Add locale option, defaulting to I18n.locale

lib/enumlingo/helper.rb

@@ -3,23 +3,23 @@ def enumlingo(*attributes)
     attributes.each do |attribute|
       pluralized_attribute = attribute.to_s.pluralize
 
-      define_method "#{attribute}_lingo" do
+      define_method "#{attribute}_lingo" do |locale: I18n.locale|
         value = send(attribute)
         # return nil if value.nil?
-        I18n.t("activerecord.attributes.#{model_name.i18n_key}.#{pluralized_attribute}.#{value}")
+        I18n.t("activerecord.attributes.#{model_name.i18n_key}.#{pluralized_attribute}.#{value}", locale: locale)
       end
 
-      define_singleton_method "#{pluralized_attribute}_lingo" do
+      define_singleton_method "#{pluralized_attribute}_lingo" do |locale: I18n.locale|
         send(attribute.to_s.pluralize).map do |key, value|
-          [I18n.t("activerecord.attributes.#{model_name.i18n_key}.#{pluralized_attribute}.#{key}"), key]
+          [I18n.t("activerecord.attributes.#{model_name.i18n_key}.#{pluralized_attribute}.#{key}", locale: locale), key]
         end
       end
 
-      define_singleton_method "#{attribute}_lingo" do |key|
-        I18n.t("activerecord.attributes.#{model_name.i18n_key}.#{pluralized_attribute}.#{key}")
+      define_singleton_method "#{attribute}_lingo" do |key, locale: I18n.locale|
+        I18n.t("activerecord.attributes.#{model_name.i18n_key}.#{pluralized_attribute}.#{key}", locale: locale)
       end
 
-      define_singleton_method "#{pluralized_attribute}_lingo_values" do |locale = I18n.locale|
+      define_singleton_method "#{pluralized_attribute}_lingo_values" do |locale: I18n.locale|
         send(attribute.to_s.pluralize).map do |key, value|
           [I18n.t("activerecord.attributes.#{model_name.i18n_key}.#{pluralized_attribute}.#{key}", locale: locale), value]
         end

test/enumlingo_test.rb

@@ -1,51 +1,44 @@
 require "test_helper"
 
 class EnumlingoTest < ActiveSupport::TestCase
+  setup do
+    @book = products(:book)
+    @other = products(:other)
+  end
+
   test "it has a version number" do
     assert Enumlingo::VERSION
   end
 
   test "it return English product kind of book" do
-    I18n.locale = "en"
-    book = products(:book)
-
-    assert_equal "Book", book.kind_lingo
+    assert_equal "Book", @book.kind_lingo(locale: :en)
   end
 
   test "it return Chinese product kind of book" do
-    I18n.locale = "zh-CN"
-    book = products(:book)
-
-    assert_equal "书籍", book.kind_lingo
+    assert_equal "书籍", @book.kind_lingo(locale: "zh-CN")
   end
 
   test "it return missing translation of product kind of book" do
-    I18n.locale = "zh-CN"
-    book = products(:other)
-    assert_equal "Translation missing: zh-CN.activerecord.attributes.product.kinds.other", book.kind_lingo
+    assert_equal "Translation missing: zh-CN.activerecord.attributes.product.kinds.other", @other.kind_lingo(locale: "zh-CN")
   end
 
   test "it return options of product kind" do
-    I18n.locale = "en"
-    assert_equal [["Book", "book"], ["Food", "food"], ["Medical", "medical"], ["Other", "other"]], Product.kinds_lingo
+    assert_equal [["Book", "book"], ["Food", "food"], ["Medical", "medical"], ["Other", "other"]], Product.kinds_lingo(locale: :en)
   end
 
   test "it return options of product kind in Chinese" do
-    I18n.locale = "zh-CN"
-    assert_equal [["书籍", "book"], ["食品", "food"], ["药品", "medical"], ["Translation missing: zh-CN.activerecord.attributes.product.kinds.other", "other"]], Product.kinds_lingo
+    assert_equal [["书籍", "book"], ["食品", "food"], ["药品", "medical"], ["Translation missing: zh-CN.activerecord.attributes.product.kinds.other", "other"]], Product.kinds_lingo(locale: "zh-CN")
   end
 
   test "it return text of product kind" do
-    I18n.locale = "en"
-    assert_equal "Book", Product.kind_lingo(:book)
+    assert_equal "Book", Product.kind_lingo(:book, locale: :en)
   end
 
   test "it return text of product kind in Chinese" do
-    I18n.locale = "zh-CN"
-    assert_equal "书籍", Product.kind_lingo(:book)
+    assert_equal "书籍", Product.kind_lingo(:book, locale: "zh-CN")
   end
 
   test "return options of product kind value with custom translation" do
-    assert_equal [["Book", 0], ["Food", 1], ["Medical", 2], ["Other", 3]], Product.kinds_lingo_values(:en)
+    assert_equal [["Book", 0], ["Food", 1], ["Medical", 2], ["Other", 3]], Product.kinds_lingo_values(locale: :en)
   end
 end