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class BlockingMatcher
def matches?(block)
t = Thread.new do
block.call
end
loop do
case t.status
when "sleep" # blocked
t.kill
t.join
return true
when false # terminated normally, so never blocked
t.join
return false
when nil # terminated exceptionally
t.value
else
Thread.pass
end
end
end
def failure_message
['Expected the given Proc', 'to block the caller']
end
def negative_failure_message
['Expected the given Proc', 'to not block the caller']
end
end
module MSpecMatchers
private def block_caller
BlockingMatcher.new
end
end
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