dosubot[bot] commented on issue #2558:
URL:
https://github.com/apache/incubator-hugegraph/issues/2558#issuecomment-2154795821
<!-- Answer -->
To resolve the `java.lang.AssertionError` indicating that 'gremlin-groovy is
not an available GremlinScriptEngine' when running `GremlinApiTests` on
HugeGraph, follow these steps:
1. **Ensure Dependencies**: Add the `gremlin-groovy` dependency to your
`pom.xml` if you are using Maven:
```xml
<dependency>
<groupId>org.apache.tinkerpop</groupId>
<artifactId>gremlin-groovy</artifactId>
<version>3.4.10</version> <!-- Use the appropriate version -->
</dependency>
```
2. **Check Configuration**: Verify that the `gremlin-groovy` script engine
is correctly configured in your HugeGraph server configuration. Ensure that the
`gremlin-groovy` script engine is listed in the `scriptEngines` configuration
in `gremlin-server.yaml`:
```yaml
scriptEngines: {
gremlin-groovy: {
plugins: {
org.apache.hugegraph.plugin.HugeGraphGremlinPlugin: {},
org.apache.tinkerpop.gremlin.server.jsr223.GremlinServerGremlinPlugin: {},
org.apache.tinkerpop.gremlin.jsr223.ImportGremlinPlugin: {
classImports: [
java.lang.Math,
org.apache.hugegraph.backend.id.IdGenerator,
org.apache.hugegraph.type.define.Directions,
org.apache.hugegraph.type.define.NodeRole,
org.apache.hugegraph.traversal.algorithm.CollectionPathsTraverser,
org.apache.hugegraph.traversal.algorithm.CountTraverser,
org.apache.hugegraph.traversal.algorithm.CustomizedCrosspointsTraverser,
org.apache.hugegraph.traversal.algorithm.CustomizePathsTraverser,
org.apache.hugegraph.traversal.algorithm.FusiformSimilarityTraverser,
org.apache.hugegraph.traversal.algorithm.HugeTraverser,
org.apache.hugegraph.traversal.algorithm.JaccardSimilarTraverser,
org.apache.hugegraph.traversal.algorithm.KneighborTraverser,
org.apache.hugegraph.traversal.algorithm.KoutTraverser,
org.apache.hugegraph.traversal.algorithm.MultiNodeShortestPathTraverser,
org.apache.hugegraph.traversal.algorithm.NeighborRankTraverser,
org.apache.hugegraph.traversal.algorithm.PathsTraverser,
org.apache.hugegraph.traversal.algorithm.PersonalRankTraverser,
org.apache.hugegraph.traversal.algorithm.SameNeighborTraverser,
org.apache.hugegraph.traversal.algorithm.ShortestPathTraverser,
org.apache.hugegraph.traversal.algorithm.SingleSourceShortestPathTraverser,
org.apache.hugegraph.traversal.algorithm.SubGraphTraverser,
org.apache.hugegraph.traversal.algorithm.TemplatePathsTraverser,
org.apache.hugegraph.traversal.algorithm.steps.EdgeStep,
org.apache.hugegraph.traversal.algorithm.steps.RepeatEdgeStep,
org.apache.hugegraph.traversal.algorithm.steps.WeightedEdgeStep,
org.apache.hugegraph.traversal.optimize.Text,
org.apache.hugegraph.traversal.optimize.TraversalUtil,
org.apache.hugegraph.util.DateUtil
],
methodImports: [java.lang.Math#*]
},
org.apache.tinkerpop.gremlin.jsr223.ScriptFileGremlinPlugin: {
files: [scripts/empty-sample.groovy]
}
}
}
}
```
3. **Initialize Script Engine**: Ensure that the script engine is
initialized properly in your test setup. You might need to explicitly
initialize the `gremlin-groovy` script engine before running the tests:
```java
import
org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine;
import javax.script.ScriptEngineManager;
public class GremlinApiTest extends BaseApiTest {
static {
// Initialize the GremlinGroovyScriptEngine
ScriptEngineManager manager = new ScriptEngineManager();
manager.registerEngineName("gremlin-groovy", new
GremlinGroovyScriptEngine());
}
// Your test methods
}
```
4. **Set Language in GremlinRequest**: Ensure that your `GremlinRequest`
class in `GremlinAPI` is correctly setting the language to `gremlin-groovy`:
```java
public static class GremlinRequest implements Checkable {
@JsonProperty
private String gremlin;
@JsonProperty
private Map<String, Object> bindings = new HashMap<>();
@JsonProperty
private String language = "gremlin-groovy";
@JsonProperty
private Map<String, String> aliases = new HashMap<>();
// Other methods...
}
```
By ensuring that the `gremlin-groovy` dependency is included, the script
engine is properly initialized and configured, and the `GremlinRequest` class
is correctly set up, you should be able to resolve the
`java.lang.AssertionError` and run your `GremlinApiTests` successfully
<sup>[[1]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-test/src/main/java/org/apache/hugegraph/api/GremlinApiTest.java)</sup><sup>[[2]](https://github.com/apache/incubator-hugegraph-toolchain/blob/master/hugegraph-tools/assembly/travis/conf/gremlin-server.yaml)</sup><sup>[[3]](https://github.com/apache/incubator-hugegraph-toolchain/blob/master/hugegraph-client/assembly/travis/conf/gremlin-server.yaml)</sup><sup>[[4]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/api/job/GremlinAPI.java)</sup>.
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