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Additional information on unit testing with CDAP is in the Developer Manual section on Testing a CDAP Application.
In addition, CDAP provides a hydrator-test module that contains several mock plugins for you to use in tests with your custom plugins. To use the module, add a dependency to your pom.xml:
| Code Block |
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<dependency>
<groupId>io.cdap.cdap</groupId>
<artifactId>hydrator-test</artifactId>
<version>${cdap.version}</version>
<scope>test</scope>
</dependency>
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Then extend the HydratorTestBase class, and create a method that will setup up the application artifact and mock plugins, as well as the artifact containing your custom plugins:
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/**
* Unit tests for our plugins.
*/
public class PipelineTest extends HydratorTestBase {
private static final ArtifactSummary APP_ARTIFACT = new ArtifactSummary("cdap-data-pipeline", "1.0.0");
@ClassRule
public static final TestConfiguration CONFIG = new TestConfiguration("explore.enabled", false);
@BeforeClass
public static void setupTestClass() throws Exception {
ArtifactId parentArtifact = NamespaceId.DEFAULT.artifact(APP_ARTIFACT.getName(), APP_ARTIFACT.getVersion());
// Add the data pipeline artifact and mock plugins.
setupBatchArtifacts(parentArtifact, DataPipelineApp.class);
// Add our plugins artifact with the data pipeline artifact as its parent.
// This will make our plugins available to the data pipeline.
addPluginArtifact(NamespaceId.DEFAULT.artifact("example-plugins", "1.0.0"),
parentArtifact,
TextFileSetSource.class,
TextFileSetSink.class,
WordCountAggregator.class,
WordCountCompute.class,
WordCountSink.class);
}
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You can then add test cases as you see fit. The cdap-data-pipeline-plugins-archetype includes an example of this unit test.