fix: Implemented something to gracefully detect if PCAP libs are not available and to skip the tests related to that.

Author: chrisdutz

plc4j/transports/raw-socket/src/test/java/org/apache/plc4x/java/transport/rawsocket/RawSocketTransportTest.java

@@ -236,6 +236,9 @@ void testCreateTransportInstance_promiscuousMode() throws Exception {
 
     @Test
     void testCreateTransportInstance_invalidInterface() {
+        // Constructing the instance reaches pcap's native layer, so skip when it's unavailable.
+        PcapTestSupport.findAllDevsOrSkip();
+
         RawSocketTransportConfiguration config = new RawSocketTransportConfiguration();
         config.interfaceName = "INVALID_INTERFACE_THAT_DOES_NOT_EXIST";
         config.remoteAddress = "00:00:00:00:00:01";