java - Function works in main class but not it test class -

i have class compiles , runs expected (adds 1 test node per execution):

public class reqsdb {     private final string store_dir;     public graphdatabaseservice graphdb;      private static enum reltypes implements relationshiptype {         identifies, satifies     }      public reqsdb(string dbpath) {         store_dir = dbpath;         graphdb = new graphdatabasefactory().newembeddeddatabase(store_dir);         registershutdownhook(graphdb);     }      public void createtestnode() {         transaction tx = graphdb.begintx();         node newnode;         try {             newnode = graphdb.createnode();             newnode.setproperty("test", "test");             tx.success();         } {             tx.finish();         }     }      private static void registershutdownhook(final graphdatabaseservice graphdb) {         runtime.getruntime().addshutdownhook(new thread() {                     @override                     public void run() {                         graphdb.shutdown();                     }         });     }      void shutdown() {         graphdb.shutdown();     }      public static void main(string[] args) {         reqsdb testdb = new reqsdb("target/testdb");         testdb.createtestnode();     } } 

however test function, testcreatetestnode() causes error:

java.lang.runtimeexception: org.neo4j.kernel.lifecycle.lifecycleexception: component 'org.neo4j.kernel.storelockerlifecycleadapter@4e3a2be1' initialized, failed start. 

since function works called main(), think there wrong test class.

package com.github.dprentiss;  import junit.framework.test; import junit.framework.testcase; import junit.framework.testsuite;  public class reqsdbtest extends testcase {     protected reqsdb testdb = new reqsdb("target/testdb");      public reqsdbtest(string testname) {         super(testname);     }      public static test suite() {         return new testsuite(reqsdbtest.class);     }      public void testdbservice() {         assertnotnull(testdb);     }      public void testcreatetestnode() {         testdb.createtestnode();     }      public void teardown() {         testdb.shutdown();     } 

is there wrong test set up?

try put

protected reqsdb testdb = new reqsdb("target/testdb"); 

in init method . follow example:

is there basic template can use create test?