rails--rails/activesupport/test/number_helper_test.rb

require 'abstract_unit'
require 'active_support/number_helper'
require 'active_support/core_ext/string/output_safety'

module ActiveSupport
  module NumberHelper
    class NumberHelperTest < ActiveSupport::TestCase

      class TestClassWithInstanceNumberHelpers
        include ActiveSupport::NumberHelper
      end

      class TestClassWithClassNumberHelpers
        extend ActiveSupport::NumberHelper
      end

      def setup
        @instance_with_helpers = TestClassWithInstanceNumberHelpers.new
      end

      def kilobytes(number)
        number * 1024
      end

      def megabytes(number)
        kilobytes(number) * 1024
      end

      def gigabytes(number)
        megabytes(number) * 1024
      end

      def terabytes(number)
        gigabytes(number) * 1024
      end

      def test_number_to_phone
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal("555-1234", number_helper.number_to_phone(5551234))
          assert_equal("800-555-1212", number_helper.number_to_phone(8005551212))
          assert_equal("(800) 555-1212", number_helper.number_to_phone(8005551212, {:area_code => true}))
          assert_equal("", number_helper.number_to_phone("", {:area_code => true}))
          assert_equal("800 555 1212", number_helper.number_to_phone(8005551212, {:delimiter => " "}))
          assert_equal("(800) 555-1212 x 123", number_helper.number_to_phone(8005551212, {:area_code => true, :extension => 123}))
          assert_equal("800-555-1212", number_helper.number_to_phone(8005551212, :extension => "  "))
          assert_equal("555.1212", number_helper.number_to_phone(5551212, :delimiter => '.'))
          assert_equal("800-555-1212", number_helper.number_to_phone("8005551212"))
          assert_equal("+1-800-555-1212", number_helper.number_to_phone(8005551212, :country_code => 1))
          assert_equal("+18005551212", number_helper.number_to_phone(8005551212, :country_code => 1, :delimiter => ''))
          assert_equal("22-555-1212", number_helper.number_to_phone(225551212))
          assert_equal("+45-22-555-1212", number_helper.number_to_phone(225551212, :country_code => 45))
        end
      end

      def test_number_to_currency
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal("$1,234,567,890.50", number_helper.number_to_currency(1234567890.50))
          assert_equal("$1,234,567,890.51", number_helper.number_to_currency(1234567890.506))
          assert_equal("-$1,234,567,890.50", number_helper.number_to_currency(-1234567890.50))
          assert_equal("-$ 1,234,567,890.50", number_helper.number_to_currency(-1234567890.50, {:format => "%u %n"}))
          assert_equal("($1,234,567,890.50)", number_helper.number_to_currency(-1234567890.50, {:negative_format => "(%u%n)"}))
          assert_equal("$1,234,567,892", number_helper.number_to_currency(1234567891.50, {:precision => 0}))
          assert_equal("$1,234,567,890.5", number_helper.number_to_currency(1234567890.50, {:precision => 1}))
          assert_equal("&pound;1234567890,50", number_helper.number_to_currency(1234567890.50, {:unit => "&pound;", :separator => ",", :delimiter => ""}))
          assert_equal("$1,234,567,890.50", number_helper.number_to_currency("1234567890.50"))
          assert_equal("1,234,567,890.50 K&#269;", number_helper.number_to_currency("1234567890.50", {:unit => "K&#269;", :format => "%n %u"}))
          assert_equal("1,234,567,890.50 - K&#269;", number_helper.number_to_currency("-1234567890.50", {:unit => "K&#269;", :format => "%n %u", :negative_format => "%n - %u"}))
          assert_equal("0.00", number_helper.number_to_currency(+0.0, {:unit => "", :negative_format => "(%n)"}))
          assert_equal("(0.00)", number_helper.number_to_currency(-0.0, {:unit => "", :negative_format => "(%n)"}))
        end
      end

