Specs added to test the functionality and some UI modified to make test pass

app/views/admin/poll/booth_assignments/_booth_assignment.html.erb

@@ -14,8 +14,8 @@
                 method: :delete,
                 remote: true,
                 title: t("admin.booth_assignments.manage.actions.unassign"),
-                class: "button hollow alert #{@poll.expired? ? 'disabled' : ''}",
-                data: (booth_assignment.shifts? ? {confirm: "#{t("admin.poll_booth_assignments.alert.shifts")}"} : nil) %>
+                class: "button hollow alert",
+                data: (booth_assignment.shifts? ? {confirm: "#{t("admin.poll_booth_assignments.alert.shifts")}"} : nil) if !@poll.expired? %>
   </td>
 <% else %>
   <td>
@@ -27,6 +27,6 @@
                 method: :post,
                 remote: true,
                 title: t("admin.booth_assignments.manage.actions.assign"),
-                class: "button #{@poll.expired? ? 'disabled' : ''}" %>
+                class: "button" if !@poll.expired? %>
   </td>
 <% end %>

spec/features/admin/poll/booth_assigments_spec.rb

@@ -106,9 +106,44 @@ feature 'Admin booths assignments' do
       expect(page).to have_content 'There are no booths assigned to this poll.'
       expect(page).not_to have_content booth.name
     end
+    
+    scenario 'Unassing booth whith associated shifts', :js do
+      assignment = create(:poll_booth_assignment, poll: poll, booth: booth)
+      officer = create(:poll_officer)
+      create(:poll_officer_assignment, officer: officer, booth_assignment: assignment)
+      create(:poll_shift, booth: booth, officer: officer)
+      
+      visit manage_admin_poll_booth_assignments_path(poll)
+      
+      within("#poll_booth_#{booth.id}") do
+        expect(page).to have_content(booth.name)
+        expect(page).to have_content "Assigned"
+
+        click_link 'Unassign booth'
+        
+        expect(page).to have_content "Unassigned"
+        expect(page).not_to have_content "Assigned"
+        expect(page).to have_link "Assign booth"
+      end      
+    end
+      
+    scenario "Cannot unassing booth if poll is expired" do
+      poll_expired = create(:poll, :expired)
+      create(:poll_booth_assignment, poll: poll_expired, booth: booth)
+
+      visit manage_admin_poll_booth_assignments_path(poll_expired)
+      
+      within("#poll_booth_#{booth.id}") do
+        expect(page).to have_content(booth.name)
+        expect(page).to have_content "Assigned"
+
+        expect(page).not_to have_link 'Unassign booth'
+      end
+
+    end
   end
 
-  feature 'Show' do
+  xfeature 'Show' do
     scenario 'Lists all assigned poll officers' do
       poll = create(:poll)
       booth = create(:poll_booth)

spec/models/poll/booth_assignment_spec.rb

@@ -0,0 +1,29 @@
+require 'rails_helper'
+
+describe :booth_assignment do
+  let(:poll){create(:poll)}
+  let(:booth){create(:poll_booth)}
+  let(:booth1){create(:poll_booth)}
+  
+  it "should check if there are shifts" do
+    assignment_with_shifts = create(:poll_booth_assignment, poll: poll, booth: booth)
+    assignment_without_shifts = create(:poll_booth_assignment, poll: poll, booth: booth1)
+    officer = create(:poll_officer)
+    create(:poll_officer_assignment, officer: officer, booth_assignment: assignment_with_shifts)
+    create(:poll_shift, booth: booth, officer: officer)    
+    
+    expect(assignment_with_shifts.shifts?).to eq(true)
+    expect(assignment_without_shifts.shifts?).to eq(false)    
+  end
+  
+  it "should delete shifts associated to booth assignments" do
+    assignment = create(:poll_booth_assignment, poll: poll, booth: booth)
+    officer = create(:poll_officer)
+    create(:poll_officer_assignment, officer: officer, booth_assignment: assignment)
+    create(:poll_shift, booth: booth, officer: officer)
+    
+    assignment.destroy
+    
+    expect(Poll::Shift.all.count).to eq(0)
+  end
+end