Add request spec for www redirect

spec/requests/www_spec.rb

@@ -0,0 +1,14 @@
+require "rails_helper"
+
+RSpec.describe "www", type: :request do
+  before(:each) do
+    host! "www.example.com"
+  end
+
+  it "redirects www to root domain" do
+    get "/"
+
+    expect(response.status).to eq(301)
+    expect(response.headers["Location"]).to eq("http://example.com/")
+  end
+end