      def test_number_to_percentage
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal("100.000%", number_helper.number_to_percentage(100))
          assert_equal("100%", number_helper.number_to_percentage(100, {:precision => 0}))
          assert_equal("302.06%", number_helper.number_to_percentage(302.0574, {:precision => 2}))
          assert_equal("100.000%", number_helper.number_to_percentage("100"))
          assert_equal("1000.000%", number_helper.number_to_percentage("1000"))
          assert_equal("123.4%", number_helper.number_to_percentage(123.400, :precision => 3, :strip_insignificant_zeros => true))
          assert_equal("1.000,000%", number_helper.number_to_percentage(1000, :delimiter => '.', :separator => ','))
          assert_equal("1000.000  %", number_helper.number_to_percentage(1000, :format => "%n  %"))
          assert_equal("98a%", number_helper.number_to_percentage("98a"))
          assert_equal("NaN%", number_helper.number_to_percentage(Float::NAN))
          assert_equal("Inf%", number_helper.number_to_percentage(Float::INFINITY))
          assert_equal("NaN%", number_helper.number_to_percentage(Float::NAN, precision: 0))
          assert_equal("Inf%", number_helper.number_to_percentage(Float::INFINITY, precision: 0))
          assert_equal("NaN%", number_helper.number_to_percentage(Float::NAN, precision: 1))
          assert_equal("Inf%", number_helper.number_to_percentage(Float::INFINITY, precision: 1))
          assert_equal("1000%", number_helper.number_to_percentage(1000, precision: nil))
          assert_equal("1000%", number_helper.number_to_percentage(1000, precision: nil))
          assert_equal("1000.1%", number_helper.number_to_percentage(1000.1, precision: nil))
          assert_equal("-0.13 %", number_helper.number_to_percentage("-0.13", precision: nil, format: "%n %"))
        end
      end

      def test_to_delimited
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal("12,345,678", number_helper.number_to_delimited(12345678))
          assert_equal("0", number_helper.number_to_delimited(0))
          assert_equal("123", number_helper.number_to_delimited(123))
          assert_equal("123,456", number_helper.number_to_delimited(123456))
          assert_equal("123,456.78", number_helper.number_to_delimited(123456.78))
          assert_equal("123,456.789", number_helper.number_to_delimited(123456.789))
          assert_equal("123,456.78901", number_helper.number_to_delimited(123456.78901))
          assert_equal("123,456,789.78901", number_helper.number_to_delimited(123456789.78901))
          assert_equal("0.78901", number_helper.number_to_delimited(0.78901))
          assert_equal("123,456.78", number_helper.number_to_delimited("123456.78"))
          assert_equal("1,23,456.78", number_helper.number_to_delimited("123456.78", delimiter_pattern: /(\d+?)(?=(\d\d)+(\d)(?!\d))/))
          assert_equal("123,456.78", number_helper.number_to_delimited("123456.78".html_safe))
        end
      end

      def test_to_delimited_with_options_hash
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal '12 345 678', number_helper.number_to_delimited(12345678, :delimiter => ' ')
          assert_equal '12,345,678-05', number_helper.number_to_delimited(12345678.05, :separator => '-')
          assert_equal '12.345.678,05', number_helper.number_to_delimited(12345678.05, :separator => ',', :delimiter => '.')
        end
      end

      def test_to_rounded
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal("-111.235", number_helper.number_to_rounded(-111.2346))
          assert_equal("111.235", number_helper.number_to_rounded(111.2346))
          assert_equal("31.83", number_helper.number_to_rounded(31.825, :precision => 2))
          assert_equal("111.23", number_helper.number_to_rounded(111.2346, :precision => 2))
          assert_equal("111.00", number_helper.number_to_rounded(111, :precision => 2))
          assert_equal("111.235", number_helper.number_to_rounded("111.2346"))
          assert_equal("31.83", number_helper.number_to_rounded("31.825", :precision => 2))
          assert_equal("3268", number_helper.number_to_rounded((32.6751 * 100.00), :precision => 0))
          assert_equal("112", number_helper.number_to_rounded(111.50, :precision => 0))
          assert_equal("1234567892", number_helper.number_to_rounded(1234567891.50, :precision => 0))
          assert_equal("0", number_helper.number_to_rounded(0, :precision => 0))
          assert_equal("0.00100", number_helper.number_to_rounded(0.001, :precision => 5))
          assert_equal("0.001", number_helper.number_to_rounded(0.00111, :precision => 3))
          assert_equal("10.00", number_helper.number_to_rounded(9.995, :precision => 2))
          assert_equal("11.00", number_helper.number_to_rounded(10.995, :precision => 2))
          assert_equal("0.00", number_helper.number_to_rounded(-0.001, :precision => 2))

