[[Testing Framework Cheatsheet]]
= Testing

[partintro]
--
Elasticsearch uses jUnit for testing, it also uses randomness in the
tests, that can be set using a seed, the following is a cheatsheet of
options for running the tests for ES.

== Creating packages

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

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mvn clean package -DskipTests
-----------------------------

== Other test options

To disable and enable netty transport, set the `ES_TEST_LOCAL`
environment variable.

Use netty transport:

------------------------------------
export ES_TEST_LOCAL=true && mvn test
------------------------------------

Use local transport:

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export ES_TEST_LOCAL=false && mvn test
-------------------------------------

Wait on mapping changes:

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export ES_WAIT_ON_MAPPING_CHANGE=true && mvn test
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=== 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)

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

Run all tests in a package and sub-packages

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

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

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mvn test "-Dtests.method=*esi*"
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=== Seed and repetitions.

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

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mvn test -Dtests.seed=DEADBEEF
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=== Repeats _all_ tests of ClassName N times.

Every test repetition will have a different seed.

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

=== Repeats _all_ tests of ClassName N times.

Every test repetition will have exactly the same master (dead) and
method-level (beef) seed.

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

=== 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.

Run sequentially (one slave JVM). By default, the tests run with 3
concurrent JVMs.

----------------------------
mvn test -Dtests.jvms=1 test
----------------------------

Run with more slave JVMs than the default. Don't count hypercores for
CPU-intense tests. Make sure there is enough RAM to handle child JVMs.

----------------------------
mvn test -Dtests.jvms=8 test
----------------------------

=== 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.).

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mvn test -verbose test
----------------------

Change the default suite timeout to 5 seconds.

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mvn test -Dtests.timeoutSuite=5000! ...
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Change the logging level of ES (not mvn)

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mvn test -Des.logger.level=DEBUG
--------------------------------

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

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mvn test -Dtests.output=always
------------------------------