Add hyperlink to show resource from collection table (thoughtbot#727)

Allows a resource to be shown without javascript enabled
(which uses "data-url" attrs). Also facilitates faster tests using RackTest.

app/assets/stylesheets/administrate/components/_table.scss

@@ -21,3 +21,11 @@
 .table__action--destroy {
   color: $light-red;
 }
+
+.table__link-plain {
+  color: inherit;
+
+  &:hover {
+    color: inherit;
+  }
+}

app/views/administrate/application/_collection.html.erb

@@ -60,7 +60,11 @@ to display a collection of resources in an HTML table.
           >
         <% collection_presenter.attributes_for(resource).each do |attribute| %>
           <td class="cell-data cell-data--<%= attribute.html_class %>">
-            <%= render_field attribute %>
+            <a href="<%= polymorphic_path([namespace, resource]) -%>"
+               class="action-show table__link-plain"
+               >
+              <%= render_field attribute %>
+            </a>
           </td>
         <% end %>
 

spec/features/index_page_spec.rb

@@ -22,6 +22,15 @@
     expect(page).to have_content(customer.email)
   end
 
+  it "links to the customer show page without javascript", js: false do
+    customer = create(:customer)
+
+    visit admin_customers_path
+    click_show_link_for(customer)
+
+    expect(page).to have_header(displayed(customer))
+  end
+
   it "links to the edit page" do
     customer = create(:customer)
 

spec/support/table.rb

@@ -5,6 +5,12 @@ def click_row_for(model)
     end
   end
 
+  def click_show_link_for(model)
+    within(row_css_for(model)) do
+      all(show_link_elements).first.click
+    end
+  end
+
   private
 
   def row_css_for(model)
@@ -15,6 +21,10 @@ def clickable_table_elements
     ".cell-data--string, .cell-data--number"
   end
 
+  def show_link_elements
+    ".action-show"
+  end
+
   def url_for(model)
     "/" + [
       :admin,