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require 'test/unit'
require 'stringio'
class TestStringIO < Test::Unit::TestCase
def test_empty_file
f = StringIO.new("")
assert_equal("", f.read(0))
assert_equal("", f.read)
assert_equal(nil, f.read(0))
f = StringIO.new("")
assert_equal(nil, f.read(1))
assert_equal(nil, f.read)
assert_equal(nil, f.read(1))
end
end
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