20 lines
413 B
Ruby
20 lines
413 B
Ruby
require 'test/unit'
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class TestString < Test::Unit::TestCase
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def check_sum(str, bits=16)
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sum = 0
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str.each_byte {|c| sum += c}
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sum = sum & ((1 << bits) - 1) if bits != 0
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assert_equal(sum, str.sum(bits))
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end
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def test_sum
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assert_equal(0, "".sum)
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assert_equal(294, "abc".sum)
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check_sum("abc")
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check_sum("\x80")
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0.upto(70) {|bits|
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check_sum("xyz", bits)
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}
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end
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end
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