require 'test/unit' class TestSleep < Test::Unit::TestCase def test_sleep_5sec GC.disable start = Time.now sleep 5 slept = Time.now-start bottom = case RUBY_PLATFORM when /linux/ 4.98 if /Linux ([\d.]+)/ =~ `uname -sr` && ($1.split('.')<=>%w/2 6 18/)<1 when /mswin|mingw/ 4.98 end bottom ||= 5.0 assert_operator(slept, :>=, bottom) assert_operator(slept, :<=, 6.0, "[ruby-core:18015]: longer than expected") ensure GC.enable end end