          assert_equal("111.23460000000000000000", number_helper.number_to_rounded(111.2346, :precision => 20))
          assert_equal("111.23460000000000000000", number_helper.number_to_rounded(Rational(1112346, 10000), :precision => 20))
          assert_equal("111.23460000000000000000", number_helper.number_to_rounded('111.2346', :precision => 20))
          assert_equal("111.23460000000000000000", number_helper.number_to_rounded(BigDecimal(111.2346, Float::DIG), :precision => 20))
          assert_equal("111.2346" + "0"*96, number_helper.number_to_rounded('111.2346', :precision => 100))
          assert_equal("111.2346", number_helper.number_to_rounded(Rational(1112346, 10000), :precision => 4))
          assert_equal('0.00', number_helper.number_to_rounded(Rational(0, 1), :precision => 2))
        end
      end

      def test_to_rounded_with_custom_delimiter_and_separator
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal '31,83',       number_helper.number_to_rounded(31.825, :precision => 2, :separator => ',')
          assert_equal '1.231,83',    number_helper.number_to_rounded(1231.825, :precision => 2, :separator => ',', :delimiter => '.')
        end
      end

      def test_to_rounded_with_significant_digits
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal "124000", number_helper.number_to_rounded(123987, :precision => 3, :significant => true)
          assert_equal "120000000", number_helper.number_to_rounded(123987876, :precision => 2, :significant => true )
          assert_equal "40000", number_helper.number_to_rounded("43523", :precision => 1, :significant => true )
          assert_equal "9775", number_helper.number_to_rounded(9775, :precision => 4, :significant => true )
          assert_equal "5.4", number_helper.number_to_rounded(5.3923, :precision => 2, :significant => true )
          assert_equal "5", number_helper.number_to_rounded(5.3923, :precision => 1, :significant => true )
          assert_equal "1", number_helper.number_to_rounded(1.232, :precision => 1, :significant => true )
          assert_equal "7", number_helper.number_to_rounded(7, :precision => 1, :significant => true )
          assert_equal "1", number_helper.number_to_rounded(1, :precision => 1, :significant => true )
          assert_equal "53", number_helper.number_to_rounded(52.7923, :precision => 2, :significant => true )
          assert_equal "9775.00", number_helper.number_to_rounded(9775, :precision => 6, :significant => true )
          assert_equal "5.392900", number_helper.number_to_rounded(5.3929, :precision => 7, :significant => true )
          assert_equal "0.0", number_helper.number_to_rounded(0, :precision => 2, :significant => true )
          assert_equal "0", number_helper.number_to_rounded(0, :precision => 1, :significant => true )
          assert_equal "0.0001", number_helper.number_to_rounded(0.0001, :precision => 1, :significant => true )
          assert_equal "0.000100", number_helper.number_to_rounded(0.0001, :precision => 3, :significant => true )
          assert_equal "0.0001", number_helper.number_to_rounded(0.0001111, :precision => 1, :significant => true )
          assert_equal "10.0", number_helper.number_to_rounded(9.995, :precision => 3, :significant => true)
          assert_equal "9.99", number_helper.number_to_rounded(9.994, :precision => 3, :significant => true)
          assert_equal "11.0", number_helper.number_to_rounded(10.995, :precision => 3, :significant => true)

          assert_equal "9775.0000000000000000", number_helper.number_to_rounded(9775, :precision => 20, :significant => true )
          assert_equal "9775.0000000000000000", number_helper.number_to_rounded(9775.0, :precision => 20, :significant => true )
          assert_equal "9775.0000000000000000", number_helper.number_to_rounded(Rational(9775, 1), :precision => 20, :significant => true )
          assert_equal "97.750000000000000000", number_helper.number_to_rounded(Rational(9775, 100), :precision => 20, :significant => true )
          assert_equal "9775.0000000000000000", number_helper.number_to_rounded(BigDecimal(9775), :precision => 20, :significant => true )
          assert_equal "9775.0000000000000000", number_helper.number_to_rounded("9775", :precision => 20, :significant => true )
          assert_equal "9775." + "0"*96, number_helper.number_to_rounded("9775", :precision => 100, :significant => true )
          assert_equal("97.7", number_helper.number_to_rounded(Rational(9772, 100), :precision => 3, :significant => true))
        end
      end

