Add 'Delete All' button to web UI

lib/sidekiq_unique_jobs/web.rb

@@ -31,6 +31,11 @@ def self.registered(app) # rubocop:disable Metrics/MethodLength
         erb(unique_template(:unique_digests))
       end
 
+      app.get "/unique_digests/delete_all" do
+        Digests.del(pattern: "*", count: Digests.count)
+        redirect_to :unique_digests
+      end
+
       app.get "/unique_digests/:digest" do
         @digest = params[:digest]
         @unique_keys = Util.keys("#{@digest}*", 1000)

lib/sidekiq_unique_jobs/web/views/unique_digests.erb

@@ -38,5 +38,9 @@
         </tr>
       <% end %>
     </table>
+
+    <form action="<%= root_path %>unique_digests/delete_all" method="get">
+      <input class="btn btn-danger btn-xs" type="submit" name="delete_all" value="<%= t('DeleteAll') %>" data-confirm="<%= t('AreYouSure') %>" />
+    </form>
   </div>
 <% end %>

spec/integration/sidekiq_unique_jobs/web_spec.rb

@@ -65,4 +65,22 @@ def app
 
     expect(SidekiqUniqueJobs::Digests.all).to match_array([another_digest])
   end
+
+  it 'can delete all digests' do
+    expect(MyUniqueJob.perform_async(1, 2)).not_to eq(nil)
+    expect(MyUniqueJob.perform_async(2, 3)).not_to eq(nil)
+
+    expect(SidekiqUniqueJobs::Digests.all).to match_array(expected_digests)
+
+    get "/unique_digests/delete_all"
+    expect(last_response.status).to eq(302)
+
+    follow_redirect!
+
+    expect(last_request.url).to end_with('/unique_digests')
+    expect(last_response.body).not_to match("/unique_digests/#{digest}")
+    expect(last_response.body).not_to match("/unique_digests/#{another_digest}")
+
+    expect(SidekiqUniqueJobs::Digests.all).to be_empty
+  end
 end