Neo4j procedure testing and test server - testing

Question

I'm creating a Neo4J procedure to import RDF data. The RDF data has a few complex structure information and I write the tests to cover every case (some triples creates labels, some properties, some relations...etc..).
The procedures are written in Kotlin.
It works fine, and actually each test when executed individually succeeds. but when I run the whole test case at one, I get one success then all other tests fails with the exception:
org.neo4j.kernel.impl.core.ThreadToStatementContextBridge$BridgeDatabaseShutdownException: This database is shutdown.
I'm new to Neo4J and I struggle to find good examples, here is the structure of a test case:
package mypackage
import org.junit.Assert
import org.junit.Rule
import org.junit.Test
import org.neo4j.driver.internal.value.NullValue
import org.neo4j.driver.v1.Config
import org.neo4j.driver.v1.GraphDatabase
import org.neo4j.harness.junit.Neo4jRule
import java.io.File
import java.net.URI
class PropertyParserTest {
// this rule starts a Neo4j instance
#Rule
#JvmField
var neo4j: Neo4jRule = Neo4jRule()
// This is the procedure/function to test
.withProcedure(Mypackage::class.java)
#Test
#Throws(Throwable::class)
fun shouldSetTheNameCorrectly() {
GraphDatabase.driver(neo4j.boltURI(), Config.build().withoutEncryption().toConfig()).use({ driver ->
driver.session().use({ session ->
// Given
val path: String = File("src/test/resources/test_rdf__1.ttl").getAbsolutePath()
val testFile = File(path)
val urlTestFile: URI = testFile.toURI()
session.run("CALL mypackage.import('${urlTestFile}')")
// When
val result = session.run("MATCH (n) WHERE n:Person RETURN n.name as name")
// Then
var rec = result.next()
Assert.assertEquals("Manuel, Niklaus (Niclaus)", rec.get("name").asString())
rec = result?.next()
Assert.assertEquals("Fischli / Weiss", rec.get("name").asString())
rec = result?.next()
Assert.assertEquals("Hodler, Ferdinand", rec.get("name").asString())
})
})
}
#Test
#Throws(Throwable::class)
fun shouldSetTheAlternateNameCorrectly() {
GraphDatabase.driver(neo4j?.boltURI(), Config.build().withoutEncryption().toConfig()).use({ driver ->
driver.session().use({ session ->
// Given
val path: String = File("src/test/resources/test_rdf_2.ttl").absolutePath
val testFile = File(path)
val urlTestFile: URI = testFile.toURI()
session.run("CALL mypackage.import('${urlTestFile}')")
// When
val result = session.run("MATCH (n) WHERE n:Person RETURN n.name as name, n.alternate_names as alternate_names")
// Then
var rec = result.next()
Assert.assertEquals("Holbein, Hans", rec.get("name").asString())
var alternateNames = rec.get("alternate_names").asList()
Assert.assertEquals(9, alternateNames.size)
Assert.assertEquals("Holpenius, Joannes", alternateNames[0])
Assert.assertEquals("Olpenius, Hans", alternateNames[8])
rec = result.next()
Assert.assertEquals("Manuel, Niklaus (Niclaus)", rec.get("name").asString())
alternateNames = rec.get("alternate_names").asList()
Assert.assertEquals(8, alternateNames.size)
rec = result.next()
Assert.assertEquals("Fischli / Weiss", rec.get("name").asString())
Assert.assertTrue(rec.get("alternate_names") is NullValue)
rec = result.next()
Assert.assertEquals("Hodler, Ferdinand", rec.get("name").asString())
Assert.assertTrue(rec.get("alternate_names") is NullValue)
rec = result.next()
Assert.assertEquals("Holbein", rec.get("name").asString())
alternateNames = rec.get("alternate_names").asList()
Assert.assertEquals(3, alternateNames.size)
})
})
}
}
Any idea ? I'm using this code base as starting point : https://github.com/jbarrasa/neosemantics/blob/3.3/src/test/java/semantics/RDFImportTest.java

Answer 1

ok I've actually found a code in my procedure executing outside a transaction and I think this may be the cause of the problem. When I group everything in a single transaction, I don't have this problem anymore.
I'm not entirely sure why it works for individual tests and fails when running the whole test case, but this works now.