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ruby--ruby/test/bigdecimal/test_bigdecimal.rb
mrkn ea68278fe3 bigdecimal: version 1.3.4 
Import bigdecimal version 1.3.4.  The full commit log is here:

  https://github.com/ruby/bigdecimal/compare/v1.3.3...v1.3.4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61441 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-12-24 06:22:41 +00:00

1842 lines
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# frozen_string_literal: false
require_relative "testbase"
require 'bigdecimal/math'
class TestBigDecimal < Test::Unit::TestCase
include TestBigDecimalBase
ROUNDING_MODE_MAP = [
[ BigDecimal::ROUND_UP, :up],
[ BigDecimal::ROUND_DOWN, :down],
[ BigDecimal::ROUND_DOWN, :truncate],
[ BigDecimal::ROUND_HALF_UP, :half_up],
[ BigDecimal::ROUND_HALF_UP, :default],
[ BigDecimal::ROUND_HALF_DOWN, :half_down],
[ BigDecimal::ROUND_HALF_EVEN, :half_even],
[ BigDecimal::ROUND_HALF_EVEN, :banker],
[ BigDecimal::ROUND_CEILING, :ceiling],
[ BigDecimal::ROUND_CEILING, :ceil],
[ BigDecimal::ROUND_FLOOR, :floor],
]
def assert_nan(x)
assert(x.nan?, "Expected #{x.inspect} to be NaN")
end
def assert_positive_infinite(x)
assert(x.infinite?, "Expected #{x.inspect} to be positive infinite")
assert_operator(x, :>, 0)
end
def assert_negative_infinite(x)
assert(x.infinite?, "Expected #{x.inspect} to be negative infinite")
assert_operator(x, :<, 0)
end
def assert_positive_zero(x)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, x.sign,
"Expected #{x.inspect} to be positive zero")
end
def assert_negative_zero(x)
assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, x.sign,
"Expected #{x.inspect} to be negative zero")
end
def test_not_equal
assert_not_equal BigDecimal("1"), BigDecimal.allocate
end
def test_global_new
assert_equal(1, BigDecimal("1"))
assert_equal(1, BigDecimal("1", 1))
assert_raise(ArgumentError) { BigDecimal("1", -1) }
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_equal(1234, BigDecimal(" \t\n\r \r1234 \t\n\r \r"))
assert_positive_infinite(BigDecimal(" \t\n\r \rInfinity \t\n\r \r"))
assert_negative_infinite(BigDecimal(" \t\n\r \r-Infinity \t\n\r \r"))
assert_nan(BigDecimal(" \t\n\r \rNaN \t\n\r \r"))
end
end
def test_global_new_with_invalid_string
[
'', '.', 'e1', 'd1', '.e', '.d', '1.e', '1.d', '.1e', '.1d',
'invlaid value'
].each do |invalid_string|
assert_raise_with_message(ArgumentError, %Q[invalid value for BigDecimal(): "#{invalid_string}"]) do
BigDecimal(invalid_string)
end
end
end
def test_global_new_with_integer
assert_equal(BigDecimal("1"), BigDecimal(1))
assert_equal(BigDecimal("-1"), BigDecimal(-1))
assert_equal(BigDecimal((2**100).to_s), BigDecimal(2**100))
assert_equal(BigDecimal((-2**100).to_s), BigDecimal(-2**100))
end
def test_global_new_with_rational
assert_equal(BigDecimal("0.333333333333333333333"), BigDecimal(1.quo(3), 21))
assert_equal(BigDecimal("-0.333333333333333333333"), BigDecimal(-1.quo(3), 21))
assert_raise_with_message(ArgumentError, "can't omit precision for a Rational.") { BigDecimal(42.quo(7)) }
end
def test_global_new_with_float
assert_equal(BigDecimal("0.1235"), BigDecimal(0.1234567, 4))
assert_equal(BigDecimal("-0.1235"), BigDecimal(-0.1234567, 4))
assert_raise_with_message(ArgumentError, "can't omit precision for a Float.") { BigDecimal(4.2) }
assert_raise(ArgumentError) { BigDecimal(0.1, Float::DIG + 2) }
assert_nothing_raised { BigDecimal(0.1, Float::DIG + 1) }
bug9214 = '[ruby-core:58858]'
assert_equal(BigDecimal(-0.0, Float::DIG).sign, -1, bug9214)
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_nan(BigDecimal(Float::NAN))
end
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert_positive_infinite(BigDecimal(Float::INFINITY))
assert_negative_infinite(BigDecimal(-Float::INFINITY))
end
end
def test_global_new_with_big_decimal
assert_equal(BigDecimal(1), BigDecimal(BigDecimal(1)))
assert_equal(BigDecimal('+0'), BigDecimal(BigDecimal('+0')))
assert_equal(BigDecimal('-0'), BigDecimal(BigDecimal('-0')))
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_positive_infinite(BigDecimal(BigDecimal('Infinity')))
assert_negative_infinite(BigDecimal(BigDecimal('-Infinity')))
assert_nan(BigDecimal(BigDecimal('NaN')))
end
end
def test_global_new_with_tainted_string
Thread.new {
$SAFE = 1
BigDecimal('1'.taint)
}.join
end
def test_s_ver
assert_warning(/BigDecimal\.ver is deprecated; use BigDecimal::VERSION instead/) do
BigDecimal.ver
end
end
def test_s_new
assert_warning(/BigDecimal.new is deprecated/) do
BigDecimal.new("1")
end
end
def test_new
assert_equal(1, BigDecimal("1"))
assert_equal(1, BigDecimal("1", 1))
assert_equal(1, BigDecimal(" 1 "))
assert_equal(111, BigDecimal("1_1_1_"))
assert_equal(10**(-1), BigDecimal("1E-1"), '#4825')
assert_raise(ArgumentError, /"_1_1_1"/) { BigDecimal("_1_1_1") }
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_positive_infinite(BigDecimal("Infinity"))
assert_negative_infinite(BigDecimal("-Infinity"))
assert_nan(BigDecimal("NaN"))
assert_positive_infinite(BigDecimal("1E1111111111111111111"))
end
def test_new_with_integer
assert_equal(BigDecimal("1"), BigDecimal(1))
assert_equal(BigDecimal("-1"), BigDecimal(-1))
assert_equal(BigDecimal((2**100).to_s), BigDecimal(2**100))
assert_equal(BigDecimal((-2**100).to_s), BigDecimal(-2**100))
end
def test_new_with_rational
assert_equal(BigDecimal("0.333333333333333333333"), BigDecimal(1.quo(3), 21))
assert_equal(BigDecimal("-0.333333333333333333333"), BigDecimal(-1.quo(3), 21))
assert_raise(ArgumentError) { BigDecimal(1.quo(3)) }
end
def test_new_with_float
assert_equal(BigDecimal("0.1235"), BigDecimal(0.1234567, 4))
assert_equal(BigDecimal("-0.1235"), BigDecimal(-0.1234567, 4))
assert_raise(ArgumentError) { BigDecimal(0.1) }
assert_raise(ArgumentError) { BigDecimal(0.1, Float::DIG + 2) }
assert_nothing_raised { BigDecimal(0.1, Float::DIG + 1) }
end
def test_new_with_big_decimal
assert_equal(BigDecimal(1), BigDecimal(BigDecimal(1)))
assert_equal(BigDecimal('+0'), BigDecimal(BigDecimal('+0')))
assert_equal(BigDecimal('-0'), BigDecimal(BigDecimal('-0')))
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_positive_infinite(BigDecimal(BigDecimal('Infinity')))
assert_negative_infinite(BigDecimal(BigDecimal('-Infinity')))
assert_nan(BigDecimal(BigDecimal('NaN')))
end
end
def test_new_with_tainted_string
Thread.new {
$SAFE = 1
BigDecimal('1'.taint)
}.join
end
def _test_mode(type)
BigDecimal.mode(type, true)
assert_raise(FloatDomainError) { yield }
BigDecimal.mode(type, false)
assert_nothing_raised { yield }
end
def test_mode
assert_raise(ArgumentError) { BigDecimal.mode(BigDecimal::EXCEPTION_ALL, 1) }
assert_raise(ArgumentError) { BigDecimal.mode(BigDecimal::ROUND_MODE, 256) }
