Add ability to delete Maybe account (#698)

* Build out user deactivation and purging workflows

* Add i18n translations for user deletion

* Add tests for user deletion

* Fix lint issue

test/controllers/settings/profiles_controller_test.rb

@@ -4,8 +4,39 @@ class Settings::ProfilesControllerTest < ActionDispatch::IntegrationTest
   setup do
     sign_in @user = users(:family_admin)
   end
+
   test "get" do
     get settings_profile_url
     assert_response :success
   end
+
+  test "member can deactivate their account" do
+    sign_in @member = users(:family_member)
+    delete settings_profile_url
+
+    assert_redirected_to root_url
+
+    assert_not User.find(@member.id).active?
+    assert_enqueued_with(job: UserPurgeJob, args: [ @member ])
+  end
+
+  test "admin prevented from deactivating when other users are present" do
+    sign_in @admin = users(:family_admin)
+    delete settings_profile_url
+
+    assert_redirected_to settings_profile_url
+    assert_no_enqueued_jobs only: UserPurgeJob
+    assert User.find(@admin.id).active?
+  end
+
+  test "admin can deactivate their account when they are the last user in the family" do
+    sign_in @admin = users(:family_admin)
+    users(:family_member).destroy
+
+    delete settings_profile_url
+
+    assert_redirected_to root_url
+    assert_not User.find(@admin.id).active?
+    assert_enqueued_with(job: UserPurgeJob, args: [ @admin ])
+  end
 end