diff options
| -rw-r--r-- | test/-ext-/bignum/test_pack.rb | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/-ext-/bignum/test_pack.rb b/test/-ext-/bignum/test_pack.rb index 0614e1046c..f2a3df814e 100644 --- a/test/-ext-/bignum/test_pack.rb +++ b/test/-ext-/bignum/test_pack.rb @@ -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 |