assert_raise(ArgumentError) { BigDecimal.mode(BigDecimal::ROUND_MODE, :xyzzy) }
assert_raise(TypeError) { BigDecimal.mode(0xf000, true) }
begin
saved_mode = BigDecimal.mode(BigDecimal::ROUND_MODE)
[ BigDecimal::ROUND_UP,
BigDecimal::ROUND_DOWN,
BigDecimal::ROUND_HALF_UP,
BigDecimal::ROUND_HALF_DOWN,
BigDecimal::ROUND_CEILING,
BigDecimal::ROUND_FLOOR,
BigDecimal::ROUND_HALF_EVEN,
].each do |mode|
BigDecimal.mode(BigDecimal::ROUND_MODE, mode)
assert_equal(mode, BigDecimal.mode(BigDecimal::ROUND_MODE))
end
ensure
BigDecimal.mode(BigDecimal::ROUND_MODE, saved_mode)
end
BigDecimal.save_rounding_mode do
ROUNDING_MODE_MAP.each do |const, sym|
BigDecimal.mode(BigDecimal::ROUND_MODE, sym)
assert_equal(const, BigDecimal.mode(BigDecimal::ROUND_MODE))
end
end
end
def test_thread_local_mode
begin
saved_mode = BigDecimal.mode(BigDecimal::ROUND_MODE)
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_UP)
Thread.start {
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_EVEN)
assert_equal(BigDecimal::ROUND_HALF_EVEN, BigDecimal.mode(BigDecimal::ROUND_MODE))
}.join
assert_equal(BigDecimal::ROUND_UP, BigDecimal.mode(BigDecimal::ROUND_MODE))
ensure
BigDecimal.mode(BigDecimal::ROUND_MODE, saved_mode)
end
end
def test_save_exception_mode
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
mode = BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW)
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, true)
end
assert_equal(mode, BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW))
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_FLOOR)
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_EVEN)
end
assert_equal(BigDecimal::ROUND_HALF_EVEN, BigDecimal.mode(BigDecimal::ROUND_MODE))
assert_equal(42, BigDecimal.save_exception_mode { 42 })
end
def test_save_rounding_mode
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_FLOOR)
BigDecimal.save_rounding_mode do
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_EVEN)
end
assert_equal(BigDecimal::ROUND_FLOOR, BigDecimal.mode(BigDecimal::ROUND_MODE))
assert_equal(42, BigDecimal.save_rounding_mode { 42 })
end
def test_save_limit
begin
old = BigDecimal.limit
BigDecimal.limit(100)
BigDecimal.save_limit do
BigDecimal.limit(200)
end
assert_equal(100, BigDecimal.limit);
ensure
BigDecimal.limit(old)
end
assert_equal(42, BigDecimal.save_limit { 42 })
end
def test_exception_nan
_test_mode(BigDecimal::EXCEPTION_NaN) { BigDecimal("NaN") }
end
def test_exception_infinity
_test_mode(BigDecimal::EXCEPTION_INFINITY) { BigDecimal("Infinity") }
end
def test_exception_underflow
_test_mode(BigDecimal::EXCEPTION_UNDERFLOW) do
x = BigDecimal("0.1")
100.times do
x *= x
end
end
end
def test_exception_overflow
_test_mode(BigDecimal::EXCEPTION_OVERFLOW) do
x = BigDecimal("10")
100.times do
x *= x
end
end
end
def test_exception_zerodivide
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
_test_mode(BigDecimal::EXCEPTION_ZERODIVIDE) { 1 / BigDecimal("0") }
_test_mode(BigDecimal::EXCEPTION_ZERODIVIDE) { -1 / BigDecimal("0") }
end
def test_round_up
n4 = BigDecimal("4") # n4 / 9 = 0.44444...
n5 = BigDecimal("5") # n5 / 9 = 0.55555...
n6 = BigDecimal("6") # n6 / 9 = 0.66666...
m4, m5, m6 = -n4, -n5, -n6
n2h = BigDecimal("2.5")
n3h = BigDecimal("3.5")
m2h, m3h = -n2h, -n3h
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_UP)
assert_operator(n4, :<, n4 / 9 * 9)
assert_operator(n5, :<, n5 / 9 * 9)
assert_operator(n6, :<, n6 / 9 * 9)
assert_operator(m4, :>, m4 / 9 * 9)
assert_operator(m5, :>, m5 / 9 * 9)
assert_operator(m6, :>, m6 / 9 * 9)
assert_equal(3, n2h.round)
assert_equal(4, n3h.round)
assert_equal(-3, m2h.round)
assert_equal(-4, m3h.round)
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_DOWN)
assert_operator(n4, :>, n4 / 9 * 9)
assert_operator(n5, :>, n5 / 9 * 9)
assert_operator(n6, :>, n6 / 9 * 9)
assert_operator(m4, :<, m4 / 9 * 9)
assert_operator(m5, :<, m5 / 9 * 9)
assert_operator(m6, :<, m6 / 9 * 9)
assert_equal(2, n2h.round)
assert_equal(3, n3h.round)
assert_equal(-2, m2h.round)
assert_equal(-3, m3h.round)
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_UP)
assert_operator(n4, :>, n4 / 9 * 9)
assert_operator(n5, :<, n5 / 9 * 9)
assert_operator(n6, :<, n6 / 9 * 9)
assert_operator(m4, :<, m4 / 9 * 9)
assert_operator(m5, :>, m5 / 9 * 9)
assert_operator(m6, :>, m6 / 9 * 9)
assert_equal(3, n2h.round)
assert_equal(4, n3h.round)
assert_equal(-3, m2h.round)
assert_equal(-4, m3h.round)
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_DOWN)
assert_operator(n4, :>, n4 / 9 * 9)
assert_operator(n5, :>, n5 / 9 * 9)
assert_operator(n6, :<, n6 / 9 * 9)
assert_operator(m4, :<, m4 / 9 * 9)
assert_operator(m5, :<, m5 / 9 * 9)
assert_operator(m6, :>, m6 / 9 * 9)
assert_equal(2, n2h.round)
assert_equal(3, n3h.round)
assert_equal(-2, m2h.round)
assert_equal(-3, m3h.round)
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_EVEN)
assert_operator(n4, :>, n4 / 9 * 9)
assert_operator(n5, :<, n5 / 9 * 9)
assert_operator(n6, :<, n6 / 9 * 9)
assert_operator(m4, :<, m4 / 9 * 9)
assert_operator(m5, :>, m5 / 9 * 9)
assert_operator(m6, :>, m6 / 9 * 9)
assert_equal(2, n2h.round)
assert_equal(4, n3h.round)
assert_equal(-2, m2h.round)
assert_equal(-4, m3h.round)
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_CEILING)
assert_operator(n4, :<, n4 / 9 * 9)
assert_operator(n5, :<, n5 / 9 * 9)
assert_operator(n6, :<, n6 / 9 * 9)
assert_operator(m4, :<, m4 / 9 * 9)
assert_operator(m5, :<, m5 / 9 * 9)
assert_operator(m6, :<, m6 / 9 * 9)
assert_equal(3, n2h.round)
assert_equal(4, n3h.round)
assert_equal(-2, m2h.round)
assert_equal(-3, m3h.round)
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_FLOOR)
assert_operator(n4, :>, n4 / 9 * 9)
assert_operator(n5, :>, n5 / 9 * 9)
assert_operator(n6, :>, n6 / 9 * 9)
assert_operator(m4, :>, m4 / 9 * 9)
assert_operator(m5, :>, m5 / 9 * 9)
assert_operator(m6, :>, m6 / 9 * 9)
assert_equal(2, n2h.round)
assert_equal(3, n3h.round)
assert_equal(-3, m2h.round)
assert_equal(-4, m3h.round)
end
def test_zero_p
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_equal(true, BigDecimal("0").zero?)
assert_equal(true, BigDecimal("-0").zero?)
assert_equal(false, BigDecimal("1").zero?)
assert_equal(true, BigDecimal("0E200000000000000").zero?)
assert_equal(false, BigDecimal("Infinity").zero?)
assert_equal(false, BigDecimal("-Infinity").zero?)
assert_equal(false, BigDecimal("NaN").zero?)
end
def test_nonzero_p
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_equal(nil, BigDecimal("0").nonzero?)
assert_equal(nil, BigDecimal("-0").nonzero?)
assert_equal(BigDecimal("1"), BigDecimal("1").nonzero?)
assert_positive_infinite(BigDecimal("Infinity").nonzero?)
assert_negative_infinite(BigDecimal("-Infinity").nonzero?)
assert_nan(BigDecimal("NaN").nonzero?)
