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44785befea
array as argument. * test/ruby/test_*.rb: moved invariants to left side in assert_equal, and use assert_nil, assert_raises and so on. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4516 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
89 lines
2 KiB
Ruby
89 lines
2 KiB
Ruby
require 'test/unit'
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$KCODE = 'none'
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class TestBignum < Test::Unit::TestCase
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def fact(n)
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return 1 if n == 0
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f = 1
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while n>0
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f *= n
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n -= 1
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end
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return f
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end
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def test_bignum
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$x = fact(40)
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assert_equal($x, $x)
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assert_equal($x, fact(40))
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assert($x < $x+2)
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assert($x > $x-2)
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assert_equal(815915283247897734345611269596115894272000000000, $x)
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assert_not_equal(815915283247897734345611269596115894272000000001, $x)
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assert_equal(815915283247897734345611269596115894272000000001, $x+1)
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assert_equal(335367096786357081410764800000, $x/fact(20))
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$x = -$x
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assert_equal(-815915283247897734345611269596115894272000000000, $x)
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assert_equal(2-(2**32), -(2**32-2))
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assert_equal(2**32 - 5, (2**32-3)-2)
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for i in 1000..1014
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assert_equal(2 ** i, 1 << i)
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end
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n1 = 1 << 1000
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for i in 1000..1014
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assert_equal(n1, 1 << i)
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n1 *= 2
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end
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n2=n1
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for i in 1..10
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n1 = n1 / 2
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n2 = n2 >> 1
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assert_equal(n1, n2)
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end
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for i in 4000..4096
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n1 = 1 << i;
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assert_equal(n1-1, (n1**2-1) / (n1+1))
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end
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end
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def test_calc
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b = 10**80
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a = b * 9 + 7
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assert_equal(7, a.modulo(b))
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assert_equal(-b + 7, a.modulo(-b))
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assert_equal(b + -7, (-a).modulo(b))
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assert_equal(-7, (-a).modulo(-b))
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assert_equal(7, a.remainder(b))
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assert_equal(7, a.remainder(-b))
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assert_equal(-7, (-a).remainder(b))
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assert_equal(-7, (-a).remainder(-b))
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assert_equal(10000000000000000000100000000000000000000, 10**40+10**20)
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assert_equal(100000000000000000000, 10**40/10**20)
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a = 677330545177305025495135714080
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b = 14269972710765292560
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assert_equal(0, a % b)
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assert_equal(0, -a % b)
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end
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def test_shift
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def shift_test(a)
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b = a / (2 ** 32)
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c = a >> 32
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assert_equal(b, c)
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b = a * (2 ** 32)
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c = a << 32
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assert_equal(b, c)
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end
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shift_test(-4518325415524767873)
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shift_test(-0xfffffffffffffffff)
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end
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end
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