Remove "You must answer at least ..." Message When default_percentage_answered is Set to Zero

app/views/plans/_share_form.html.erb

@@ -4,13 +4,21 @@
 <% administerable = @plan.administerable_by?(current_user.id) %>
 <% email_tooltip = _("Enter the email address of your collaborator: If they are already using #{ApplicationService.application_name}, they will see this plan on their dashboard, and recieve an email. If they are not currently using #{ApplicationService.application_name}, they will recieve an email inviting them to the tool so they can collaborate on your plan.") %>
 <% permissions_tooltip = _('Co-owner: Has admin-rights to the plan (can invite other users, view the plan, answer questions, or comment). Editor: Has edit-rights to the plan (can view the plan, answer questions, or comment). Read Only: Has read-rights to the plan (can view the plan or comment)') %>
+<% percentage = Rails.configuration.x.plans.default_percentage_answered %>
+<%# Only include "You must answer at least x% ..." if x is non-zero %>
+<% set_visibility_info = if percentage&.nonzero?
+                          _('Public or organisational visibility is intended for finished plans. You must answer at least %{percentage}%% of the questions to enable these options. Note: test plans are set to private visibility by default.') % { percentage: percentage }
+                        else
+                          _('Public or organisational visibility is intended for finished plans. Note: test plans are set to private visibility by default.')
+                        end
+%>
 
 <h2><%= _('Set plan visibility') %></h2>
 <% allow_visibility = @plan.visibility_allowed? %>
 <%= form_with model: @plan, id: "set_visibility" do |f| %>
   <fieldset<%= (allow_visibility ? '' : ' disabled') %>>
     <legend>
-      <p class="form-control-static"><%= _('Public or organisational visibility is intended for finished plans. You must answer at least %{percentage}%% of the questions to enable these options. Note: test plans are set to private visibility by default.') % { :percentage => Rails.configuration.x.plans.default_percentage_answered } %></p>
+      <p class="form-control-static"><%= set_visibility_info %></p>
     </legend>
     <div class="form-group col-xs-8">
       <div class="radio">

spec/views/plans/_share_form.html.erb_spec.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe 'plans/_share_form.html.erb' do
+  before(:each) do
+    @plan = create(:plan, :creator)
+    @user = @plan.owner
+    sign_in(@user)
+    @plan_roles = @plan.roles.where(active: true)
+  end
+
+  it 'Renders set_visibility_info correctly according to default_percentage_answered value' do
+    # Check what renders when default_percentage_answered is between 1 and 100
+    Rails.configuration.x.plans.default_percentage_answered = rand(1..100)
+    render partial: 'plans/share_form'
+    expect(rendered.include?(format(_('Public or organisational visibility is intended for finished plans. ' \
+                                      'You must answer at least %{percentage}%% of the questions to enable ' \
+                                      'these options. Note: test plans are set to private visibility by default.'),
+                                    percentage: Rails.configuration.x.plans.default_percentage_answered))).to eql(true)
+
+    # Check what renders when default_percentage_answered is 0
+    Rails.configuration.x.plans.default_percentage_answered = 0
+    render partial: 'plans/share_form'
+    expect(rendered.include?(_('Public or organisational visibility is intended for finished plans. ' \
+                               'Note: test plans are set to private visibility by default.'))).to eql(true)
+  end
+end