Refactor excpetion test

theodolite/src/test/kotlin/theodolite/benchmark/ConfigMapResourceSetTest.kt

@@ -13,6 +13,7 @@ import junit.framework.Assert.assertEquals
 import org.junit.jupiter.api.AfterEach
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
 import theodolite.k8s.CustomResourceWrapper
 import theodolite.k8s.resourceLoader.K8sResourceLoaderFromFile
 import theodolite.util.DeploymentFailedException
@@ -211,16 +212,12 @@ class ConfigMapResourceSetTest {
     }
 
 
-    @Test()
+    @Test
     fun testConfigMapNotExist() {
         val resourceSet = ConfigMapResourceSet()
         resourceSet.name = "test-configmap1"
-        lateinit var ex: Exception
-        try {
+        assertThrows<DeploymentFailedException> {
             resourceSet.getResourceSet(server.client)
-        } catch (e: Exception) {
-            ex = e
         }
-        assertTrue(ex is DeploymentFailedException)
     }
 }
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