additional solution

challenger/src/main/java/uk/co/compendiumdev/challenge/challenges/definitions/PostChallenges.java

@@ -113,9 +113,12 @@ public static ChallengeDefinitionData postTodosInvalidExtraField400(int challeng
                 "Issue a POST request to create a todo but fail validation because your payload contains an unrecognised field.");
 
         aChallenge.addHint("Try to create a todo with a title, description and a priority");
-//        aChallenge.addSolutionLink("Read Solution", "HREF", "https://www.eviltester.com/apichallenges/howto/post-todos-400");
+
+        aChallenge.addSolutionLink("Send a POST request to /todos with a priority field e.g. {\"title\":\"a title\",\"priority\":\"extra\"}", "", "");
+        aChallenge.addSolutionLink("Read Solution", "HREF", "/apichallenges/solutions/post-create/post-todos-400-extra-field");
+
 //        aChallenge.addSolutionLink("Watch Insomnia Solution", "YOUTUBE", "tlye5bQ72g0");
-        // TODO: create solution for unrecognised field names
+        // TODO: create video solution for unrecognised field names
         return aChallenge;
     }
 

challenger/src/main/resources/content/apichallenges/solutions.md

@@ -33,7 +33,7 @@ description: A list of all the solutions for the API Challenges. Try them yourse
 - [POST /todos (400) description too long](/apichallenges/solutions/post-create/post-todos-400-description-too-long)
 - [POST /todos (201) max out content](/apichallenges/solutions/post-create/post-todos-201-max-content)
 - [POST /todos (413) content too long](/apichallenges/solutions/post-create/post-todos-413-content-too-long)
-- POST /todos (400) extra
+- [POST /todos (400) extra](/apichallenges/solutions/post-create/post-todos-400-extra-field)
 
 ## Creation Challenges with PUT
 

challenger/src/main/resources/content/apichallenges/solutions/post-create/post-todos-400-extra-field.md

@@ -0,0 +1,94 @@
+---
+date:  2021-01-30T15:55:00Z
+title: API Challenges Solution For - POST todos 400 extra
+description: How to solve API challenge POST todos 400 extra to trigger validation errors due to an extra field in the payload.
+---
+
+# How to complete the challenge `POST /todos (400) extra`
+
+How to complete the challenge `POST /todos (400) extra` to fail to create a todo item in the application due to not passing validation when the payload contains an extra field.
+
+## POST /todos (400) extra
+
+> Issue a POST request to create a todo but fail validation due to an unrecognised field
+
+- `POST` request will create a todo if the details are valid when using the `/todos` end point
+- `400` is an error code meaning that we supplied invalid details
+- In this case we are asked to make a mistake by adding an extra field not defined in the request schema e.g. `priority="extra"`
+
+## Basic Instructions
+
+- Issue a `POST` request to end point "/todos"
+    - `{{<ORIGIN_URL>}}/todos`
+- The request should have an `X-CHALLENGER` header to track challenge completion
+- The `content-type` in the message should be `application/json` because we are sending a JSON payload
+- The Payload should have an error due to an unexpected field.
+
+```json
+{
+  "title": "a title",
+  "priority": "extra"
+}
+```
+- The response status code should be `400` because the request is invalid
+- The body of the response will be an error message array with a single message
+
+```json
+{
+  "errorMessages": [
+    "Could not find field: priority"
+  ]
+}
+```
+
+Hints:
+
+- We don't just want to check for mandatory and missing content we need to make sure that the server does not try and create entities and inject new fields into the database
+- For follow on exercises you might want to see what happens:
+   - if we duplicate fields e.g. have two `title` fields
+   - if we duplicate headers
+- When testing APIS we need to go beyond field contents and look at the message format itself
+
+## Example Request
+
+~~~~~~~~
+> POST /todos HTTP/1.1
+> Host: {{<HOST_URL>}}
+> User-Agent: rest-client
+> X-CHALLENGER: x-challenger-guid
+> Content-Type: application/json
+> Accept: */*
+> Content-Length: 116
+
+|     {
+|       "title": "a title",
+|       "priority": "extra"
+|     }
+~~~~~~~~
+
+## Example Response
+
+~~~~~~~~
+< HTTP/1.1 400 Bad Request
+< Connection: close
+< Date: Thu, 27 Aug 2020 14:23:12 GMT
+< Content-Type: application/json
+< X-Challenger: x-challenger-guid
+< Server: Jetty(9.4.z-SNAPSHOT)
+< Via: 1.1 vegur
+~~~~~~~~
+
+Returned body:
+
+```json
+{
+  "errorMessages": [
+    "Could not find field: priority"
+  ]
+}
+```
+
+
+
+
+