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require 'rubygems/test_case'
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require 'rubygems'
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class TestConfig < Gem::TestCase
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def test_datadir
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_, err = capture_io do
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datadir = RbConfig::CONFIG['datadir']
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assert_equal "#{datadir}/xyz", RbConfig.datadir('xyz')
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end
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assert_match(/deprecate/, err)
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end
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end
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