end
def test_double_fig
assert_kind_of(Integer, BigDecimal.double_fig)
end
def test_cmp
n1 = BigDecimal("1")
n2 = BigDecimal("2")
assert_equal( 0, n1 <=> n1)
assert_equal( 1, n2 <=> n1)
assert_equal(-1, n1 <=> n2)
assert_operator(n1, :==, n1)
assert_operator(n1, :!=, n2)
assert_operator(n1, :<, n2)
assert_operator(n1, :<=, n1)
assert_operator(n1, :<=, n2)
assert_operator(n2, :>, n1)
assert_operator(n2, :>=, n1)
assert_operator(n1, :>=, n1)
assert_operator(BigDecimal("-0"), :==, BigDecimal("0"))
assert_operator(BigDecimal("0"), :<, BigDecimal("1"))
assert_operator(BigDecimal("1"), :>, BigDecimal("0"))
assert_operator(BigDecimal("1"), :>, BigDecimal("-1"))
assert_operator(BigDecimal("-1"), :<, BigDecimal("1"))
assert_operator(BigDecimal((2**100).to_s), :>, BigDecimal("1"))
assert_operator(BigDecimal("1"), :<, BigDecimal((2**100).to_s))
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
inf = BigDecimal("Infinity")
assert_operator(inf, :>, 1)
assert_operator(1, :<, inf)
assert_operator(BigDecimal("1E-1"), :==, 10**(-1), '#4825')
assert_equal(0, BigDecimal("1E-1") <=> 10**(-1), '#4825')
end
def test_cmp_issue9192
bug9192 = '[ruby-core:58756] [#9192]'
operators = { :== => :==, :< => :>, :> => :<, :<= => :>=, :>= => :<= }
5.upto(8) do |i|
s = "706.0#{i}"
d = BigDecimal(s)
f = s.to_f
operators.each do |op, inv|
assert_equal(d.send(op, f), f.send(inv, d),
"(BigDecimal(#{s.inspect}) #{op} #{s}) and (#{s} #{inv} BigDecimal(#{s.inspect})) is different #{bug9192}")
end
end
end
def test_cmp_nan
n1 = BigDecimal("1")
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_equal(nil, BigDecimal("NaN") <=> n1)
assert_equal(false, BigDecimal("NaN") > n1)
assert_equal(nil, BigDecimal("NaN") <=> BigDecimal("NaN"))
assert_equal(false, BigDecimal("NaN") == BigDecimal("NaN"))
end
def test_cmp_failing_coercion
n1 = BigDecimal("1")
assert_equal(nil, n1 <=> nil)
assert_raise(ArgumentError){n1 > nil}
end
def test_cmp_coerce
n1 = BigDecimal("1")
n2 = BigDecimal("2")
o1 = Object.new; def o1.coerce(x); [x, BigDecimal("1")]; end
o2 = Object.new; def o2.coerce(x); [x, BigDecimal("2")]; end
assert_equal( 0, n1 <=> o1)
assert_equal( 1, n2 <=> o1)
assert_equal(-1, n1 <=> o2)
assert_operator(n1, :==, o1)
assert_operator(n1, :!=, o2)
assert_operator(n1, :<, o2)
assert_operator(n1, :<=, o1)
assert_operator(n1, :<=, o2)
assert_operator(n2, :>, o1)
assert_operator(n2, :>=, o1)
assert_operator(n1, :>=, 1)
bug10109 = '[ruby-core:64190]'
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert_operator(BigDecimal(0), :<, Float::INFINITY, bug10109)
assert_operator(Float::INFINITY, :>, BigDecimal(0), bug10109)
end
def test_cmp_bignum
assert_operator(BigDecimal((2**100).to_s), :==, 2**100)
end
def test_cmp_data
d = Time.now; def d.coerce(x); [x, x]; end
assert_operator(BigDecimal((2**100).to_s), :==, d)
end
def test_precs
a = BigDecimal("1").precs
assert_instance_of(Array, a)
assert_equal(2, a.size)
assert_kind_of(Integer, a[0])
assert_kind_of(Integer, a[1])
end
def test_hash
a = []
b = BigDecimal("1")
10.times { a << b *= 10 }
h = {}
a.each_with_index {|x, i| h[x] = i }
a.each_with_index do |x, i|
assert_equal(i, h[x])
end
end
def test_marshal
s = Marshal.dump(BigDecimal("1", 1))
assert_equal(BigDecimal("1", 1), Marshal.load(s))
# corrupt data
s = s.gsub(/BigDecimal.*\z/m) {|x| x.gsub(/\d/m, "-") }
assert_raise(TypeError) { Marshal.load(s) }
end
def test_finite_infinite_nan
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_ZERODIVIDE, false)
x = BigDecimal("0")
assert_equal(true, x.finite?)
assert_equal(nil, x.infinite?)
assert_equal(false, x.nan?)
y = 1 / x
assert_equal(false, y.finite?)
assert_equal(1, y.infinite?)
assert_equal(false, y.nan?)
y = -1 / x
assert_equal(false, y.finite?)
assert_equal(-1, y.infinite?)
assert_equal(false, y.nan?)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
y = 0 / x
assert_equal(false, y.finite?)
assert_equal(nil, y.infinite?)
assert_equal(true, y.nan?)
end
def test_to_i
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
x = BigDecimal("0")
assert_kind_of(Integer, x.to_i)
assert_equal(0, x.to_i)
assert_raise(FloatDomainError){( 1 / x).to_i}
assert_raise(FloatDomainError){(-1 / x).to_i}
assert_raise(FloatDomainError) {( 0 / x).to_i}
x = BigDecimal("1")
assert_equal(1, x.to_i)
x = BigDecimal((2**100).to_s)
assert_equal(2**100, x.to_i)
end
def test_to_f
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
BigDecimal.mode(BigDecimal::EXCEPTION_ZERODIVIDE, false)
x = BigDecimal("0")
assert_instance_of(Float, x.to_f)
assert_equal(0.0, x.to_f)
assert_equal( 1.0 / 0.0, ( 1 / x).to_f)
assert_equal(-1.0 / 0.0, (-1 / x).to_f)
assert_nan(( 0 / x).to_f)
x = BigDecimal("1")
assert_equal(1.0, x.to_f)
x = BigDecimal((2**100).to_s)
assert_equal((2**100).to_f, x.to_f)
x = BigDecimal("1" + "0" * 10000)
assert_equal(0, BigDecimal("-0").to_f)
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, true)
assert_raise(FloatDomainError) { x.to_f }
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
assert_kind_of(Float, x .to_f)
assert_kind_of(Float, (-x).to_f)
bug6944 = '[ruby-core:47342]'
BigDecimal.mode(BigDecimal::EXCEPTION_UNDERFLOW, true)
x = "1e#{Float::MIN_10_EXP - 2*Float::DIG}"
assert_raise(FloatDomainError, x) {BigDecimal(x).to_f}
x = "-#{x}"
assert_raise(FloatDomainError, x) {BigDecimal(x).to_f}
x = "1e#{Float::MIN_10_EXP - Float::DIG}"
assert_nothing_raised(FloatDomainError, x) {
assert_in_delta(0.0, BigDecimal(x).to_f, 10**Float::MIN_10_EXP, bug6944)
}
x = "-#{x}"
assert_nothing_raised(FloatDomainError, x) {
assert_in_delta(0.0, BigDecimal(x).to_f, 10**Float::MIN_10_EXP, bug6944)
}
BigDecimal.mode(BigDecimal::EXCEPTION_UNDERFLOW, false)
x = "1e#{Float::MIN_10_EXP - 2*Float::DIG}"
assert_equal( 0.0, BigDecimal(x).to_f, x)
x = "-#{x}"
assert_equal(-0.0, BigDecimal(x).to_f, x)
x = "1e#{Float::MIN_10_EXP - Float::DIG}"
assert_nothing_raised(FloatDomainError, x) {
assert_in_delta(0.0, BigDecimal(x).to_f, 10**Float::MIN_10_EXP, bug6944)
}
x = "-#{x}"
assert_nothing_raised(FloatDomainError, x) {
assert_in_delta(0.0, BigDecimal(x).to_f, 10**Float::MIN_10_EXP, bug6944)
}
assert_equal( 0.0, BigDecimal( '9e-325').to_f)
assert_equal( 0.0, BigDecimal( '10e-325').to_f)
assert_equal(-0.0, BigDecimal( '-9e-325').to_f)
assert_equal(-0.0, BigDecimal('-10e-325').to_f)
end
def test_to_r
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
x = BigDecimal("0")
assert_kind_of(Rational, x.to_r)
assert_equal(0, x.to_r)
assert_raise(FloatDomainError) {( 1 / x).to_r}
assert_raise(FloatDomainError) {(-1 / x).to_r}
assert_raise(FloatDomainError) {( 0 / x).to_r}
assert_equal(1, BigDecimal("1").to_r)
assert_equal(Rational(3, 2), BigDecimal("1.5").to_r)
assert_equal((2**100).to_r, BigDecimal((2**100).to_s).to_r)
end
def test_coerce
a, b = BigDecimal("1").coerce(1.0)
assert_instance_of(BigDecimal, a)
assert_instance_of(BigDecimal, b)
assert_equal(2, 1 + BigDecimal("1"), '[ruby-core:25697]')
a, b = BigDecimal("1").coerce(1.quo(10))
assert_equal(BigDecimal("0.1"), a, '[ruby-core:34318]')
a, b = BigDecimal("0.11111").coerce(1.quo(3))
assert_equal(BigDecimal("0." + "3"*a.precs[0]), a)
assert_nothing_raised(TypeError, '#7176') do
BigDecimal('1') + Rational(1)
end
end
def test_uplus
x = BigDecimal("1")
assert_equal(x, x.send(:+@))
end
def test_neg
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_equal(BigDecimal("-1"), BigDecimal("1").send(:-@))
assert_equal(BigDecimal("-0"), BigDecimal("0").send(:-@))
assert_equal(BigDecimal("0"), BigDecimal("-0").send(:-@))
assert_equal(BigDecimal("-Infinity"), BigDecimal("Infinity").send(:-@))
assert_equal(BigDecimal("Infinity"), BigDecimal("-Infinity").send(:-@))
assert_equal(true, BigDecimal("NaN").send(:-@).nan?)
