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require 'test/unit'
class TestInteger < Test::Unit::TestCase
VS = [
-0x10000000000000001,
-0x10000000000000000,
-0xffffffffffffffff,
-0x4000000000000001,
-0x4000000000000000,
-0x3fffffffffffffff,
-0x100000001,
-0x100000000,
-0xffffffff,
-0xc717a08d,
-0x524b2245,
-0x40000001,
-0x40000000,
-0x3fffffff,
-0x8101,
-0x7f01,
-65,
-64,
-63,
-62,
-33,
-32,
-31,
-30,
-3,
-2,
-1,
0,
1,
2,
3,
30,
31,
32,
33,
62,
63,
64,
65,
0x7f01,
0x8101,
0x3ffffffe,
0x3fffffff,
0x40000000,
0x524b2245,
0xc717a08d,
0xffffffff,
0x100000000,
0x100000001,
0x3ffffffffffffffe,
0x3fffffffffffffff,
0x4000000000000000,
0xfffffffffffffffe,
0xffffffffffffffff,
0x10000000000000000,
]
def test_plus
VS.each {|a|
VS.each {|b|
c = a + b
assert_equal(a, c - b, "(#{a} + #{b}) - #{b}")
assert_equal(b, c - a, "(#{a} + #{b}) - #{a}")
assert_equal(a-~b-1, c, "#{a} + #{b}") # Hacker's Delight
assert_equal((a^b)+2*(a&b), c, "#{a} + #{b}") # Hacker's Delight
assert_equal((a|b)+(a&b), c, "#{a} + #{b}") # Hacker's Delight
assert_equal(2*(a|b)-(a^b), c, "#{a} + #{b}") # Hacker's Delight
}
}
end
def test_minus
VS.each {|a|
VS.each {|b|
c = a - b
assert_equal(a, c + b, "(#{a} - #{b}) + #{b}")
assert_equal(-b, c - a, "(#{a} - #{b}) - #{a}")
assert_equal(a+~b+1, c, "#{a} - #{b}") # Hacker's Delight
assert_equal((a^b)-2*(b&~a), c, "#{a} - #{b}") # Hacker's Delight
assert_equal((a&~b)-(b&~a), c, "#{a} - #{b}") # Hacker's Delight
assert_equal(2*(a&~b)-(a^b), c, "#{a} - #{b}") # Hacker's Delight
}
}
end
def test_mult
VS.each {|a|
VS.each {|b|
c = a * b
assert_equal(a, c / b, "(#{a} * #{b}) / #{b}") if b != 0
assert_equal(b, c / a, "(#{a} * #{b}) / #{a}") if a != 0
assert_equal(a.abs * b.abs, (a * b).abs, "(#{a} * #{b}).abs")
}
}
end
def test_divmod
VS.each {|a|
VS.each {|b|
next if b == 0
q, r = a.divmod(b)
assert_equal(a, b*q+r)
assert(r.abs < b.abs)
assert(0 < b ? (0 <= r && r < b) : (b < r && r <= 0))
assert_equal(q, a/b)
assert_equal(q, a.div(b))
assert_equal(r, a%b)
assert_equal(r, a.modulo(b))
}
}
end
def test_pow
small_values = VS.find_all {|v| 0 < v && v < 1000 }
VS.each {|a|
small_values.each {|b|
c = a ** b
d = 1
b.times { d *= a }
assert_equal(d, c, "(#{a}) ** #{b}")
}
}
end
def test_not
VS.each {|a|
b = ~a
assert_equal(-1 ^ a, b, "~#{a}")
assert_equal(-a-1, b, "~#{a}") # Hacker's Delight
assert_equal(0, a & b, "#{a} & ~#{a}")
assert_equal(-1, a | b, "#{a} | ~#{a}")
}
end
def test_or
VS.each {|a|
VS.each {|b|
c = a | b
assert_equal(a + b - (a&b), c, "#{a} | #{b}")
assert_equal((a & ~b) + b, c, "#{a} | #{b}") # Hacker's Delight
assert_equal(-1, c | ~a, "(#{a} | #{b}) | ~#{a})")
assert_equal(-1, c | ~b, "(#{a} | #{b}) | ~#{b})")
}
}
end
def test_and
VS.each {|a|
