit_loop == true
Thread.pass
end
sleep
after_sleep1 = true
sleep
after_sleep2 = true
end
10.times { t.send(@method); Thread.pass }
t.status.should_not == "sleep"
exit_loop = true
10.times { sleep 0.1 if t.status and t.status != "sleep" }
after_sleep1.should == false # t should be blocked on the first sleep
t.send(@method)
10.times { sleep 0.1 if after_sleep1 != true }
10.times { sleep 0.1 if t.status and t.status != "sleep" }
after_sleep2.should == false # t should be blocked on the second sleep
t.send(@method)
t.join
end
it "does not result in a deadlock" do
t = Thread.new do
100.times { Thread.stop }
end
while t.status
begin
t.send(@method)
rescue ThreadError
# The thread might die right after.
t.status.should == false
end
Thread.pass
end
t.status.should == false
t.join
end
it "raises a ThreadError when trying to wake up a dead thread" do
t = Thread.new { 1 }
t.join
-> { t.send @method }.should raise_error(ThreadError)
end
end
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