Fix #label specs with has_many associations and

improve #label test coverage.

Fixed specs: searches/labels for `has_many` associations
need to use pluralized model_name (was singularized).

Test for finding the translation when provided in the I18n file,
as well for correctly falling back (with coherent capitalization)
in different cases when no translation is provided.

Test with direct attributes (both one word and multi-word),
as well as with `has_many` and `belongs_to` associations.

To-do: improve Ransack I18n documentation.

spec/ransack/helpers/form_builder_spec.rb

@@ -43,31 +43,63 @@ module Ransack
       describe '#label' do
 
         context 'with direct model attributes' do
+
           it 'localizes attribute names' do
             html = @f.label :name_cont
             expect(html).to match /Full Name contains/
+            html = @f.label :only_admin_start
+            expect(html).to match /admin uSer Only starts with/
+            html = @f.label :salary_gt
+            expect(html).to match /wages greater than/
+            html = @f.label :awesome_true
+            expect(html).to match /ransack is really awesome is true/
           end
 
-          it 'falls back to column name when no translation' do
+          it 'falls back to `attribute_name.capitalize` when no translation' do
             html = @f.label :email_cont
             expect(html).to match /Email contains/
+            html = @f.label :only_sort_start
+            expect(html).to match /Only sort starts with/
+            html = @f.label :only_search_eq
+            expect(html).to match /Only search equals/
           end
+
         end
 
-        context 'with has_many association attributes' do
-          it 'falls back to associated model + column name when no translation' do
-            html = @f.label :article_title_cont
-            expect(html).to match /Article title contains/
+        context 'with `has_many` association attributes' do
+
+          it 'localizes "#{pluralized model}_#{attribute name}_#{predicate}"' do
+            html = @f.label :articles_body_start
+            expect(html).to match /Article maiN BoDy starts with/
           end
+
+          it 'falls back to `model_name.capitalize + attribute_name.capitalize` when no translation' do
+            html = @f.label :articles_title_cont
+            expect(html).to match /Article Title contains/
+            html = @f.label :articles_subject_header_start
+            expect(html).to match /Article Subject header starts with/
+          end
+
         end
 
-        context 'with belongs_to association attributes' do
-          it 'falls back to associated model + column name when no translation' do
+        context 'with `belongs_to` association attributes' do
+
+          it 'localizes "#{singularized model}_#{attribute name}_#{predicate}"' do
             @controller.view_context.search_form_for Comment.search do |f|
-              html = f.label :article_title_cont
-              expect(html).to match /Article Title contains/
+              html = f.label :article_body_start
+              expect(html).to match /Article maiN BoDy starts with/
             end
           end
+
+          it 'falls back to `model_name.capitalize + attribute_name.capitalize` when no translation' do
+            @controller.view_context.search_form_for Comment.search do |f|
+              html = f.label :article_title_eq
+              expect(html).to match /Article Title equals/
+              html = f.label :article_subject_header_end
+              expect(html).to match /Article Subject header ends with/
+            end
+          end
+
         end
 
       end

spec/support/en.yml

@@ -5,6 +5,11 @@ en:
     attributes:
       person:
         name: Full Name
+        only_admin: admin uSer Only
+        salary: wages
+        awesome: ransack is really awesome
+      article:
+        body: maiN BoDy
   activerecord:
     attributes:
       namespace/article:

spec/support/schema.rb

@@ -142,6 +142,7 @@ module Schema
       create_table :articles, :force => true do |t|
         t.integer :person_id
         t.string  :title
+        t.text    :subject_header
         t.text    :body
       end