spec/ruby/library/random/formatter/alphanumeric_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
52
53
54
55
56

require_relative '../../../spec_helper'

require 'random/formatter'

describe "Random::Formatter#alphanumeric" do
  before :each do
    @object = Object.new
    @object.extend(Random::Formatter)
    @object.define_singleton_method(:bytes) do |n|
      "\x00".b * n
    end
  end

  it "generates a random alphanumeric string" do
    @object.alphanumeric.should =~ /\A[A-Za-z0-9]+\z/
  end

  it "has a default size of 16 characters" do
    @object.alphanumeric.size.should == 16
  end

  it "accepts a 'size' argument" do
    @object.alphanumeric(10).size.should == 10
  end

  it "uses the default size if 'nil' is given as size argument" do
    @object.alphanumeric(nil).size.should == 16
  end

  it "raises an ArgumentError if the size is not numeric" do
    -> {
      @object.alphanumeric("10")
    }.should raise_error(ArgumentError)
  end

  it "does not coerce the size argument with #to_int" do
    size = mock("size")
    size.should_not_receive(:to_int)
    -> {
      @object.alphanumeric(size)
    }.should raise_error(ArgumentError)
  end

  ruby_version_is "3.3" do
    it "accepts a 'chars' argument with the output alphabet" do
      @object.alphanumeric(chars: ['a', 'b']).should =~ /\A[ab]+\z/
    end

    it "converts the elements of chars using #to_s" do
      to_s = mock("to_s")
      to_s.should_receive(:to_s).and_return("[mock to_s]")
      # Using 1 value in chars results in an infinite loop
      @object.alphanumeric(1, chars: [to_s, to_s]).should == "[mock to_s]"
    end
  end
end