feat: Add support for response body validation

Resolves #17 (closed)

testing/src/main/java/org/eclipsefoundation/testing/helpers/TestCaseHelper.java

@@ -36,12 +36,24 @@ public class TestCaseHelper {
      * @return the desired endpoint test case
      */
     public static EndpointTestCase buildSuccessCase(String path, String[] params, String schemaLocation) {
+        return prepareSuccessCase(path, params, schemaLocation).build();
+    }
+
+    /**
+     * Creates an EndpointTestCase.builder to allow the user to add any extra test
+     * parameters. As well as overwrite any of the default success case parameters.
+     * 
+     * @param path           the endpoint URL
+     * @param params         the request path/query parameters
+     * @param schemaLocation the schema location
+     * @return the desired endpoint test case builder
+     */
+    public static EndpointTestCase.Builder prepareSuccessCase(String path, String[] params, String schemaLocation) {
         return EndpointTestCase.builder()
                 .setPath(path)
                 .setParams(Optional.of(params))
                 .setResponseContentType(ContentType.JSON)
-                .setSchemaLocation(schemaLocation)
-                .build();
+                .setSchemaLocation(schemaLocation);
     }
 
     /**
@@ -64,6 +76,23 @@ public class TestCaseHelper {
                 .build();
     }
 
+    /**
+     * Creates a EndpointTestCase object with the desired path and params.
+     * Used to test an unauthorized request. Status code 403 (Unauthorized) is
+     * assumed.
+     * 
+     * @param path   the endpoint URL
+     * @param params the request path/query parameters
+     * @return the desired endpoint test case
+     */
+    public static EndpointTestCase buildUnauthorizedCase(String path, String[] params) {
+        return EndpointTestCase.builder()
+                .setPath(path)
+                .setParams(Optional.of(params))
+                .setStatusCode(403)
+                .build();
+    }
+
     /**
      * Creates a EndpointTestCase object with the desired path and params.
      * Used to test a URL that doesn't exist. Status code 404 (Not Found) is