enhance JSON processing error message

Author: fslevoaca-ionos

src/main/java/com/cucumber/tutorial/util/PlainHttpResponseUtils.java

@@ -31,8 +31,12 @@ public static PlainHttpResponse from(String content) {
         try {
             return mapper.readValue(content, PlainHttpResponse.class);
         } catch (JsonProcessingException e) {
-            throw new RuntimeException("Cannot convert to PlainHttpResponse object:\n" + content, e);
-        }
+            throw new RuntimeException("Cannot convert to PlainHttpResponse object:\n" + content+"\n\nExpected:\n{\n" +
+                    "  [optional] \"status\": <object>,\n" +
+                    "  [optional] \"reason\": \"<text>\",\n" +
+                    "  [optional] \"body\": <object>,\n" +
+                    "  [optional] \"headers\": <json array> ex: [ {\"h1\": \"v1\"}, {\"h2\": \"v2\"} ]\n" +
+                    "}", e);        }
     }
 
     public static PlainHttpResponse from(ClassicHttpResponse response) {