spec/ruby/library/bigdecimal/frac_spec.rb


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

require_relative '../../spec_helper'

ruby_version_is ""..."3.4" do
  require 'bigdecimal'

  describe "BigDecimal#frac" do
    before :each do
      @zero = BigDecimal("0")
      @mixed = BigDecimal("1.23456789")
      @pos_int = BigDecimal("2E5555")
      @neg_int = BigDecimal("-2E5555")
      @pos_frac = BigDecimal("2E-9999")
      @neg_frac = BigDecimal("-2E-9999")

      @infinity = BigDecimal("Infinity")
      @infinity_neg = BigDecimal("-Infinity")
      @nan = BigDecimal("NaN")
      @zero_pos = BigDecimal("+0")
      @zero_neg = BigDecimal("-0")
    end

    it "returns a BigDecimal" do
      @pos_int.frac.kind_of?(BigDecimal).should == true
      @neg_int.frac.kind_of?(BigDecimal).should == true
      @pos_frac.kind_of?(BigDecimal).should == true
      @neg_frac.kind_of?(BigDecimal).should == true
    end

    it "returns the fractional part of the absolute value" do
      @mixed.frac.should == BigDecimal("0.23456789")
      @pos_frac.frac.should == @pos_frac
      @neg_frac.frac.should == @neg_frac
    end

    it "returns 0 if the value is 0" do
      @zero.frac.should == @zero
    end

    it "returns 0 if the value is an integer" do
      @pos_int.frac.should == @zero
      @neg_int.frac.should == @zero
    end

    it "correctly handles special values" do
      @infinity.frac.should == @infinity
      @infinity_neg.frac.should == @infinity_neg
      @nan.frac.should.nan?
    end

  end
end