end
def test_add
x = BigDecimal("1")
assert_equal(BigDecimal("2"), x + x)
assert_equal(1, BigDecimal("0") + 1)
assert_equal(1, x + 0)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal("0") + 0).sign)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal("-0") + 0).sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, (BigDecimal("-0") + BigDecimal("-0")).sign)
x = BigDecimal((2**100).to_s)
assert_equal(BigDecimal((2**100+1).to_s), x + 1)
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
inf = BigDecimal("Infinity")
neginf = BigDecimal("-Infinity")
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, true)
assert_raise_with_message(FloatDomainError, "Computation results to 'Infinity'") { inf + inf }
assert_raise_with_message(FloatDomainError, "Computation results to '-Infinity'") { neginf + neginf }
end
def test_sub
x = BigDecimal("1")
assert_equal(BigDecimal("0"), x - x)
assert_equal(-1, BigDecimal("0") - 1)
assert_equal(1, x - 0)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal("0") - 0).sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, (BigDecimal("-0") - 0).sign)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal("-0") - BigDecimal("-0")).sign)
x = BigDecimal((2**100).to_s)
assert_equal(BigDecimal((2**100-1).to_s), x - 1)
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
inf = BigDecimal("Infinity")
neginf = BigDecimal("-Infinity")
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, true)
assert_raise_with_message(FloatDomainError, "Computation results to 'Infinity'") { inf - neginf }
assert_raise_with_message(FloatDomainError, "Computation results to '-Infinity'") { neginf - inf }
end
def test_sub_with_float
assert_kind_of(BigDecimal, BigDecimal("3") - 1.0)
end
def test_sub_with_rational
assert_kind_of(BigDecimal, BigDecimal("3") - 1.quo(3))
end
def test_mult
x = BigDecimal((2**100).to_s)
assert_equal(BigDecimal((2**100 * 3).to_s), (x * 3).to_i)
assert_equal(x, (x * 1).to_i)
assert_equal(x, (BigDecimal("1") * x).to_i)
assert_equal(BigDecimal((2**200).to_s), (x * x).to_i)
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
inf = BigDecimal("Infinity")
neginf = BigDecimal("-Infinity")
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, true)
assert_raise_with_message(FloatDomainError, "Computation results to 'Infinity'") { inf * inf }
assert_raise_with_message(FloatDomainError, "Computation results to '-Infinity'") { neginf * inf }
end
def test_mult_with_float
assert_kind_of(BigDecimal, BigDecimal("3") * 1.5)
end
def test_mult_with_rational
assert_kind_of(BigDecimal, BigDecimal("3") * 1.quo(3))
end
def test_mult_with_nil
assert_raise(TypeError) {
BigDecimal('1.1') * nil
}
end
def test_div
x = BigDecimal((2**100).to_s)
assert_equal(BigDecimal((2**100 / 3).to_s), (x / 3).to_i)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal("0") / 1).sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, (BigDecimal("-0") / 1).sign)
assert_equal(2, BigDecimal("2") / 1)
assert_equal(-2, BigDecimal("2") / -1)
assert_equal(BigDecimal('1486.868686869'), BigDecimal('1472.0') / BigDecimal('0.99'), '[ruby-core:59365] [#9316]')
assert_equal(4.124045235, BigDecimal('0.9932') / (700 * BigDecimal('0.344045') / BigDecimal('1000.0')), '[#9305]')
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert_positive_zero(BigDecimal("1.0") / BigDecimal("Infinity"))
assert_negative_zero(BigDecimal("-1.0") / BigDecimal("Infinity"))
assert_negative_zero(BigDecimal("1.0") / BigDecimal("-Infinity"))
assert_positive_zero(BigDecimal("-1.0") / BigDecimal("-Infinity"))
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, true)
BigDecimal.mode(BigDecimal::EXCEPTION_ZERODIVIDE, false)
assert_raise_with_message(FloatDomainError, "Computation results to 'Infinity'") { BigDecimal("1") / 0 }
assert_raise_with_message(FloatDomainError, "Computation results to '-Infinity'") { BigDecimal("-1") / 0 }
end
def test_div_with_float
assert_kind_of(BigDecimal, BigDecimal("3") / 1.5)
end
def test_div_with_rational
assert_kind_of(BigDecimal, BigDecimal("3") / 1.quo(3))
end
def test_mod
x = BigDecimal((2**100).to_s)
assert_equal(1, x % 3)
assert_equal(2, (-x) % 3)
assert_equal(-2, x % -3)
assert_equal(-1, (-x) % -3)
end
def test_mod_with_float
assert_kind_of(BigDecimal, BigDecimal("3") % 1.5)
end
def test_mod_with_rational
assert_kind_of(BigDecimal, BigDecimal("3") % 1.quo(3))
end
def test_remainder
x = BigDecimal((2**100).to_s)
assert_equal(1, x.remainder(3))
assert_equal(-1, (-x).remainder(3))
assert_equal(1, x.remainder(-3))
assert_equal(-1, (-x).remainder(-3))
end
def test_remainder_with_float
assert_kind_of(BigDecimal, BigDecimal("3").remainder(1.5))
end
def test_remainder_with_rational
assert_kind_of(BigDecimal, BigDecimal("3").remainder(1.quo(3)))
end
def test_divmod
x = BigDecimal((2**100).to_s)
assert_equal([(x / 3).floor, 1], x.divmod(3))
assert_equal([(-x / 3).floor, 2], (-x).divmod(3))
assert_equal([0, 0], BigDecimal("0").divmod(2))
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_raise(ZeroDivisionError){BigDecimal("0").divmod(0)}
end
def test_add_bigdecimal
x = BigDecimal((2**100).to_s)
assert_equal(3000000000000000000000000000000, x.add(x, 1))
assert_equal(2500000000000000000000000000000, x.add(x, 2))
assert_equal(2540000000000000000000000000000, x.add(x, 3))
end
def test_sub_bigdecimal
x = BigDecimal((2**100).to_s)
assert_equal(1000000000000000000000000000000, x.sub(1, 1))
assert_equal(1300000000000000000000000000000, x.sub(1, 2))
assert_equal(1270000000000000000000000000000, x.sub(1, 3))
end
def test_mult_bigdecimal
x = BigDecimal((2**100).to_s)
assert_equal(4000000000000000000000000000000, x.mult(3, 1))
assert_equal(3800000000000000000000000000000, x.mult(3, 2))
assert_equal(3800000000000000000000000000000, x.mult(3, 3))
end
def test_div_bigdecimal
x = BigDecimal((2**100).to_s)
assert_equal(422550200076076467165567735125, x.div(3))
assert_equal(400000000000000000000000000000, x.div(3, 1))
assert_equal(420000000000000000000000000000, x.div(3, 2))
assert_equal(423000000000000000000000000000, x.div(3, 3))
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert_equal(0, BigDecimal("0").div(BigDecimal("Infinity")))
end
end
def test_abs_bigdecimal
x = BigDecimal((2**100).to_s)
assert_equal(1267650600228229401496703205376, x.abs)
x = BigDecimal("-" + (2**100).to_s)
assert_equal(1267650600228229401496703205376, x.abs)
x = BigDecimal("0")
assert_equal(0, x.abs)
x = BigDecimal("-0")
assert_equal(0, x.abs)
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
x = BigDecimal("Infinity")
assert_equal(BigDecimal("Infinity"), x.abs)
x = BigDecimal("-Infinity")
assert_equal(BigDecimal("Infinity"), x.abs)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
x = BigDecimal("NaN")
assert_nan(x.abs)
end
def test_sqrt_bigdecimal
x = BigDecimal("0.09")
assert_in_delta(0.3, x.sqrt(1), 0.001)
x = BigDecimal((2**100).to_s)
y = BigDecimal("1125899906842624")
e = y.exponent
assert_equal(true, (x.sqrt(100) - y).abs < BigDecimal("1E#{e-100}"))
assert_equal(true, (x.sqrt(200) - y).abs < BigDecimal("1E#{e-200}"))
assert_equal(true, (x.sqrt(300) - y).abs < BigDecimal("1E#{e-300}"))
x = BigDecimal("-" + (2**100).to_s)
