Add footer core compontent test

Author: p_doub

spec/usage/components/footer_spec.rb

@@ -0,0 +1,40 @@
+require_relative '../../support/utils'
+include Utils
+
+describe 'Footer Component', type: :feature, js: true do
+
+  it 'Example 1' do
+
+    class ExamplePage < Page::Cell::Page
+
+      def response
+        components {
+          # simple footer tag
+          footer do
+            plain 'hello world!'
+          end
+
+          # advanced footer tag
+          footer id: 'my-unique-footer', class: 'awesome-footer' do
+            pg class: 'footer-text', text: 'hello world!'
+          end
+        }
+      end
+
+    end
+
+    visit "/example"
+
+    static_output = page.html
+
+    expected_static_output = <<~HTML
+    <footer>hello world!</footer>
+    <footer id="my-unique-footer" class="awesome-footer">
+      <p class="footer-text">hello world!</p>
+    </footer>
+    HTML
+
+    expect(stripped(static_output)).to include(stripped(expected_static_output))
+  end
+
+end