Unit test filter module

app/views/users/index.html.erb

@@ -1,4 +1,8 @@
-<% title = "Your organisation (Users)" %>
+<% if @searched.present? %>
+  <% search_title = " (search results for ‘#{@searched})’" %>
+<% end %>
+<% title = "Your organisation (Users)#{search_title}" %>
+
 <% content_for :title, title %>
 
 <% content_for :tab_title do %>

spec/controllers/modules/users_filter_spec.rb

@@ -0,0 +1,30 @@
+require "rails_helper"
+
+RSpec.describe Modules::UsersFilter do
+  describe "filtered_users" do
+    before do
+      FactoryBot.create_list(:user, 5)
+      FactoryBot.create(:user, name: "Joe Blogg")
+      FactoryBot.create(:user, name: "Tom Blogg", active: false)
+    end
+
+    subject(:instance) { Class.new.include(described_class).new }
+    let(:user_list) { User.all }
+
+    context "when given a search term" do
+      let(:search_term) { "Blogg" }
+
+      it "filters the collection on search term and active users" do
+        expect(instance.filtered_users(user_list, search_term).count).to eq(1)
+      end
+    end
+
+    context "when not given a search term" do
+      let(:search_term) { nil }
+
+      it "filters the collection on active users" do
+        expect(instance.filtered_users(user_list, search_term).count).to eq(6)
+      end
+    end
+  end
+end