assert_raise_with_message(FloatDomainError, "sqrt of negative value") { x.sqrt(1) }
x = BigDecimal((2**200).to_s)
assert_equal(2**100, x.sqrt(1))
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_raise_with_message(FloatDomainError, "sqrt of 'NaN'(Not a Number)") { BigDecimal("NaN").sqrt(1) }
assert_raise_with_message(FloatDomainError, "sqrt of negative value") { BigDecimal("-Infinity").sqrt(1) }
assert_equal(0, BigDecimal("0").sqrt(1))
assert_equal(0, BigDecimal("-0").sqrt(1))
assert_equal(1, BigDecimal("1").sqrt(1))
assert_positive_infinite(BigDecimal("Infinity").sqrt(1))
end
def test_sqrt_5266
x = BigDecimal('2' + '0'*100)
assert_equal('0.14142135623730950488016887242096980785696718753769480731',
x.sqrt(56).to_s(56).split(' ')[0])
assert_equal('0.1414213562373095048801688724209698078569671875376948073',
x.sqrt(55).to_s(55).split(' ')[0])
x = BigDecimal('2' + '0'*200)
assert_equal('0.14142135623730950488016887242096980785696718753769480731766797379907324784621070388503875343276415727350138462',
x.sqrt(110).to_s(110).split(' ')[0])
assert_equal('0.1414213562373095048801688724209698078569671875376948073176679737990732478462107038850387534327641572735013846',
x.sqrt(109).to_s(109).split(' ')[0])
end
def test_fix
x = BigDecimal("1.1")
assert_equal(1, x.fix)
assert_kind_of(BigDecimal, x.fix)
end
def test_frac
x = BigDecimal("1.1")
assert_equal(0.1, x.frac)
assert_equal(0.1, BigDecimal("0.1").frac)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_nan(BigDecimal("NaN").frac)
end
def test_round
assert_equal(3, BigDecimal("3.14159").round)
assert_equal(9, BigDecimal("8.7").round)
assert_equal(3.142, BigDecimal("3.14159").round(3))
assert_equal(13300.0, BigDecimal("13345.234").round(-2))
x = BigDecimal("111.111")
assert_equal(111 , x.round)
assert_equal(111.1 , x.round(1))
assert_equal(111.11 , x.round(2))
assert_equal(111.111, x.round(3))
assert_equal(111.111, x.round(4))
assert_equal(110 , x.round(-1))
assert_equal(100 , x.round(-2))
assert_equal( 0 , x.round(-3))
assert_equal( 0 , x.round(-4))
x = BigDecimal("2.5")
assert_equal(3, x.round(0, BigDecimal::ROUND_UP))
assert_equal(2, x.round(0, BigDecimal::ROUND_DOWN))
assert_equal(3, x.round(0, BigDecimal::ROUND_HALF_UP))
assert_equal(2, x.round(0, BigDecimal::ROUND_HALF_DOWN))
assert_equal(2, x.round(0, BigDecimal::ROUND_HALF_EVEN))
assert_equal(3, x.round(0, BigDecimal::ROUND_CEILING))
assert_equal(2, x.round(0, BigDecimal::ROUND_FLOOR))
assert_raise(ArgumentError) { x.round(0, 256) }
x = BigDecimal("-2.5")
assert_equal(-3, x.round(0, BigDecimal::ROUND_UP))
assert_equal(-2, x.round(0, BigDecimal::ROUND_DOWN))
assert_equal(-3, x.round(0, BigDecimal::ROUND_HALF_UP))
assert_equal(-2, x.round(0, BigDecimal::ROUND_HALF_DOWN))
assert_equal(-2, x.round(0, BigDecimal::ROUND_HALF_EVEN))
assert_equal(-2, x.round(0, BigDecimal::ROUND_CEILING))
assert_equal(-3, x.round(0, BigDecimal::ROUND_FLOOR))
ROUNDING_MODE_MAP.each do |const, sym|
assert_equal(x.round(0, const), x.round(0, sym))
end
bug3803 = '[ruby-core:32136]'
15.times do |n|
x = BigDecimal("5#{'0'*n}1")
assert_equal(10**(n+2), x.round(-(n+2), BigDecimal::ROUND_HALF_DOWN), bug3803)
assert_equal(10**(n+2), x.round(-(n+2), BigDecimal::ROUND_HALF_EVEN), bug3803)
x = BigDecimal("0.5#{'0'*n}1")
assert_equal(1, x.round(0, BigDecimal::ROUND_HALF_DOWN), bug3803)
assert_equal(1, x.round(0, BigDecimal::ROUND_HALF_EVEN), bug3803)
x = BigDecimal("-0.5#{'0'*n}1")
assert_equal(-1, x.round(0, BigDecimal::ROUND_HALF_DOWN), bug3803)
assert_equal(-1, x.round(0, BigDecimal::ROUND_HALF_EVEN), bug3803)
end
end
def test_round_half_even
assert_equal(BigDecimal('12.0'), BigDecimal('12.5').round(half: :even))
assert_equal(BigDecimal('14.0'), BigDecimal('13.5').round(half: :even))
assert_equal(BigDecimal('2.2'), BigDecimal('2.15').round(1, half: :even))
assert_equal(BigDecimal('2.2'), BigDecimal('2.25').round(1, half: :even))
assert_equal(BigDecimal('2.4'), BigDecimal('2.35').round(1, half: :even))
assert_equal(BigDecimal('-2.2'), BigDecimal('-2.15').round(1, half: :even))
assert_equal(BigDecimal('-2.2'), BigDecimal('-2.25').round(1, half: :even))
assert_equal(BigDecimal('-2.4'), BigDecimal('-2.35').round(1, half: :even))
assert_equal(BigDecimal('7.1364'), BigDecimal('7.13645').round(4, half: :even))
assert_equal(BigDecimal('7.1365'), BigDecimal('7.1364501').round(4, half: :even))
assert_equal(BigDecimal('7.1364'), BigDecimal('7.1364499').round(4, half: :even))
assert_equal(BigDecimal('-7.1364'), BigDecimal('-7.13645').round(4, half: :even))
assert_equal(BigDecimal('-7.1365'), BigDecimal('-7.1364501').round(4, half: :even))
assert_equal(BigDecimal('-7.1364'), BigDecimal('-7.1364499').round(4, half: :even))
end
def test_round_half_up
assert_equal(BigDecimal('13.0'), BigDecimal('12.5').round(half: :up))
assert_equal(BigDecimal('14.0'), BigDecimal('13.5').round(half: :up))
assert_equal(BigDecimal('2.2'), BigDecimal('2.15').round(1, half: :up))
assert_equal(BigDecimal('2.3'), BigDecimal('2.25').round(1, half: :up))
assert_equal(BigDecimal('2.4'), BigDecimal('2.35').round(1, half: :up))
assert_equal(BigDecimal('-2.2'), BigDecimal('-2.15').round(1, half: :up))
assert_equal(BigDecimal('-2.3'), BigDecimal('-2.25').round(1, half: :up))
assert_equal(BigDecimal('-2.4'), BigDecimal('-2.35').round(1, half: :up))
assert_equal(BigDecimal('7.1365'), BigDecimal('7.13645').round(4, half: :up))
assert_equal(BigDecimal('7.1365'), BigDecimal('7.1364501').round(4, half: :up))
assert_equal(BigDecimal('7.1364'), BigDecimal('7.1364499').round(4, half: :up))
assert_equal(BigDecimal('-7.1365'), BigDecimal('-7.13645').round(4, half: :up))
assert_equal(BigDecimal('-7.1365'), BigDecimal('-7.1364501').round(4, half: :up))
assert_equal(BigDecimal('-7.1364'), BigDecimal('-7.1364499').round(4, half: :up))
end
def test_round_half_down
assert_equal(BigDecimal('12.0'), BigDecimal('12.5').round(half: :down))
assert_equal(BigDecimal('13.0'), BigDecimal('13.5').round(half: :down))
assert_equal(BigDecimal('2.1'), BigDecimal('2.15').round(1, half: :down))
assert_equal(BigDecimal('2.2'), BigDecimal('2.25').round(1, half: :down))
assert_equal(BigDecimal('2.3'), BigDecimal('2.35').round(1, half: :down))
assert_equal(BigDecimal('-2.1'), BigDecimal('-2.15').round(1, half: :down))
assert_equal(BigDecimal('-2.2'), BigDecimal('-2.25').round(1, half: :down))
assert_equal(BigDecimal('-2.3'), BigDecimal('-2.35').round(1, half: :down))
assert_equal(BigDecimal('7.1364'), BigDecimal('7.13645').round(4, half: :down))
assert_equal(BigDecimal('7.1365'), BigDecimal('7.1364501').round(4, half: :down))
assert_equal(BigDecimal('7.1364'), BigDecimal('7.1364499').round(4, half: :down))
assert_equal(BigDecimal('-7.1364'), BigDecimal('-7.13645').round(4, half: :down))
assert_equal(BigDecimal('-7.1365'), BigDecimal('-7.1364501').round(4, half: :down))
assert_equal(BigDecimal('-7.1364'), BigDecimal('-7.1364499').round(4, half: :down))
end
def test_round_half_nil
x = BigDecimal("2.5")
BigDecimal.save_rounding_mode do
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_UP)
assert_equal(3, x.round(0, half: nil))
end
BigDecimal.save_rounding_mode do
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_DOWN)
