Unit test neo4j with TestNG - newImpermanentDatabase -

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when want create graphdatabaseservice in setup() method below:

      private graphdatabaseservice graphdb;        @beforemethod       public void setup() throws exception {         graphdb = new testgraphdatabasefactory().newimpermanentdatabase();       }

i error:

java.lang.abstractmethoderror: org.neo4j.test.impl.ephemeralfilesystemabstraction.autocreatepath(ljava/io/file;)v     @ org.neo4j.kernel.storelocker.lock(storelocker.java:73)     @ org.neo4j.kernel.internalabstractgraphdatabase.create(internalabstractgraphdatabase.java:287)     @ org.neo4j.kernel.internalabstractgraphdatabase.run(internalabstractgraphdatabase.java:227)     @ org.neo4j.kernel.embeddedgraphdatabase.<init>(embeddedgraphdatabase.java:79)     @ org.neo4j.test.impermanentgraphdatabase.<init>(impermanentgraphdatabase.java:78)     @ org.neo4j.test.testgraphdatabasefactory$1.newdatabase(testgraphdatabasefactory.java:46)     @ org.neo4j.graphdb.factory.graphdatabasebuilder.newgraphdatabase(graphdatabasebuilder.java:205)     @ org.neo4j.test.testgraphdatabasefactory.newimpermanentdatabase(testgraphdatabasefactory.java:36)     @ pl.piotr0123456.neo4j.operations.graphoperationstest.setup(graphoperationstest.java:29)

as workaround use:

     graphdb = new testgraphdatabasefactory().newembeddeddatabase("target/testgraph/test1");

with transaction rollback. think isn't solution.

is possible create each unit test clean graph in memory?

under hoods, impermanentgraphdatabase uses test-data/impermanent-db (in 1.9.rc2) on filesystem. either

  • make sure test-data/impermanent-db has sufficient permissions
  • instantiate impermanentgraphdatabase directly without factory: new org.neo4j.test.impermanentgraphdatabase(mystoredirectory). mystoredirectory temporary directory example.

be aware if run multiple tests in parallel. in case should use second approach since multiple impermanentgraphdatabase instances not allowed share same store directory.


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