1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
# frozen_string_literal: false
require_relative "testbase"
require 'bigdecimal/util'
class TestBigDecimalUtil < Test::Unit::TestCase
def test_BigDecimal_to_d
x = BigDecimal(1)
assert_same(x, x.to_d)
end
def test_Integer_to_d
assert_equal(BigDecimal(1), 1.to_d)
assert_equal(BigDecimal(2<<100), (2<<100).to_d)
end
def test_Float_to_d_without_precision
delta = 1.0/10**(Float::DIG)
assert_in_delta(BigDecimal(0.5, Float::DIG), 0.5.to_d, delta)
assert_in_delta(BigDecimal(355.0/113.0, Float::DIG), (355.0/113.0).to_d, delta)
assert_equal(9.05.to_d.to_s('F'), "9.05")
bug9214 = '[ruby-core:58858]'
assert_equal((-0.0).to_d.sign, -1, bug9214)
end
def test_Float_to_d_with_precision
digits = 5
delta = 1.0/10**(digits)
assert_in_delta(BigDecimal(0.5, 5), 0.5.to_d(digits), delta)
assert_in_delta(BigDecimal(355.0/113.0, 5), (355.0/113.0).to_d(digits), delta)
bug9214 = '[ruby-core:58858]'
assert_equal((-0.0).to_d(digits).sign, -1, bug9214)
end
def test_Rational_to_d
digits = 100
delta = 1.0/10**(digits)
assert_in_delta(BigDecimal(1.quo(2), digits), 1.quo(2).to_d(digits), delta)
assert_in_delta(BigDecimal(355.quo(113), digits), 355.quo(113).to_d(digits), delta)
end
def test_Rational_to_d_with_zero_precision
assert_raise(ArgumentError) { 355.quo(113).to_d(0) }
end
def test_Rational_to_d_with_negative_precision
assert_raise(ArgumentError) { 355.quo(113).to_d(-42) }
end
def test_String_to_d
assert_equal("2.5".to_d, BigDecimal.new('2.5'))
end
def test_invalid_String_to_d
assert_equal("invalid".to_d, BigDecimal.new('0.0'))
end
end
|