assert_equal(2, x.round(0, half: nil))
end
BigDecimal.save_rounding_mode do
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_UP)
assert_equal(3, x.round(0, half: nil))
end
BigDecimal.save_rounding_mode do
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_DOWN)
assert_equal(2, x.round(0, half: nil))
end
BigDecimal.save_rounding_mode do
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_EVEN)
assert_equal(2, x.round(0, half: nil))
end
BigDecimal.save_rounding_mode do
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_CEILING)
assert_equal(3, x.round(0, half: nil))
end
BigDecimal.save_rounding_mode do
BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_FLOOR)
assert_equal(2, x.round(0, half: nil))
end
end
def test_round_half_invalid_option
assert_raise_with_message(ArgumentError, "invalid rounding mode: invalid") { BigDecimal('12.5').round(half: :invalid) }
assert_raise_with_message(ArgumentError, "invalid rounding mode: invalid") { BigDecimal('2.15').round(1, half: :invalid) }
end
def test_truncate
assert_equal(3, BigDecimal("3.14159").truncate)
assert_equal(8, BigDecimal("8.7").truncate)
assert_equal(3.141, BigDecimal("3.14159").truncate(3))
assert_equal(13300.0, BigDecimal("13345.234").truncate(-2))
assert_equal(-3, BigDecimal("-3.14159").truncate)
assert_equal(-8, BigDecimal("-8.7").truncate)
assert_equal(-3.141, BigDecimal("-3.14159").truncate(3))
assert_equal(-13300.0, BigDecimal("-13345.234").truncate(-2))
end
def test_floor
assert_equal(3, BigDecimal("3.14159").floor)
assert_equal(-10, BigDecimal("-9.1").floor)
assert_equal(3.141, BigDecimal("3.14159").floor(3))
assert_equal(13300.0, BigDecimal("13345.234").floor(-2))
end
def test_ceil
assert_equal(4, BigDecimal("3.14159").ceil)
assert_equal(-9, BigDecimal("-9.1").ceil)
assert_equal(3.142, BigDecimal("3.14159").ceil(3))
assert_equal(13400.0, BigDecimal("13345.234").ceil(-2))
end
def test_to_s
assert_equal('-123.45678 90123 45678 9', BigDecimal('-123.45678901234567890').to_s('5F'))
assert_equal('+123.45678901 23456789', BigDecimal('123.45678901234567890').to_s('+8F'))
assert_equal(' 123.4567890123456789', BigDecimal('123.45678901234567890').to_s(' F'))
assert_equal('0.1234567890123456789e3', BigDecimal('123.45678901234567890').to_s)
assert_equal('0.12345 67890 12345 6789e3', BigDecimal('123.45678901234567890').to_s(5))
end
def test_split
x = BigDecimal('-123.45678901234567890')
assert_equal([-1, "1234567890123456789", 10, 3], x.split)
assert_equal([1, "0", 10, 0], BigDecimal("0").split)
assert_equal([-1, "0", 10, 0], BigDecimal("-0").split)
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_equal([0, "NaN", 10, 0], BigDecimal("NaN").split)
assert_equal([1, "Infinity", 10, 0], BigDecimal("Infinity").split)
assert_equal([-1, "Infinity", 10, 0], BigDecimal("-Infinity").split)
end
def test_exponent
x = BigDecimal('-123.45678901234567890')
assert_equal(3, x.exponent)
end
def test_inspect
assert_equal("0.123456789012e0", BigDecimal("0.123456789012").inspect)
assert_equal("0.123456789012e4", BigDecimal("1234.56789012").inspect)
assert_equal("0.123456789012e-4", BigDecimal("0.0000123456789012").inspect)
end
def test_power
assert_nothing_raised(TypeError, '[ruby-core:47632]') do
1000.times { BigDecimal('1001.10')**0.75 }
end
end
def test_power_with_nil
assert_raise(TypeError) do
BigDecimal(3) ** nil
end
end
def test_power_of_nan
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_nan(BigDecimal::NAN ** 0)
assert_nan(BigDecimal::NAN ** 1)
assert_nan(BigDecimal::NAN ** 42)
assert_nan(BigDecimal::NAN ** -42)
assert_nan(BigDecimal::NAN ** 42.0)
assert_nan(BigDecimal::NAN ** -42.0)
assert_nan(BigDecimal::NAN ** BigDecimal(42))
assert_nan(BigDecimal::NAN ** BigDecimal(-42))
assert_nan(BigDecimal::NAN ** BigDecimal::INFINITY)
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert_nan(BigDecimal::NAN ** (-BigDecimal::INFINITY))
end
end
end
def test_power_with_Bignum
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert_equal(0, BigDecimal(0) ** (2**100))
assert_positive_infinite(BigDecimal(0) ** -(2**100))
assert_positive_infinite((-BigDecimal(0)) ** -(2**100))
assert_negative_infinite((-BigDecimal(0)) ** -(2**100 + 1))
assert_equal(1, BigDecimal(1) ** (2**100))
assert_positive_infinite(BigDecimal(3) ** (2**100))
assert_positive_zero(BigDecimal(3) ** (-2**100))
assert_negative_infinite(BigDecimal(-3) ** (2**100))
assert_positive_infinite(BigDecimal(-3) ** (2**100 + 1))
assert_negative_zero(BigDecimal(-3) ** (-2**100))
assert_positive_zero(BigDecimal(-3) ** (-2**100 - 1))
assert_positive_zero(BigDecimal(0.5, Float::DIG) ** (2**100))
assert_positive_infinite(BigDecimal(0.5, Float::DIG) ** (-2**100))
assert_negative_zero(BigDecimal(-0.5, Float::DIG) ** (2**100))
assert_positive_zero(BigDecimal(-0.5, Float::DIG) ** (2**100 - 1))
assert_negative_infinite(BigDecimal(-0.5, Float::DIG) ** (-2**100))
assert_positive_infinite(BigDecimal(-0.5, Float::DIG) ** (-2**100 - 1))
end
end
def test_power_with_BigDecimal
assert_nothing_raised do
assert_in_delta(3 ** 3, BigDecimal(3) ** BigDecimal(3))
end
end
def test_power_of_finite_with_zero
x = BigDecimal(1)
assert_equal(1, x ** 0)
assert_equal(1, x ** 0.quo(1))
assert_equal(1, x ** 0.0)
assert_equal(1, x ** BigDecimal(0))
x = BigDecimal(42)
assert_equal(1, x ** 0)
assert_equal(1, x ** 0.quo(1))
assert_equal(1, x ** 0.0)
assert_equal(1, x ** BigDecimal(0))
x = BigDecimal(-42)
assert_equal(1, x ** 0)
assert_equal(1, x ** 0.quo(1))
assert_equal(1, x ** 0.0)
assert_equal(1, x ** BigDecimal(0))
end
def test_power_of_three
x = BigDecimal(3)
assert_equal(81, x ** 4)
assert_equal(1.quo(81), x ** -4)
assert_in_delta(1.0/81, x ** -4)
end
def test_power_of_zero
zero = BigDecimal(0)
assert_equal(0, zero ** 4)
assert_equal(0, zero ** 4.quo(1))
assert_equal(0, zero ** 4.0)
assert_equal(0, zero ** BigDecimal(4))
assert_equal(1, zero ** 0)
assert_equal(1, zero ** 0.quo(1))
assert_equal(1, zero ** 0.0)
assert_equal(1, zero ** BigDecimal(0))
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
assert_positive_infinite(zero ** -1)
assert_positive_infinite(zero ** -1.quo(1))
assert_positive_infinite(zero ** -1.0)
assert_positive_infinite(zero ** BigDecimal(-1))
m_zero = BigDecimal("-0")
assert_negative_infinite(m_zero ** -1)
assert_negative_infinite(m_zero ** -1.quo(1))
assert_negative_infinite(m_zero ** -1.0)
assert_negative_infinite(m_zero ** BigDecimal(-1))
assert_positive_infinite(m_zero ** -2)
assert_positive_infinite(m_zero ** -2.quo(1))
assert_positive_infinite(m_zero ** -2.0)
assert_positive_infinite(m_zero ** BigDecimal(-2))
end
end
def test_power_of_positive_infinity
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
assert_positive_infinite(BigDecimal::INFINITY ** 3)
assert_positive_infinite(BigDecimal::INFINITY ** 3.quo(1))
assert_positive_infinite(BigDecimal::INFINITY ** 3.0)
assert_positive_infinite(BigDecimal::INFINITY ** BigDecimal(3))
assert_positive_infinite(BigDecimal::INFINITY ** 2)
assert_positive_infinite(BigDecimal::INFINITY ** 2.quo(1))
assert_positive_infinite(BigDecimal::INFINITY ** 2.0)
assert_positive_infinite(BigDecimal::INFINITY ** BigDecimal(2))
assert_positive_infinite(BigDecimal::INFINITY ** 1)
