TSK-1822: fix error message for wrong order parameter

rest/taskana-rest-spring/src/main/java/pro/taskana/common/rest/TaskanaRestExceptionHandler.java

@@ -222,7 +222,8 @@ public class TaskanaRestExceptionHandler extends ResponseEntityExceptionHandler
           // value for the error output and want to use the contains performance boost of a HashSet.
           List<String> enumConstants =
               Arrays.stream(targetType.getEnumConstants())
-                  .map(Object::toString)
+                  .map(Enum.class::cast)
+                  .map(Enum::name)
                   .collect(Collectors.toList());
           Set<String> enumConstantSet = new HashSet<>(enumConstants);
 

rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerIntTest.java

@@ -1092,6 +1092,25 @@ class TaskControllerIntTest {
         .isEqualTo(HttpStatus.BAD_REQUEST);
   }
 
+  @Test
+  void should_ThrowException_When_ProvidingInvalidOrder() {
+    String url =
+        restHelper.toUrl(RestEndpoints.URL_TASKS)
+            + "?workbasket-id=WBI:100000000000000000000000000000000001"
+            + "&sort-by=NAME&order=WRONG";
+    HttpEntity<Object> auth = new HttpEntity<>(RestHelper.generateHeadersForUser("teamlead-1"));
+
+    ThrowingCallable httpCall =
+        () -> TEMPLATE.exchange(url, HttpMethod.GET, auth, TASK_SUMMARY_PAGE_MODEL_TYPE);
+
+    assertThatThrownBy(httpCall)
+        .isInstanceOf(HttpStatusCodeException.class)
+        .hasMessageContaining("\"expectedValues\":[\"ASCENDING\",\"DESCENDING\"]")
+        .extracting(HttpStatusCodeException.class::cast)
+        .extracting(HttpStatusCodeException::getStatusCode)
+        .isEqualTo(HttpStatus.BAD_REQUEST);
+  }
+
   @TestFactory
   Stream<DynamicTest> should_SetTransferFlagDependentOnRequestBody_When_TransferringTask() {
     Iterator<Boolean> iterator = Arrays.asList(true, false).iterator();