number_helper_i18n_test.rb

require 'abstract_unit'

class NumberHelperTest < ActionView::TestCase
  tests ActionView::Helpers::NumberHelper

  def setup
    I18n.backend.store_translations 'ts',
      :number => {
        :format => { :precision => 3, :delimiter => ',', :separator => '.', :significant => false, :strip_insignificant_zeros => false },
        :currency => { :format => { :unit => '&$', :format => '%u - %n', :precision => 2 } },
        :human => {
          :format => {
            :precision => 2,
            :significant => true,
            :strip_insignificant_zeros => true
          },
          :storage_units => {
            :format => "%n %u",
            :units => {
              :byte => "b",
              :kb => "k"
            }
          },
          :decimal_units => {
            :format => "%n %u",
            :units => {
              :deci => {:one => "Tenth", :other => "Tenths"},
              :unit =>  "u",
              :ten => {:one => "Ten", :other => "Tens"},
              :thousand => "t",
              :million => "m" ,
              :billion =>"b" ,
              :trillion =>"t" ,
              :quadrillion =>"q"
            }
          }
        },
        :percentage => { :format => {:delimiter => '', :precision => 2, :strip_insignificant_zeros => true} },
        :precision => { :format => {:delimiter => '', :significant => true} }
      },
      :custom_units_for_number_to_human => {:mili => "mm", :centi => "cm", :deci => "dm", :unit => "m", :ten => "dam", :hundred => "hm", :thousand => "km"}
  end

  def test_number_to_currency
    assert_equal("&$ - 10.00", number_to_currency(10, :locale => 'ts'))
  end

  def test_number_to_currency_with_clean_i18n_settings
    clean_i18n do
      assert_equal("$10.00", number_to_currency(10))
    end
  end

  def test_number_with_precision
    #Delimiter was set to ""
    assert_equal("10000", number_with_precision(10000, :locale => 'ts'))

    #Precision inherited and significant was set
    assert_equal("1.00", number_with_precision(1.0, :locale => 'ts'))

  end

  def test_number_with_delimiter
    #Delimiter "," and separator "."
    assert_equal("1,000,000.234", number_with_delimiter(1000000.234, :locale => 'ts'))
  end

  def test_number_to_percentage
    # to see if strip_insignificant_zeros is true
    assert_equal("1%", number_to_percentage(1, :locale => 'ts'))
    # precision is 2, significant should be inherited
    assert_equal("1.24%", number_to_percentage(1.2434, :locale => 'ts'))
    # no delimiter
    assert_equal("12434%", number_to_percentage(12434, :locale => 'ts'))
  end

  def test_number_to_human_size
    #b for bytes and k for kbytes
    assert_equal("2 k", number_to_human_size(2048, :locale => 'ts'))
    assert_equal("42 b", number_to_human_size(42, :locale => 'ts'))
  end

  def test_number_to_human_with_default_translation_scope
    #Using t for thousand
    assert_equal "2 t", number_to_human(2000, :locale => 'ts')
    #Significant was set to true with precision 2, using b for billion
    assert_equal "1.2 b", number_to_human(1234567890, :locale => 'ts')
    #Using pluralization (Ten/Tens and Tenth/Tenths)
    assert_equal "1 Tenth", number_to_human(0.1, :locale => 'ts')
    assert_equal "1.3 Tenth", number_to_human(0.134, :locale => 'ts')
    assert_equal "2 Tenths", number_to_human(0.2, :locale => 'ts')
    assert_equal "1 Ten", number_to_human(10, :locale => 'ts')
    assert_equal "1.2 Ten", number_to_human(12, :locale => 'ts')
    assert_equal "2 Tens", number_to_human(20, :locale => 'ts')
  end

  def test_number_to_human_with_custom_translation_scope
    #Significant was set to true with precision 2, with custom translated units
    assert_equal "4.3 cm", number_to_human(0.0432, :locale => 'ts', :units => :custom_units_for_number_to_human)
  end

  private
    def clean_i18n
      load_path = I18n.load_path.dup
      I18n.load_path.clear
      I18n.reload!
      yield
    ensure
      I18n.load_path = load_path
      I18n.reload!
    end
end