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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
require_relative '../../spec_helper'
require 'bigdecimal'
describe "BigDecimal#>" do
before :each do
@zero = BigDecimal("0")
@zero_pos = BigDecimal("+0")
@zero_neg = BigDecimal("-0")
@mixed = BigDecimal("1.23456789")
@pos_int = BigDecimal("2E5555")
@neg_int = BigDecimal("-2E5555")
@pos_frac = BigDecimal("2E-9999")
@neg_frac = BigDecimal("-2E-9999")
@int_mock = mock('123')
class << @int_mock
def coerce(other)
return [other, BigDecimal('123')]
end
def >(other)
BigDecimal('123') > other
end
end
@values = [@mixed, @pos_int, @neg_int, @pos_frac, @neg_frac,
-2**32, -2**31, -2**30, -2**16, -2**8, -100, -10, -1,
@zero , 1, 2, 10, 10.5, 2**8, 2**16, 2**32, @int_mock, @zero_pos, @zero_neg]
@infinity = BigDecimal("Infinity")
@infinity_neg = BigDecimal("-Infinity")
@float_infinity = Float::INFINITY
@float_infinity_neg = -Float::INFINITY
@nan = BigDecimal("NaN")
end
it "returns true if a > b" do
one = BigDecimal("1")
two = BigDecimal("2")
frac_1 = BigDecimal("1E-99999")
frac_2 = BigDecimal("0.9E-99999")
(@zero > one).should == false
(two > @zero).should == true
(frac_2 > frac_1).should == false
(@neg_int > @pos_int).should == false
(@pos_int > @neg_int).should == true
(@neg_int > @pos_frac).should == false
(@pos_frac > @neg_int).should == true
(@zero > @zero_pos).should == false
(@zero > @zero_neg).should == false
(@zero_neg > @zero_pos).should == false
(@zero_pos > @zero_neg).should == false
end
it "properly handles infinity values" do
@values.each { |val|
(val > @infinity).should == false
(@infinity > val).should == true
(val > @infinity_neg).should == true
(@infinity_neg > val).should == false
}
(@infinity > @infinity).should == false
(@infinity_neg > @infinity_neg).should == false
(@infinity > @infinity_neg).should == true
(@infinity_neg > @infinity).should == false
end
it "properly handles Float infinity values" do
@values.each { |val|
(val > @float_infinity).should == false
(@float_infinity > val).should == true
(val > @float_infinity_neg).should == true
(@float_infinity_neg > val).should == false
}
end
it "properly handles NaN values" do
@values += [@infinity, @infinity_neg, @nan]
@values.each { |val|
(@nan > val).should == false
(val > @nan).should == false
}
end
it "raises an ArgumentError if the argument can't be coerced into a BigDecimal" do
-> {@zero > nil }.should raise_error(ArgumentError)
-> {@infinity > nil }.should raise_error(ArgumentError)
-> {@infinity_neg > nil }.should raise_error(ArgumentError)
-> {@mixed > nil }.should raise_error(ArgumentError)
-> {@pos_int > nil }.should raise_error(ArgumentError)
-> {@neg_frac > nil }.should raise_error(ArgumentError)
end
end
|
