add specs for tags finder

app/controllers/projects/tags_controller.rb

 class Projects::TagsController < Projects::ApplicationController
   include SortingHelper
+
   # Authorize
   before_action :require_non_empty_project
   before_action :authorize_download_code!
@@ -7,7 +8,9 @@ class Projects::TagsController < Projects::ApplicationController
   before_action :authorize_admin_project!, only: [:destroy]
   def index
-    @sort = params[:sort] || 'name'
+    params[:sort] = params[:sort].presence || 'name'
+
+    @sort = params[:sort]
     @tags = TagsFinder.new(@repository, params).execute
     @tags = Kaminari.paginate_array(@tags).page(params[:page])

app/finders/tags_finder.rb

+class TagsFinder
+  def initialize(repository, params)
+    @repository = repository
+    @params = params
+  end
+
+  def execute
+    tags = @repository.tags_sorted_by(sort)
+    filter_by_name(tags)
+  end
+
+  private
+
+  def sort
+    @params[:sort].presence
+  end
+
+  def search
+    @params[:search].presence
+  end
+
+  def filter_by_name(tags)
+    if search
+      tags.select { |tag| tag.name.include?(search) }
+    else
+      tags
+    end
+  end
+end

app/views/projects/tags/index.html.haml

@@ -12,7 +12,8 @@
         = search_field_tag :search, params[:search], { placeholder: 'Filter by tag name', id: 'tag-search', class: 'form-control search-text-input input-short', spellcheck: false }
       .dropdown.inline
         %button.dropdown-toggle.btn{ type: 'button', data: { toggle: 'dropdown'} }
-          %span.light= @sort.humanize
+          %span.light
+            = @sort.humanize
           %b.caret
         %ul.dropdown-menu.dropdown-menu-align-right
           %li
@@ -22,7 +23,7 @@
               = sort_title_recently_updated
             = link_to filter_tags_path(sort: sort_value_oldest_updated) do
               = sort_title_oldest_updated
-      - if can? current_user, :push_code, @project
+      - if can?(current_user, :push_code, @project)
         = link_to new_namespace_project_tag_path(@project.namespace, @project), class: 'btn btn-create new-tag-btn' do
           New tag

spec/finders/tags_finder_spec.rb

+require 'spec_helper'
+
+describe TagsFinder do
+  let(:user) { create(:user) }
+  let(:project) { create(:project) }
+  let(:repository) { project.repository }
+
+  describe '#execute' do
+    context 'sort only' do
+      it 'sorts by name' do
+        tags_finder = described_class.new(repository, {})
+
+        result = tags_finder.execute
+
+        expect(result.first.name).to eq("v1.0.0")
+      end
+
+      it 'sorts by recently_updated' do
+        tags_finder = described_class.new(repository, { sort: 'updated_desc' })
+
+        result = tags_finder.execute
+        recently_updated_tag = repository.tags.max do |a, b|
+          repository.commit(a.target).committed_date <=> repository.commit(b.target).committed_date
+        end
+
+        expect(result.first.name).to eq(recently_updated_tag.name)
+      end
+
+      it 'sorts by last_updated' do
+        tags_finder = described_class.new(repository, { sort: 'updated_asc' })
+
+        result = tags_finder.execute
+
+        expect(result.first.name).to eq('v1.0.0')
+      end
+    end
+
+    context 'filter only' do
+      it 'filters tags by name' do
+        tags_finder = described_class.new(repository, { search: '1.0.0' })
+
+        result = tags_finder.execute
+
+        expect(result.first.name).to eq('v1.0.0')
+        expect(result.count).to eq(1)
+      end
+
+      it 'does not find any tags with that name' do
+        tags_finder = described_class.new(repository, { search: 'hey' })
+
+        result = tags_finder.execute
+
+        expect(result.count).to eq(0)
+      end
+    end
+
+    context 'filter and sort' do
+      it 'filters tags by name and sorts by recently_updated' do
+        params = { sort: 'updated_desc', search: 'v1' }
+        tags_finder = described_class.new(repository, params)
+
+        result = tags_finder.execute
+
+        expect(result.first.name).to eq('v1.1.0')
+        expect(result.count).to eq(2)
+      end
+
+      it 'filters tags by name and sorts by last_updated' do
+        params = { sort: 'updated_asc', search: 'v1' }
+        tags_finder = described_class.new(repository, params)
+
+        result = tags_finder.execute
+
+        expect(result.first.name).to eq('v1.0.0')
+        expect(result.count).to eq(2)
+      end
+    end
+  end
+end