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module ThreadInstrumentation
module TestHelper
private
def record
Bug::ThreadInstrumentation.register_callback(!ENV["GVL_DEBUG"])
yield
ensure
timeline = Bug::ThreadInstrumentation.unregister_callback
if $!
raise
else
return timeline
end
end
def timeline_for(thread, timeline)
timeline.select { |t, _| t == thread }.map(&:last)
end
def assert_consistent_timeline(events)
refute_predicate events, :empty?
previous_event = nil
events.each do |event|
refute_equal :exited, previous_event, "`exited` must be the final event: #{events.inspect}"
case event
when :started
assert_nil previous_event, "`started` must be the first event: #{events.inspect}"
when :ready
unless previous_event.nil?
assert %i(started suspended).include?(previous_event), "`ready` must be preceded by `started` or `suspended`: #{events.inspect}"
end
when :resumed
unless previous_event.nil?
assert_equal :ready, previous_event, "`resumed` must be preceded by `ready`: #{events.inspect}"
end
when :suspended
unless previous_event.nil?
assert_equal :resumed, previous_event, "`suspended` must be preceded by `resumed`: #{events.inspect}"
end
when :exited
unless previous_event.nil?
assert %i(resumed suspended).include?(previous_event), "`exited` must be preceded by `resumed` or `suspended`: #{events.inspect}"
end
end
previous_event = event
end
end
end
end
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