VS.each {|b|
c = a & b
assert_equal(a + b - (a|b), c, "#{a} & #{b}")
assert_equal((~a | b) - ~a, c, "#{a} & #{b}") # Hacker's Delight
assert_equal(0, c & ~a, "(#{a} & #{b}) & ~#{a}")
assert_equal(0, c & ~b, "(#{a} & #{b}) & ~#{b}")
}
}
end
def test_xor
VS.each {|a|
VS.each {|b|
c = a ^ b
assert_equal((a|b)-(a&b), c, "#{a} ^ #{b}") # Hacker's Delight
assert_equal(b, c ^ a, "(#{a} ^ #{b}) ^ #{a}")
assert_equal(a, c ^ b, "(#{a} ^ #{b}) ^ #{b}")
}
}
end
def test_lshift
small_values = VS.find_all {|v| -1000 < v && v < 1000 }
VS.each {|a|
small_values.each {|b|
c = a << b
if 0 <= b
assert_equal(a, c >> b, "(#{a} << #{b}) >> #{b}")
assert_equal(a * 2**b, c, "#{a} << #{b}")
else
assert_equal(a / 2**(-b), c, "#{a} << #{b}")
end
}
}
end
def test_rshift
small_values = VS.find_all {|v| -1000 < v && v < 1000 }
VS.each {|a|
small_values.each {|b|
c = a >> b
if 0 < b
assert_equal(a / 2**b, c, "#{a} >> #{b}")
else
assert_equal(a, c << b, "(#{a} >> #{b}) << #{b}")
assert_equal(a * 2**(-b), c, "#{a} >> #{b}")
end
}
}
end
def test_succ
VS.each {|a|
b = a.succ
assert_equal(a+1, b, "(#{a}).succ")
assert_equal(a, b.pred, "(#{a}).succ.pred")
}
end
def test_pred
VS.each {|a|
b = a.pred
assert_equal(a-1, b, "(#{a}).pred")
assert_equal(a, b.succ, "(#{a}).pred.succ")
}
end
def test_unary_plus
VS.each {|a|
b = +a
assert_equal(a, b, "+(#{a})")
}
end
def test_unary_minus
VS.each {|a|
b = -a
assert_equal(0-a, b, "-(#{a})")
}
end
def test_eq
VS.each_with_index {|a, i|
VS.each_with_index {|b, j|
c = a == b
assert_equal(i == j, c, "#{a} == #{b}")
}
}
end
def test_abs
VS.each {|a|
b = a.abs
if a < 0
assert_equal(-a, b, "(#{a}).abs")
else
assert_equal(a, b, "(#{a}).abs")
end
}
end
def test_ceil
VS.each {|a|
assert_equal(a, a.ceil, "(#{a}).ceil")
}
end
def test_floor
VS.each {|a|
assert_equal(a, a.floor, "(#{a}).floor")
}
end
def test_round
VS.each {|a|
assert_equal(a, a.round, "(#{a}).round")
}
end
def test_truncate
VS.each {|a|
assert_equal(a, a.truncate, "(#{a}).truncate")
}
end
def test_remainder
VS.each {|a|
VS.each {|b|
next if b == 0
r = a.remainder(b)
if a < 0
assert_operator(-b.abs, :<, r, "#{a}.remainder(#{b})")
assert_operator(r, :<=, 0, "#{a}.remainder(#{b})")
elsif 0 < a
assert_operator(0, :<=, r, "#{a}.remainder(#{b})")
assert_operator(r, :<, b.abs, "#{a}.remainder(#{b})")
else
assert_equal(0, r, "#{a}.remainder(#{b})")
end
}
}
end
def test_nonzero?
VS.each {|a|
b = a.nonzero?
if a == 0
assert_equal(nil, b, "(#{a}).nonzero?")
else
assert_equal(a, b, "(#{a}).nonzero?")
end
}
end
def test_zero?
VS.each {|a|
b = a.zero?
if a == 0
assert_equal(true, b, "(#{a}).zero?")
else
assert_equal(false, b, "(#{a}).zero?")
end
}
end
end
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