Fix pluralization of uncountables when given a locale

Previously apply_inflections would only use the :en uncountables
rather then the ones for the locale that was passed to pluralize or
singularize.

This changes apply_inflections to take a locale which it will use to
find the uncountables.

activesupport/CHANGELOG.md

@@ -1,3 +1,7 @@
*   Fix Inflector#apply_inflections to use a locale for uncountables

    *Eilis Hamilton*

*   Add support for versioned cache entries. This enables the cache stores to recycle cache keys, greatly saving
    on storage in cases with frequent churn. Works together with the separation of `#cache_key` and `#cache_version`
    in Active Record and its use in Action Pack's fragment caching.

activesupport/lib/active_support/inflector/methods.rb

@@ -28,7 +28,7 @@ module Inflector
    #   pluralize('CamelOctopus')     # => "CamelOctopi"
    #   pluralize('ley', :es)         # => "leyes"
    def pluralize(word, locale = :en)
      apply_inflections(word, inflections(locale).plurals)
      apply_inflections(word, inflections(locale).plurals, locale)
    end

    # The reverse of #pluralize, returns the singular form of a word in a
@@ -45,7 +45,7 @@ def pluralize(word, locale = :en)
    #   singularize('CamelOctopi')      # => "CamelOctopus"
    #   singularize('leyes', :es)       # => "ley"
    def singularize(word, locale = :en)
      apply_inflections(word, inflections(locale).singulars)
      apply_inflections(word, inflections(locale).singulars, locale)
    end

    # Converts strings to UpperCamelCase.
@@ -387,12 +387,15 @@ def const_regexp(camel_cased_word)

      # Applies inflection rules for +singularize+ and +pluralize+.
      #
      #  apply_inflections('post', inflections.plurals)    # => "posts"
      #  apply_inflections('posts', inflections.singulars) # => "post"
      def apply_inflections(word, rules)
      # If passed an optional +locale+ parameter, the uncountables will be
      # found for that locale.
      #
      #  apply_inflections('post', inflections.plurals, :en)    # => "posts"
      #  apply_inflections('posts', inflections.singulars, :en) # => "post"
      def apply_inflections(word, rules, locale = :en)
        result = word.to_s.dup

        if word.empty? || inflections.uncountables.uncountable?(result)
        if word.empty? || inflections(locale).uncountables.uncountable?(result)
          result
        else
          rules.each { |(rule, replacement)| break if result.sub!(rule, replacement) }

activesupport/test/inflector_test.rb

@@ -420,6 +420,8 @@ def test_inflector_locality
      inflect.singular(/es$/, "")

      inflect.irregular("el", "los")

      inflect.uncountable("agua")
    end

    assert_equal("hijos", "hijo".pluralize(:es))
@@ -432,12 +434,17 @@ def test_inflector_locality
    assert_equal("los", "el".pluralize(:es))
    assert_equal("els", "el".pluralize)

    assert_equal("agua", "agua".pluralize(:es))
    assert_equal("aguas", "agua".pluralize)

    ActiveSupport::Inflector.inflections(:es) { |inflect| inflect.clear }

    assert ActiveSupport::Inflector.inflections(:es).plurals.empty?
    assert ActiveSupport::Inflector.inflections(:es).singulars.empty?
    assert ActiveSupport::Inflector.inflections(:es).uncountables.empty?
    assert !ActiveSupport::Inflector.inflections.plurals.empty?
    assert !ActiveSupport::Inflector.inflections.singulars.empty?
    assert !ActiveSupport::Inflector.inflections.uncountables.empty?
  end

  def test_clear_all