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add tests.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45004 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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akr 2014-02-16 08:34:33 +00:00
parent 6ef6dab36d
commit f042e5113a
1 changed files with 24 additions and 0 deletions
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24
test/-ext-/bignum/test_pack.rb
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@ -212,6 +212,30 @@ class TestBignum < Test::Unit::TestCase
}
}
2.upto(16) {|wordsize|
w = wordsize
b = 8*wordsize-1
n = 2**b
assert_equal([-2, "\x7F"+"\xFF"*(w-2)+"\xFF"], (-n-1).test_pack(1, wordsize, 1, TWOCOMP|MSBYTE_FIRST))
assert_equal([-1, "\x00"+"\x00"*(w-2)+"\x00"], (-n ).test_pack(1, wordsize, 1, TWOCOMP|MSBYTE_FIRST))
assert_equal([-1, "\x00"+"\x00"*(w-2)+"\x01"], (-n+1).test_pack(1, wordsize, 1, TWOCOMP|MSBYTE_FIRST))
assert_equal([+1, "\x7F"+"\xFF"*(w-2)+"\xFF"], (+n-1).test_pack(1, wordsize, 1, TWOCOMP|MSBYTE_FIRST))
assert_equal([+2, "\x00"+"\x00"*(w-2)+"\x00"], (+n ).test_pack(1, wordsize, 1, TWOCOMP|MSBYTE_FIRST))
assert_equal([+2, "\x00"+"\x00"*(w-2)+"\x01"], (+n+1).test_pack(1, wordsize, 1, TWOCOMP|MSBYTE_FIRST))
}
2.upto(16) {|wordsize|
w = wordsize
b = 8*wordsize-1
n = 2**b
assert_equal([-2, "\xFF"+"\xFF"*(w-2)+"\x7F"], (-n-1).test_pack(1, wordsize, 1, TWOCOMP|LSBYTE_FIRST))
assert_equal([-1, "\x00"+"\x00"*(w-2)+"\x00"], (-n ).test_pack(1, wordsize, 1, TWOCOMP|LSBYTE_FIRST))
assert_equal([-1, "\x01"+"\x00"*(w-2)+"\x00"], (-n+1).test_pack(1, wordsize, 1, TWOCOMP|LSBYTE_FIRST))
assert_equal([+1, "\xFF"+"\xFF"*(w-2)+"\x7F"], (+n-1).test_pack(1, wordsize, 1, TWOCOMP|LSBYTE_FIRST))
assert_equal([+2, "\x00"+"\x00"*(w-2)+"\x00"], (+n ).test_pack(1, wordsize, 1, TWOCOMP|LSBYTE_FIRST))
assert_equal([+2, "\x01"+"\x00"*(w-2)+"\x00"], (+n+1).test_pack(1, wordsize, 1, TWOCOMP|LSBYTE_FIRST))
}
end
def test_unpack_zero