assert_positive_infinite(BigDecimal::INFINITY ** 1.quo(1))
assert_positive_infinite(BigDecimal::INFINITY ** 1.0)
assert_positive_infinite(BigDecimal::INFINITY ** BigDecimal(1))
assert_equal(1, BigDecimal::INFINITY ** 0)
assert_equal(1, BigDecimal::INFINITY ** 0.quo(1))
assert_equal(1, BigDecimal::INFINITY ** 0.0)
assert_equal(1, BigDecimal::INFINITY ** BigDecimal(0))
assert_positive_zero(BigDecimal::INFINITY ** -1)
assert_positive_zero(BigDecimal::INFINITY ** -1.quo(1))
assert_positive_zero(BigDecimal::INFINITY ** -1.0)
assert_positive_zero(BigDecimal::INFINITY ** BigDecimal(-1))
assert_positive_zero(BigDecimal::INFINITY ** -2)
assert_positive_zero(BigDecimal::INFINITY ** -2.0)
assert_positive_zero(BigDecimal::INFINITY ** BigDecimal(-2))
end
end
def test_power_of_negative_infinity
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
assert_negative_infinite((-BigDecimal::INFINITY) ** 3)
assert_negative_infinite((-BigDecimal::INFINITY) ** 3.quo(1))
assert_negative_infinite((-BigDecimal::INFINITY) ** 3.0)
assert_negative_infinite((-BigDecimal::INFINITY) ** BigDecimal(3))
assert_positive_infinite((-BigDecimal::INFINITY) ** 2)
assert_positive_infinite((-BigDecimal::INFINITY) ** 2.quo(1))
assert_positive_infinite((-BigDecimal::INFINITY) ** 2.0)
assert_positive_infinite((-BigDecimal::INFINITY) ** BigDecimal(2))
assert_negative_infinite((-BigDecimal::INFINITY) ** 1)
assert_negative_infinite((-BigDecimal::INFINITY) ** 1.quo(1))
assert_negative_infinite((-BigDecimal::INFINITY) ** 1.0)
assert_negative_infinite((-BigDecimal::INFINITY) ** BigDecimal(1))
assert_equal(1, (-BigDecimal::INFINITY) ** 0)
assert_equal(1, (-BigDecimal::INFINITY) ** 0.quo(1))
assert_equal(1, (-BigDecimal::INFINITY) ** 0.0)
assert_equal(1, (-BigDecimal::INFINITY) ** BigDecimal(0))
assert_negative_zero((-BigDecimal::INFINITY) ** -1)
assert_negative_zero((-BigDecimal::INFINITY) ** -1.quo(1))
assert_negative_zero((-BigDecimal::INFINITY) ** -1.0)
assert_negative_zero((-BigDecimal::INFINITY) ** BigDecimal(-1))
assert_positive_zero((-BigDecimal::INFINITY) ** -2)
assert_positive_zero((-BigDecimal::INFINITY) ** -2.quo(1))
assert_positive_zero((-BigDecimal::INFINITY) ** -2.0)
assert_positive_zero((-BigDecimal::INFINITY) ** BigDecimal(-2))
end
end
def test_power_without_prec
pi = BigDecimal("3.14159265358979323846264338327950288419716939937511")
e = BigDecimal("2.71828182845904523536028747135266249775724709369996")
pow = BigDecimal("22.4591577183610454734271522045437350275893151339967843873233068")
assert_equal(pow, pi.power(e))
end
def test_power_with_prec
pi = BigDecimal("3.14159265358979323846264338327950288419716939937511")
e = BigDecimal("2.71828182845904523536028747135266249775724709369996")
pow = BigDecimal("22.459157718361045473")
assert_equal(pow, pi.power(e, 20))
b = BigDecimal('1.034482758620689655172413793103448275862068965517241379310344827586206896551724')
assert_equal(BigDecimal('0.114523E1'), b.power(4, 5), '[Bug #8818] [ruby-core:56802]')
end
def test_limit
BigDecimal.limit(1)
x = BigDecimal("3")
assert_equal(90, x ** 4) # OK? must it be 80?
# 3 * 3 * 3 * 3 = 10 * 3 * 3 = 30 * 3 = 90 ???
assert_raise(ArgumentError) { BigDecimal.limit(-1) }
bug7458 = '[ruby-core:50269] [#7458]'
one = BigDecimal('1')
epsilon = BigDecimal('0.7E-18')
BigDecimal.save_limit do
BigDecimal.limit(0)
assert_equal(BigDecimal("1.0000000000000000007"), one + epsilon, "limit(0) #{bug7458}")
1.upto(18) do |lim|
BigDecimal.limit(lim)
assert_equal(BigDecimal("1.0"), one + epsilon, "limit(#{lim}) #{bug7458}")
end
BigDecimal.limit(19)
assert_equal(BigDecimal("1.000000000000000001"), one + epsilon, "limit(19) #{bug7458}")
BigDecimal.limit(20)
assert_equal(BigDecimal("1.0000000000000000007"), one + epsilon, "limit(20) #{bug7458}")
end
end
def test_sign
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
BigDecimal.mode(BigDecimal::EXCEPTION_ZERODIVIDE, false)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, BigDecimal("0").sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, BigDecimal("-0").sign)
assert_equal(BigDecimal::SIGN_POSITIVE_FINITE, BigDecimal("1").sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_FINITE, BigDecimal("-1").sign)
assert_equal(BigDecimal::SIGN_POSITIVE_INFINITE, (BigDecimal("1") / 0).sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_INFINITE, (BigDecimal("-1") / 0).sign)
assert_equal(BigDecimal::SIGN_NaN, (BigDecimal("0") / 0).sign)
end
def test_inf
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
inf = BigDecimal("Infinity")
assert_equal(inf, inf + inf)
assert_nan((inf + (-inf)))
assert_nan((inf - inf))
assert_equal(inf, inf - (-inf))
assert_equal(inf, inf * inf)
assert_nan((inf / inf))
assert_equal(inf, inf + 1)
assert_equal(inf, inf - 1)
assert_equal(inf, inf * 1)
assert_nan((inf * 0))
assert_equal(inf, inf / 1)
assert_equal(inf, 1 + inf)
assert_equal(-inf, 1 - inf)
assert_equal(inf, 1 * inf)
assert_equal(-inf, -1 * inf)
assert_nan((0 * inf))
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (1 / inf).sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, (-1 / inf).sign)
end
def test_to_special_string
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
nan = BigDecimal("NaN")
assert_equal("NaN", nan.to_s)
inf = BigDecimal("Infinity")
assert_equal("Infinity", inf.to_s)
assert_equal(" Infinity", inf.to_s(" "))
assert_equal("+Infinity", inf.to_s("+"))
assert_equal("-Infinity", (-inf).to_s)
pzero = BigDecimal("0")
assert_equal("0.0", pzero.to_s)
assert_equal(" 0.0", pzero.to_s(" "))
assert_equal("+0.0", pzero.to_s("+"))
assert_equal("-0.0", (-pzero).to_s)
end
def test_to_string
assert_equal("0.01", BigDecimal("0.01").to_s("F"))
s = "0." + "0" * 100 + "1"
assert_equal(s, BigDecimal(s).to_s("F"))
s = "1" + "0" * 100 + ".0"
assert_equal(s, BigDecimal(s).to_s("F"))
end
def test_ctov
assert_equal(0.1, BigDecimal("1E-1"))
assert_equal(10, BigDecimal("1E+1"))
assert_equal(1, BigDecimal("+1"))
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
assert_equal(BigDecimal::SIGN_POSITIVE_INFINITE, BigDecimal("1E1" + "0" * 10000).sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_INFINITE, BigDecimal("-1E1" + "0" * 10000).sign)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, BigDecimal("1E-1" + "0" * 10000).sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, BigDecimal("-1E-1" + "0" * 10000).sign)
end
def test_split_under_gc_stress
bug3258 = '[ruby-dev:41213]'
expect = 10.upto(20).map{|i|[1, "1", 10, i+1].inspect}
assert_in_out_err(%w[-rbigdecimal --disable-gems], <<-EOS, expect, [], bug3258)
GC.stress = true
10.upto(20) do |i|
p BigDecimal("1"+"0"*i).split
end
EOS
end
def test_coerce_under_gc_stress
assert_in_out_err(%w[-rbigdecimal --disable-gems], <<-EOS, [], [])
expect = ":too_long_to_embed_as_string can't be coerced into BigDecimal"
b = BigDecimal("1")
GC.stress = true
10.times do
begin
b.coerce(:too_long_to_embed_as_string)
rescue => e
raise unless e.is_a?(TypeError)
raise "'\#{expect}' is expected, but '\#{e.message}'" unless e.message == expect
end
end
EOS
end
def test_INFINITY
assert_positive_infinite(BigDecimal::INFINITY)
end
def test_NAN
assert_nan(BigDecimal::NAN)
end
def test_exp_with_zero_precision
