Fixed not serializable error when stopping/starting Tomcat

webgoat-container/src/test/java/org/owasp/webgoat/util/LabelManagerImplTest.java

@@ -0,0 +1,26 @@
+package org.owasp.webgoat.util;
+
+import org.junit.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+
+public class LabelManagerImplTest {
+
+    @Test
+    public void shouldSerialize() throws IOException {
+        LabelManagerImpl labelManager = new LabelManagerImpl(null);
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        ObjectOutputStream out = new ObjectOutputStream(bos);
+        out.writeObject(labelManager);
+    }
+
+    @Test
+    public void shouldSerializeWithLabelProvider() throws IOException {
+        LabelManagerImpl labelManager = new LabelManagerImpl(new LabelProvider());
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        ObjectOutputStream out = new ObjectOutputStream(bos);
+        out.writeObject(labelManager);
+    }
+}