NRL-1165 add feature test for regex validation on non-mandatory segments

Author: katebobyn-nhs

tests/features/producer/createDocumentReference-failure.feature

@@ -926,7 +926,7 @@ Feature: Producer - createDocumentReference - Failure Scenarios
       "coding": [
       {
       "system": " system",
-      "code": "1234",
+      "code": "1234"
       }
       ]
       }
@@ -948,9 +948,29 @@ Feature: Producer - createDocumentReference - Failure Scenarios
             }
             ]
         },
-        "diagnostics": "Request body could not be parsed (context.practiceSetting.coding[0].system: String should match pattern '[^\\s]+(\\s[^\\s]+)*')",
+        "diagnostics": "Request body could not be parsed (context.facilityType.coding[0].system: String should match pattern '[^\\s]+(\\s[^\\s]+)*')",
         "expression": [
-            "context.practiceSetting.coding[0].system"
+            "context.facilityType.coding[0].system"
+        ]
+      }
+      """
+    And the OperationOutcome contains the issue:
+      """
+      {
+        "severity": "error",
+        "code": "invalid",
+        "details": {
+            "coding": [
+            {
+                "system": "https://fhir.nhs.uk/ValueSet/Spine-ErrorOrWarningCode-1",
+                "code": "MESSAGE_NOT_WELL_FORMED",
+                "display": "Message not well formed"
+            }
+            ]
+        },
+        "diagnostics": "Request body could not be parsed (context.practiceSetting.coding[0].display: String should match pattern '[^\\s]+(\\s[^\\s]+)*')",
+        "expression": [
+            "context.practiceSetting.coding[0].display"
         ]
       }
       """