      def test_to_rounded_with_strip_insignificant_zeros
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal "9775.43", number_helper.number_to_rounded(9775.43, :precision => 4, :strip_insignificant_zeros => true )
          assert_equal "9775.2", number_helper.number_to_rounded(9775.2, :precision => 6, :significant => true, :strip_insignificant_zeros => true )
          assert_equal "0", number_helper.number_to_rounded(0, :precision => 6, :significant => true, :strip_insignificant_zeros => true )
        end
      end

      def test_to_rounded_with_significant_true_and_zero_precision
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          # Zero precision with significant is a mistake (would always return zero),
          # so we treat it as if significant was false (increases backwards compatibility for number_to_human_size)
          assert_equal "124", number_helper.number_to_rounded(123.987, :precision => 0, :significant => true)
          assert_equal "12", number_helper.number_to_rounded(12, :precision => 0, :significant => true )
          assert_equal "12", number_helper.number_to_rounded("12.3", :precision => 0, :significant => true )
        end
      end

      def test_number_number_to_human_size
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal '0 Bytes',   number_helper.number_to_human_size(0)
          assert_equal '1 Byte',    number_helper.number_to_human_size(1)
          assert_equal '3 Bytes',   number_helper.number_to_human_size(3.14159265)
          assert_equal '123 Bytes', number_helper.number_to_human_size(123.0)
          assert_equal '123 Bytes', number_helper.number_to_human_size(123)
          assert_equal '1.21 KB',    number_helper.number_to_human_size(1234)
          assert_equal '12.1 KB',   number_helper.number_to_human_size(12345)
          assert_equal '1.18 MB',    number_helper.number_to_human_size(1234567)
          assert_equal '1.15 GB',    number_helper.number_to_human_size(1234567890)
          assert_equal '1.12 TB',    number_helper.number_to_human_size(1234567890123)
          assert_equal '1030 TB',   number_helper.number_to_human_size(terabytes(1026))
          assert_equal '444 KB',    number_helper.number_to_human_size(kilobytes(444))
          assert_equal '1020 MB',   number_helper.number_to_human_size(megabytes(1023))
          assert_equal '3 TB',      number_helper.number_to_human_size(terabytes(3))
          assert_equal '1.2 MB',   number_helper.number_to_human_size(1234567, :precision => 2)
          assert_equal '3 Bytes',   number_helper.number_to_human_size(3.14159265, :precision => 4)
          assert_equal '123 Bytes', number_helper.number_to_human_size('123')
          assert_equal '1 KB',   number_helper.number_to_human_size(kilobytes(1.0123), :precision => 2)
          assert_equal '1.01 KB',   number_helper.number_to_human_size(kilobytes(1.0100), :precision => 4)
          assert_equal '10 KB',   number_helper.number_to_human_size(kilobytes(10.000), :precision => 4)
          assert_equal '1 Byte',   number_helper.number_to_human_size(1.1)
          assert_equal '10 Bytes', number_helper.number_to_human_size(10)
        end
      end

      def test_number_to_human_size_with_si_prefix
        assert_deprecated do
          [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
            assert_equal '3 Bytes',    number_helper.number_to_human_size(3.14159265, :prefix => :si)
            assert_equal '123 Bytes',  number_helper.number_to_human_size(123.0, :prefix => :si)
            assert_equal '123 Bytes',  number_helper.number_to_human_size(123, :prefix => :si)
            assert_equal '1.23 KB',    number_helper.number_to_human_size(1234, :prefix => :si)
            assert_equal '12.3 KB',    number_helper.number_to_human_size(12345, :prefix => :si)
            assert_equal '1.23 MB',    number_helper.number_to_human_size(1234567, :prefix => :si)
            assert_equal '1.23 GB',    number_helper.number_to_human_size(1234567890, :prefix => :si)
            assert_equal '1.23 TB',    number_helper.number_to_human_size(1234567890123, :prefix => :si)
          end
        end
      end

