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[[Testing Framework Cheatsheet]] = Testing

Creating packages

To create a distribution without running the tests, simply run the following:

mvn clean package -DskipTests

Other test options

To disable and enable network transport, set the Des.node.mode.

Use network transport (default):

-Des.node.mode=network

Use local transport:

-Des.node.mode=local

Alternatively, you can set the ES_TEST_LOCAL environment variable:

export ES_TEST_LOCAL=true && mvn test

Test case filtering.

  • tests.class is a class-filtering shell-like glob pattern,

  • tests.method is a method-filtering glob pattern.

Run a single test case (variants)

mvn test -Dtests.class=org.elasticsearch.package.ClassName
mvn test "-Dtests.class=*.ClassName"

Run all tests in a package and sub-packages

mvn test "-Dtests.class=org.elasticsearch.package.*"

Run any test methods that contain 'esi' (like: …​r*esi*ze…​).

mvn test "-Dtests.method=*esi*"

Seed and repetitions.

Run with a given seed (seed is a hex-encoded long).

mvn test -Dtests.seed=DEADBEEF

Repeats all tests of ClassName N times.

Every test repetition will have a different method seed (derived from a single random master seed).

mvn test -Dtests.iters=N -Dtests.class=*.ClassName

Repeats all tests of ClassName N times.

Every test repetition will have exactly the same master (0xdead) and method-level (0xbeef) seed.

mvn test -Dtests.iters=N -Dtests.class=*.ClassName -Dtests.seed=DEAD:BEEF

Repeats a given test N times

(note the filters - individual test repetitions are given suffixes, ie: testFoo[0], testFoo[1], etc…​ so using testmethod or tests.method ending in a glob is necessary to ensure iterations are run).

mvn test -Dtests.iters=N -Dtests.class=*.ClassName -Dtests.method=mytest*

Repeats N times but skips any tests after the first failure or M initial failures.

mvn test -Dtests.iters=N -Dtests.failfast=true -Dtestcase=...
mvn test -Dtests.iters=N -Dtests.maxfailures=M -Dtestcase=...

Test groups.

Test groups can be enabled or disabled (true/false).

Default value provided below in [brackets].

mvn test -Dtests.nightly=[false]   - nightly test group (@Nightly)
mvn test -Dtests.weekly=[false]    - weekly tests (@Weekly)
mvn test -Dtests.awaitsfix=[false] - known issue (@AwaitsFix)
mvn test -Dtests.slow=[true]       - slow tests (@Slow)

Load balancing and caches.

By default, the tests run sequentially on a single forked JVM.

To run with more forked JVMs than the default use:

mvn test -Dtests.jvms=8 test

Don’t count hypercores for CPU-intense tests and leave some slack for JVM-internal threads (like the garbage collector). Make sure there is enough RAM to handle child JVMs.

Miscellaneous.

Run all tests without stopping on errors (inspect log files).

mvn test -Dtests.haltonfailure=false test

Run more verbose output (slave JVM parameters, etc.).

mvn test -verbose test

Change the default suite timeout to 5 seconds for all tests (note the exclamation mark).

mvn test -Dtests.timeoutSuite=5000! ...

Change the logging level of ES (not mvn)

mvn test -Des.logger.level=DEBUG

Print all the logging output from the test runs to the commandline even if tests are passing.

mvn test -Dtests.output=always

Testing the REST layer

The available integration tests make use of the java API to communicate with the elasticsearch nodes, using the internal binary transport (port 9300 by default). The REST layer is tested through specific tests that are shared between all the elasticsearch official clients and consist of YAML files that describe the operations to be executed and the obtained results that need to be tested.

The REST tests are run automatically when executing the maven test command. To run only the REST tests use the following command:

mvn test -Dtests.class=org.elasticsearch.test.rest.ElasticsearchRestTests

ElasticsearchRestTests is the executable test class that runs all the yaml suites available within the rest-api-spec folder.

The REST tests support all the options provided by the randomized runner, plus the following:

  • tests.rest[true|false]: determines whether the REST tests need to be run (default) or not.

  • tests.rest.suite: comma separated paths of the test suites to be run (by default loaded from /rest-api-spec/test). It is possible to run only a subset of the tests providing a sub-folder or even a single yaml file (the default /rest-api-spec/test prefix is optional when files are loaded from classpath) e.g. -Dtests.rest.suite=index,get,create/10_with_id

  • tests.rest.spec: REST spec path (default /rest-api-spec/api)

Note that the REST tests, like all the integration tests, can be run against an external cluster by specifying the tests.cluster property, which if present needs to contain a comma separated list of nodes to connect to (e.g. localhost:9300). A transport client will be created based on that and used for all the before|after test operations, and to extract the http addresses of the nodes so that REST requests can be sent to them.