To run integration tests, you have to specify the druid cluster the tests should use.
Druid comes with the mvn profile integration-tests for setting up druid running in docker containers, and using that cluster to run the integration tests.
To use a druid cluster that is already running, use the mvn profile int-tests-config-file, which uses a configuration file describing the cluster.
Before starting, if you don't already have docker on your machine, install it as described on Docker installation instructions. Ensure that you have at least 4GB of memory allocated to the docker engine. (You can verify it under Preferences > Advanced.)
Also set the DOCKER_IP environment variable to localhost on your system, as follows:
export DOCKER_IP=127.0.0.1
To run all tests from a test group using docker and mvn run the following command: (list of test groups can be found at integration-tests/src/test/java/org/apache/druid/tests/TestNGGroup.java)
mvn verify -P integration-tests -Dgroups=<test_group>
To run only a single test using mvn run the following command:
mvn verify -P integration-tests -Dit.test=<test_name>
Add -rf :druid-integration-tests when running integration tests for the second time or later without changing the code of core modules in between to skip up-to-date checks for the whole module dependency tree.
Integration tests can also be run with either Java 8 or Java 11 by adding -Djvm.runtime=# to mvn command, where # can either be 8 or 11.
Druid's configuration (using Docker) can be overrided by providing -Doverride.config.path=<PATH_TO_FILE>. The file must contain one property per line, the key must start with druid_ and the format should be snake case.
When writing integration tests, it can be helpful to test against a quickstart cluster so that you can set up remote debugging with in your developer environment. This section walks you through setting up the integration tests so that it can run against a quickstart cluster running on your development machine.
Note that not all features run by default on a quickstart cluster, so it may not make sense to run the entire test suite against this configuration.
Make sure you have at least 6GB of memory available before you run the tests.
The tests rely on files in the test/resources folder to exist under the path /resources, so create a symlink to make them available
ln -s ${DRUID_HOME}/integration-tests/src/test/resources /resources
Set the cluster config file environment variable to the quickstart config
export CONFIG_FILE=${DRUID_HOME}/integration-tests/quickstart-it.json
Note that quickstart does not run with ssl, so to trick the integration tests we specify the *_tls_url in the config to be the same as the http url
Then run the tests using a command similar to
mvn verify -P int-tests-config-file -Dit.test=<test_name>
Make sure that you have at least 6GB of memory available before you run the tests.
To run tests on any druid cluster that is already running, create a configuration file:
{
"broker_host": "<broker_ip>",
"broker_port": "<broker_port>",
"router_host": "<router_ip>",
"router_port": "<router_port>",
"indexer_host": "<indexer_ip>",
"indexer_port": "<indexer_port>",
"coordinator_host": "<coordinator_ip>",
"coordinator_port": "<coordinator_port>",
"middlemanager_host": "<middle_manager_ip>",
"zookeeper_hosts": "<comma-separated list of zookeeper_ip:zookeeper_port>",
"cloud_bucket": "<(optional) cloud_bucket for test data if running cloud integration test>",
"cloud_path": "<(optional) cloud_path for test data if running cloud integration test>",
}
Set the environment variable CONFIG_FILE to the name of the configuration file:
export CONFIG_FILE=<config file name>
To run all tests from a test group using mvn run the following command: (list of test groups can be found at integration-tests/src/test/java/org/apache/druid/tests/TestNGGroup.java)
mvn verify -P int-tests-config-file -Dgroups=<test_group>
To run only a single test using mvn run the following command:
mvn verify -P int-tests-config-file -Dit.test=<test_name>
The integration test that indexes from Cloud or uses Cloud as deep storage is not run as part of the integration test run discussed above. Running these tests requires the user to provide their own Cloud.
Currently, the integration test supports Google Cloud Storage, Amazon S3, and Microsoft Azure. These can be run by providing “gcs-deep-storage”, “s3-deep-storage”, or “azure-deep-storage” to -Dgroups for Google Cloud Storage, Amazon S3, and Microsoft Azure respectively. Note that only one group should be run per mvn command.
In addition to specifying the -Dgroups to mvn command, the following will need to be provided:
For running Google Cloud Storage, in addition to the above, you will also have to:
For example, to run integration test for Google Cloud Storage:
mvn verify -P integration-tests -Dgroups=gcs-deep-storage -Doverride.config.path=<PATH_TO_FILE> -Dresource.file.dir.path=<PATH_TO_FOLDER> -Ddruid.test.config.cloudBucket=test-bucket -Ddruid.test.config.cloudPath=test-data-folder/
The integration test that indexes from hadoop is not run as part of the integration test run discussed above. This is because druid test clusters might not, in general, have access to hadoop. This also applies to integration test that uses Hadoop HDFS as an inputSource or as a deep storage. To run integration test that uses Hadoop, you will have to run a Hadoop cluster. This can be done in two ways:
Currently, hdfs-deep-storage and other -deep-storage integration test groups can only be run with Druid Docker test clusters by passing -Dstart.hadoop.docker=true to start Hadoop container. You will also have to provide -Doverride.config.path=<PATH_TO_FILE> with your Druid‘s Hadoop configs set. See integration-tests/docker/environment-configs/override-examples/hdfs directory for example. Note that if the integration test you are running also uses other cloud extension (S3, Azure, GCS), additional credentials/configs may need to be set in the same file as your Druid’s Hadoop configs set.
Currently, ITHadoopIndexTest can only be run with your own Druid + Haddop cluster by following the below steps: Create a directory called batchHadoop1 in the hadoop file system (anywhere you want) and put batch_hadoop.data (integration-tests/src/test/resources/hadoop/batch_hadoop.data) into that directory (as its only file).
Add this keyword to the configuration file (see above):
"hadoopTestDir": "<name_of_dir_containing_batchHadoop1>"
Run the test using mvn:
mvn verify -P int-tests-config-file -Dit.test=ITHadoopIndexTest
In some test environments, the machine where the tests need to be executed cannot access the outside internet, so mvn cannot be run. In that case, do the following instead of running the tests using mvn:
On a machine that can do mvn builds:
cd druid mvn clean package cd integration_tests mvn dependency:copy-dependencies package
Copy the integration-tests directory to the test cluster.
TDIR=<directory containing integration-tests>/target VER=<version of druid you built> export CLASSPATH=$TDIR/dependency/*:$TDIR/druid-integration-tests-$VER.jar:$TDIR/druid-integration-tests-$VER-tests.jar
java -Duser.timezone=UTC -Dfile.encoding=UTF-8 -Ddruid.test.config.type=configFile -Ddruid.test.config.configFile=<pathname of configuration file> org.testng.TestNG -testrunfactory org.testng.DruidTestRunnerFactory -testclass org.apache.druid.tests.hadoop.ITHadoopIndexTest
For every end-user functionality provided by druid we should have an integration-test verifying the correctness.
A test can access different helper and utility classes provided by test-framework in order to access Coordinator,Broker etc.. To mark a test be able to use Guice Dependency Injection - Annotate the test class with the below annotation
@Guice(moduleFactory = DruidTestModuleFactory.class)
This will tell the test framework that the test class needs to be constructed using guice.
Refer ITIndexerTest as an example on how to use dependency Injection