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# tests that leave extra threads running can break other tests in weird ways ... prevent that from happening
module Maxitest
module Threads
def setup
@maxitest_threads_before = Thread.list
super
end
def teardown
super
found = maxitest_extra_threads
raise "Test left #{found.size} extra threads (#{found})" if found.any?
ensure
maxitest_kill_extra_threads
end
# also a helper methods for users
def maxitest_wait_for_extra_threads
sleep 0.01 while maxitest_extra_threads.any?
end
# also a helper methods for users
def maxitest_kill_extra_threads
maxitest_extra_threads.map(&:kill).map(&:join)
end
# if setup crashes we do not return anything to make the initial error visible
def maxitest_extra_threads
@maxitest_threads_before ? Thread.list - @maxitest_threads_before : []
end
end
end
# not using prepend since that would clash with webmock
# include works because original setup lives in also included Minitest::LifecycleHooks
Minitest::Test.send :include, Maxitest::Threads
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