Test bad request when resetting running connector

Author: Dugong42

api/src/test/java/io/kafbat/ui/KafkaConnectServiceTests.java

@@ -408,7 +408,7 @@ public void shouldReturn400WhenTryingToCreateConnectorWithExistingName() {
         .expectStatus()
         .isBadRequest();
   }
-    
+
   @Test
   public void shouldResetConnectorWhenInStoppedState() {
     webTestClient.put()
@@ -424,4 +424,15 @@ public void shouldResetConnectorWhenInStoppedState() {
         .expectStatus().isOk();
 
   }
+
+  @Test
+  public void shouldReturn400WhenResettingConnectorInRunningState() {
+
+    webTestClient.delete()
+        .uri("/api/clusters/{clusterName}/connectors/{connectName}/connectors/{connectorName}/offsets", LOCAL,
+            connectName, connectorName)
+        .exchange()
+        .expectStatus().isBadRequest();
+
+  }
 }