File: truncate.rb

package info (click to toggle)
ruby3.1 3.1.2-7%2Bdeb12u1
  • links: PTS, VCS
  • area: main
  • in suites:
  • size: 132,892 kB
  • sloc: ruby: 1,154,753; ansic: 736,782; yacc: 46,445; pascal: 10,401; sh: 3,931; cpp: 1,158; python: 838; makefile: 787; asm: 462; javascript: 382; lisp: 97; sed: 94; perl: 62; awk: 36; xml: 4
file content (45 lines) | stat: -rw-r--r-- 1,299 bytes parent folder | download | duplicates (3)
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
require_relative '../../spec_helper'

describe :rational_truncate, shared: true do
  before do
    @rational = Rational(2200, 7)
  end

  describe "with no arguments (precision = 0)" do
    it "returns an integer" do
      @rational.truncate.should be_kind_of(Integer)
    end

    it "returns the truncated value toward 0" do
      @rational.truncate.should == 314
      Rational(1, 2).truncate.should == 0
      Rational(-1, 2).truncate.should == 0
    end
  end

  describe "with a precision < 0" do
    it "returns an integer" do
      @rational.truncate(-2).should be_kind_of(Integer)
      @rational.truncate(-1).should be_kind_of(Integer)
    end

    it "moves the truncation point n decimal places left" do
      @rational.truncate(-3).should == 0
      @rational.truncate(-2).should == 300
      @rational.truncate(-1).should == 310
    end
  end

  describe "with a precision > 0" do
    it "returns a Rational" do
      @rational.truncate(1).should be_kind_of(Rational)
      @rational.truncate(2).should be_kind_of(Rational)
    end

    it "moves the truncation point n decimal places right" do
      @rational.truncate(1).should == Rational(1571, 5)
      @rational.truncate(2).should == Rational(7857, 25)
      @rational.truncate(3).should == Rational(62857, 200)
    end
  end
end