test: add tests for the NHS number on the patient session page

Author: MartinVanIJcken

spec/components/app_patient_summary_component_spec.rb

@@ -19,6 +19,21 @@
 
   it { should have_content("SELDON, Hari") }
 
+  it { should have_content("NHS number") }
+
+  context "when patient has an NHS number" do
+    before { patient.update(nhs_number: "9993425389") }
+
+    it { should have_content("999 342 5389") }
+    it { should_not have_link("Add the child's NHS number") }
+  end
+
+  context "when patient does not have an NHS number" do
+    before { patient.update(nhs_number: nil) }
+
+    it { should have_link("Add the child's NHS number") }
+  end
+
   it { should have_content("Date of birth") }
   it { should have_content("1 January 2000") }