assert_raise(ArgumentError) do
BigMath.exp(1, 0)
end
end
def test_exp_with_negative_precision
assert_raise(ArgumentError) do
BigMath.exp(1, -42)
end
end
def test_exp_with_complex
assert_raise(ArgumentError) do
BigMath.exp(Complex(1, 2), 20)
end
end
def test_exp_with_negative_infinite
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert_equal(0, BigMath.exp(-BigDecimal::INFINITY, 20))
end
end
def test_exp_with_positive_infinite
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert(BigMath.exp(BigDecimal::INFINITY, 20) > 0)
assert_positive_infinite(BigMath.exp(BigDecimal::INFINITY, 20))
end
end
def test_exp_with_nan
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_nan(BigMath.exp(BigDecimal::NAN, 20))
end
end
def test_exp_with_1
assert_in_epsilon(Math::E, BigMath.exp(1, 20))
end
def test_BigMath_exp
prec = 20
assert_in_epsilon(Math.exp(20), BigMath.exp(BigDecimal("20"), prec))
assert_in_epsilon(Math.exp(40), BigMath.exp(BigDecimal("40"), prec))
assert_in_epsilon(Math.exp(-20), BigMath.exp(BigDecimal("-20"), prec))
assert_in_epsilon(Math.exp(-40), BigMath.exp(BigDecimal("-40"), prec))
end
def test_BigMath_exp_with_float
prec = 20
assert_in_epsilon(Math.exp(20), BigMath.exp(20.0, prec))
assert_in_epsilon(Math.exp(40), BigMath.exp(40.0, prec))
assert_in_epsilon(Math.exp(-20), BigMath.exp(-20.0, prec))
assert_in_epsilon(Math.exp(-40), BigMath.exp(-40.0, prec))
end
def test_BigMath_exp_with_fixnum
prec = 20
assert_in_epsilon(Math.exp(20), BigMath.exp(20, prec))
assert_in_epsilon(Math.exp(40), BigMath.exp(40, prec))
assert_in_epsilon(Math.exp(-20), BigMath.exp(-20, prec))
assert_in_epsilon(Math.exp(-40), BigMath.exp(-40, prec))
end
def test_BigMath_exp_with_rational
prec = 20
assert_in_epsilon(Math.exp(20), BigMath.exp(Rational(40,2), prec))
assert_in_epsilon(Math.exp(40), BigMath.exp(Rational(80,2), prec))
assert_in_epsilon(Math.exp(-20), BigMath.exp(Rational(-40,2), prec))
assert_in_epsilon(Math.exp(-40), BigMath.exp(Rational(-80,2), prec))
end
def test_BigMath_exp_under_gc_stress
assert_in_out_err(%w[-rbigdecimal --disable-gems], <<-EOS, [], [])
expect = ":too_long_to_embed_as_string can't be coerced into BigDecimal"
10.times do
begin
BigMath.exp(:too_long_to_embed_as_string, 6)
rescue => e
raise unless e.is_a?(ArgumentError)
raise "'\#{expect}' is expected, but '\#{e.message}'" unless e.message == expect
end
end
EOS
end
def test_BigMath_log_with_string
assert_raise(ArgumentError) do
BigMath.log("foo", 20)
end
end
def test_BigMath_log_with_nil
assert_raise(ArgumentError) do
BigMath.log(nil, 20)
end
end
def test_BigMath_log_with_non_integer_precision
assert_raise(ArgumentError) do
BigMath.log(1, 0.5)
end
end
def test_BigMath_log_with_nil_precision
assert_raise(ArgumentError) do
BigMath.log(1, nil)
end
end
def test_BigMath_log_with_complex
assert_raise(Math::DomainError) do
BigMath.log(Complex(1, 2), 20)
end
end
def test_BigMath_log_with_zero_arg
assert_raise(Math::DomainError) do
BigMath.log(0, 20)
end
end
def test_BigMath_log_with_negative_arg
assert_raise(Math::DomainError) do
BigMath.log(-1, 20)
end
end
def test_BigMath_log_with_zero_precision
assert_raise(ArgumentError) do
BigMath.log(1, 0)
end
end
def test_BigMath_log_with_negative_precision
assert_raise(ArgumentError) do
BigMath.log(1, -42)
end
end
def test_BigMath_log_with_negative_infinite
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert_raise(Math::DomainError) do
BigMath.log(-BigDecimal::INFINITY, 20)
end
end
end
def test_BigMath_log_with_positive_infinite
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert(BigMath.log(BigDecimal::INFINITY, 20) > 0)
assert_positive_infinite(BigMath.log(BigDecimal::INFINITY, 20))
end
end
def test_BigMath_log_with_nan
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_nan(BigMath.log(BigDecimal::NAN, 20))
end
end
def test_BigMath_log_with_float_nan
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_nan(BigMath.log(Float::NAN, 20))
end
end
def test_BigMath_log_with_1
assert_in_delta(0.0, BigMath.log(1, 20))
assert_in_delta(0.0, BigMath.log(1.0, 20))
assert_in_delta(0.0, BigMath.log(BigDecimal(1), 20))
end
def test_BigMath_log_with_exp_1
assert_in_delta(1.0, BigMath.log(BigMath.E(10), 10))
end
def test_BigMath_log_with_2
assert_in_delta(Math.log(2), BigMath.log(2, 20))
assert_in_delta(Math.log(2), BigMath.log(2.0, 20))
assert_in_delta(Math.log(2), BigMath.log(BigDecimal(2), 20))
end
def test_BigMath_log_with_square_of_E
assert_in_delta(2, BigMath.log(BigMath.E(20)**2, 20))
end
def test_BigMath_log_with_high_precision_case
e = BigDecimal('2.71828182845904523536028747135266249775724709369996')
e_3 = e.mult(e, 50).mult(e, 50)
log_3 = BigMath.log(e_3, 50)
assert_in_delta(3, log_3, 0.0000000000_0000000000_0000000000_0000000000_0000000001)
end
def test_BigMath_log_with_42
assert_in_delta(Math.log(42), BigMath.log(42, 20))
assert_in_delta(Math.log(42), BigMath.log(42.0, 20))
assert_in_delta(Math.log(42), BigMath.log(BigDecimal(42), 20))
end
def test_BigMath_log_with_101
# this is mainly a performance test (should be very fast, not the 0.3 s)
assert_in_delta(Math.log(101), BigMath.log(101, 20), 1E-15)
end
def test_BigMath_log_with_reciprocal_of_42
assert_in_delta(Math.log(1e-42), BigMath.log(1e-42, 20))
assert_in_delta(Math.log(1e-42), BigMath.log(BigDecimal("1e-42"), 20))
end
def test_BigMath_log_under_gc_stress
assert_in_out_err(%w[-rbigdecimal --disable-gems], <<-EOS, [], [])
expect = ":too_long_to_embed_as_string can't be coerced into BigDecimal"
10.times do
begin
BigMath.log(:too_long_to_embed_as_string, 6)
rescue => e
raise unless e.is_a?(ArgumentError)
raise "'\#{expect}' is expected, but '\#{e.message}'" unless e.message == expect
end
end
EOS
end
def test_clone
assert_warning(/^$/) do
x = BigDecimal(0)
assert_same(x, x.clone)
end
end
def test_dup
assert_warning(/^$/) do
[1, -1, 2**100, -2**100].each do |i|
x = BigDecimal(i)
assert_same(x, x.dup)
end
end
end
def test_dup_subclass
assert_warning(/BigDecimal\.new is deprecated/) do
c = Class.new(BigDecimal)
x = c.new(1)
y = x.dup
assert_same(x, y)
assert_equal(1, y)
assert_kind_of(c, y)
end
end
def test_to_d
bug6093 = '[ruby-core:42969]'
code = "exit(BigDecimal('10.0') == 10.0.to_d)"
assert_ruby_status(%w[-rbigdecimal -rbigdecimal/util -rmathn -], code, bug6093)
end if RUBY_VERSION < '2.5' # mathn was removed from Ruby 2.5
def test_bug6406
assert_in_out_err(%w[-rbigdecimal --disable-gems], <<-EOS, [], [])
Thread.current.keys.to_s
EOS
end
def assert_no_memory_leak(code, *rest, **opt)
code = "8.times {20_000.times {begin #{code}; rescue NoMemoryError; end}; GC.start}"
super(["-rbigdecimal"],
"b = BigDecimal('10'); b.nil?; " \
"GC.add_stress_to_class(BigDecimal); "\
"#{code}", code, *rest, rss: true, limit: 1.1, **opt)
end
if EnvUtil.gc_stress_to_class?
def test_no_memory_leak_allocate
assert_no_memory_leak("BigDecimal.allocate")
end
def test_no_memory_leak_initialize
assert_no_memory_leak("BigDecimal()")
end
def test_no_memory_leak_global_new
assert_no_memory_leak("BigDecimal('10')")
assert_no_memory_leak("BigDecimal(b)")
end
def test_no_memory_leak_create
assert_no_memory_leak("b + 10")
end
end
end
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