      def test_number_to_human_size_with_options_hash
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal '1.2 MB',   number_helper.number_to_human_size(1234567, :precision => 2)
          assert_equal '3 Bytes',   number_helper.number_to_human_size(3.14159265, :precision => 4)
          assert_equal '1 KB',   number_helper.number_to_human_size(kilobytes(1.0123), :precision => 2)
          assert_equal '1.01 KB',   number_helper.number_to_human_size(kilobytes(1.0100), :precision => 4)
          assert_equal '10 KB',     number_helper.number_to_human_size(kilobytes(10.000), :precision => 4)
          assert_equal '1 TB', number_helper.number_to_human_size(1234567890123, :precision => 1)
          assert_equal '500 MB', number_helper.number_to_human_size(524288000, :precision=>3)
          assert_equal '10 MB', number_helper.number_to_human_size(9961472, :precision=>0)
          assert_equal '40 KB', number_helper.number_to_human_size(41010, :precision => 1)
          assert_equal '40 KB', number_helper.number_to_human_size(41100, :precision => 2)
          assert_equal '1.0 KB',   number_helper.number_to_human_size(kilobytes(1.0123), :precision => 2, :strip_insignificant_zeros => false)
          assert_equal '1.012 KB',   number_helper.number_to_human_size(kilobytes(1.0123), :precision => 3, :significant => false)
          assert_equal '1 KB',   number_helper.number_to_human_size(kilobytes(1.0123), :precision => 0, :significant => true) #ignores significant it precision is 0
        end
      end

      def test_number_to_human_size_with_custom_delimiter_and_separator
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal '1,01 KB',     number_helper.number_to_human_size(kilobytes(1.0123), :precision => 3, :separator => ',')
          assert_equal '1,01 KB',     number_helper.number_to_human_size(kilobytes(1.0100), :precision => 4, :separator => ',')
          assert_equal '1.000,1 TB',  number_helper.number_to_human_size(terabytes(1000.1), :precision => 5, :delimiter => '.', :separator => ',')
        end
      end

      def test_number_to_human
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal '-123', number_helper.number_to_human(-123)
          assert_equal '-0.5', number_helper.number_to_human(-0.5)
          assert_equal '0',   number_helper.number_to_human(0)
          assert_equal '0.5', number_helper.number_to_human(0.5)
          assert_equal '123', number_helper.number_to_human(123)
          assert_equal '1.23 Thousand', number_helper.number_to_human(1234)
          assert_equal '12.3 Thousand', number_helper.number_to_human(12345)
          assert_equal '1.23 Million', number_helper.number_to_human(1234567)
          assert_equal '1.23 Billion', number_helper.number_to_human(1234567890)
          assert_equal '1.23 Trillion', number_helper.number_to_human(1234567890123)
          assert_equal '1.23 Quadrillion', number_helper.number_to_human(1234567890123456)
          assert_equal '1230 Quadrillion', number_helper.number_to_human(1234567890123456789)
          assert_equal '490 Thousand', number_helper.number_to_human(489939, :precision => 2)
          assert_equal '489.9 Thousand', number_helper.number_to_human(489939, :precision => 4)
          assert_equal '489 Thousand', number_helper.number_to_human(489000, :precision => 4)
          assert_equal '489.0 Thousand', number_helper.number_to_human(489000, :precision => 4, :strip_insignificant_zeros => false)
          assert_equal '1.2346 Million', number_helper.number_to_human(1234567, :precision => 4, :significant => false)
          assert_equal '1,2 Million', number_helper.number_to_human(1234567, :precision => 1, :significant => false, :separator => ',')
          assert_equal '1 Million', number_helper.number_to_human(1234567, :precision => 0, :significant => true, :separator => ',') #significant forced to false
          assert_equal '1 Million', number_helper.number_to_human(999999)
          assert_equal '1 Billion', number_helper.number_to_human(999999999)
        end
      end

      def test_number_to_human_with_custom_units
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          #Only integers
          volume = {:unit => "ml", :thousand => "lt", :million => "m3"}
          assert_equal '123 lt', number_helper.number_to_human(123456, :units => volume)
          assert_equal '12 ml', number_helper.number_to_human(12, :units => volume)
          assert_equal '1.23 m3', number_helper.number_to_human(1234567, :units => volume)

