blob: d1934841c8ded7e1f472f0cd21c8ec537e6bb0ab (
plain)
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
|
require_relative '../../spec_helper'
require 'bigdecimal'
describe "BigDecimal#+" do
before :each do
@one = BigDecimal("1")
@zero = BigDecimal("0")
@two = BigDecimal("2")
@three = BigDecimal("3")
@ten = BigDecimal("10")
@eleven = BigDecimal("11")
@nan = BigDecimal("NaN")
@infinity = BigDecimal("Infinity")
@infinity_minus = BigDecimal("-Infinity")
@one_minus = BigDecimal("-1")
@frac_1 = BigDecimal("1E-99999")
@frac_2 = BigDecimal("0.9E-99999")
end
it "returns a + b" do
(@two + @one).should == @three
(@one + @two).should == @three
(@one + @one_minus).should == @zero
(@zero + @one).should == @one
(@ten + @one).should == @eleven
(@frac_1 + @frac_2).should == BigDecimal("1.9E-99999")
(@frac_2 + @frac_1).should == BigDecimal("1.9E-99999")
(@frac_1 + @frac_1).should == BigDecimal("2E-99999")
end
it "returns NaN if NaN is involved" do
(@one + @nan).should.nan?
(@nan + @one).should.nan?
end
it "returns Infinity or -Infinity if these are involved" do
(@zero + @infinity).should == @infinity
(@frac_2 + @infinity).should == @infinity
(@two + @infinity_minus).should == @infinity_minus
end
it "returns NaN if Infinity + (- Infinity)" do
(@infinity + @infinity_minus).should.nan?
end
describe "with Object" do
it "tries to coerce the other operand to self" do
object = mock("Object")
object.should_receive(:coerce).with(@one).and_return([@one, BigDecimal("42")])
(@one + object).should == BigDecimal("43")
end
end
end
|
