Proper use of JUnit APIs

Author: garydgregory

src/test/java/org/apache/commons/csv/issues/JiraCsv248Test.java

@@ -20,6 +20,7 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.io.IOException;
@@ -70,12 +71,7 @@ public void testJiraCsv248() throws IOException, ClassNotFoundException {
             assertFalse(rec.isSet("A"));
             assertEquals(0, rec.toMap().size());
             // This will throw
-            try {
-                rec.get("A");
-                org.junit.jupiter.api.Assertions.fail("Access by name is not expected after deserialisation");
-            } catch (final IllegalStateException expected) {
-                // OK
-            }
+            assertThrows(IllegalStateException.class, () -> rec.get("A"));
         }
     }
 }