          #Including fractionals
          distance = {:mili => "mm", :centi => "cm", :deci => "dm", :unit => "m", :ten => "dam", :hundred => "hm", :thousand => "km"}
          assert_equal '1.23 mm', number_helper.number_to_human(0.00123, :units => distance)
          assert_equal '1.23 cm', number_helper.number_to_human(0.0123, :units => distance)
          assert_equal '1.23 dm', number_helper.number_to_human(0.123, :units => distance)
          assert_equal '1.23 m', number_helper.number_to_human(1.23, :units => distance)
          assert_equal '1.23 dam', number_helper.number_to_human(12.3, :units => distance)
          assert_equal '1.23 hm', number_helper.number_to_human(123, :units => distance)
          assert_equal '1.23 km', number_helper.number_to_human(1230, :units => distance)
          assert_equal '1.23 km', number_helper.number_to_human(1230, :units => distance)
          assert_equal '1.23 km', number_helper.number_to_human(1230, :units => distance)
          assert_equal '12.3 km', number_helper.number_to_human(12300, :units => distance)

          #The quantifiers don't need to be a continuous sequence
          gangster = {:hundred => "hundred bucks", :million => "thousand quids"}
          assert_equal '1 hundred bucks', number_helper.number_to_human(100, :units => gangster)
          assert_equal '25 hundred bucks', number_helper.number_to_human(2500, :units => gangster)
          assert_equal '25 thousand quids', number_helper.number_to_human(25000000, :units => gangster)
          assert_equal '12300 thousand quids', number_helper.number_to_human(12345000000, :units => gangster)

          #Spaces are stripped from the resulting string
          assert_equal '4', number_helper.number_to_human(4, :units => {:unit => "", :ten => 'tens '})
          assert_equal '4.5  tens', number_helper.number_to_human(45, :units => {:unit => "", :ten => ' tens   '})
        end
      end

      def test_number_to_human_with_custom_units_that_are_missing_the_needed_key
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal '123', number_helper.number_to_human(123, units: { thousand: 'k'})
          assert_equal '123', number_helper.number_to_human(123, units: {})
        end
      end

      def test_number_to_human_with_custom_format
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal '123 times Thousand', number_helper.number_to_human(123456, :format => "%n times %u")
          volume = {:unit => "ml", :thousand => "lt", :million => "m3"}
          assert_equal '123.lt', number_helper.number_to_human(123456, :units => volume, :format => "%n.%u")
        end
      end

      def test_number_helpers_should_return_nil_when_given_nil
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_nil number_helper.number_to_phone(nil)
          assert_nil number_helper.number_to_currency(nil)
          assert_nil number_helper.number_to_percentage(nil)
          assert_nil number_helper.number_to_delimited(nil)
          assert_nil number_helper.number_to_rounded(nil)
          assert_nil number_helper.number_to_human_size(nil)
          assert_nil number_helper.number_to_human(nil)
        end
      end

      def test_number_helpers_do_not_mutate_options_hash
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          options = { 'raise' => true }

          number_helper.number_to_phone(1, options)
          assert_equal({ 'raise' => true }, options)

          number_helper.number_to_currency(1, options)
          assert_equal({ 'raise' => true }, options)

          number_helper.number_to_percentage(1, options)
          assert_equal({ 'raise' => true }, options)

          number_helper.number_to_delimited(1, options)
          assert_equal({ 'raise' => true }, options)

          number_helper.number_to_rounded(1, options)
          assert_equal({ 'raise' => true }, options)

          number_helper.number_to_human_size(1, options)
          assert_equal({ 'raise' => true }, options)

          number_helper.number_to_human(1, options)
          assert_equal({ 'raise' => true }, options)
        end
      end

      def test_number_helpers_should_return_non_numeric_param_unchanged
        [@instance_with_helpers, TestClassWithClassNumberHelpers, ActiveSupport::NumberHelper].each do |number_helper|
          assert_equal("+1-x x 123", number_helper.number_to_phone("x", :country_code => 1, :extension => 123))
          assert_equal("x", number_helper.number_to_phone("x"))
          assert_equal("$x.", number_helper.number_to_currency("x."))
          assert_equal("$x", number_helper.number_to_currency("x"))
          assert_equal("x%", number_helper.number_to_percentage("x"))
          assert_equal("x", number_helper.number_to_delimited("x"))
          assert_equal("x.", number_helper.number_to_rounded("x."))
          assert_equal("x", number_helper.number_to_rounded("x"))
          assert_equal "x", number_helper.number_to_human_size('x')
          assert_equal "x", number_helper.number_to_human('x')
        end
      end

    end
  end
end