Test list preprocessor support for tests to be run
--------------------------------------------------
Key: SUREFIRE-726
URL: http://jira.codehaus.org/browse/SUREFIRE-726
Project: Maven Surefire
Issue Type: New Feature
Affects Versions: 2.8.2
Reporter: Janmejay Singh
Attachments:
0001-Adds-test-list-preprocessor-support-which-loads-an-o.patch,
0002-Integration-test-for-preprocessor.-2-modules-one-pro.patch
This exposes an interface(named TestListPreprocessor, which has a method named
preprocessTestClasses) that can be implemented by a user and injected into
surefire plugin configuration to have it used for preprocessing list of tests
to be run. Given the original test list, user's preprocessing algorithm can
choose to prune or reorder the list and return it back from
TestListPreprocessor#preprocessTestClasses, which is then used as the list of
tests to be executed.
The patches attached expose a configuration element named "testPreprocessor"
the default value of which is "none". User can choose to set it to a value
matching the format
"<fully-qualified-class-name>[<group-id>:<artifact-id>:<version>]" and have the
class loaded and called with list of tests to be run. The list of tests
returned by the call is then considered for execution.
Patch description:
The feature is done in 2 patches. Description follows:
0001-Adds-test-list-preprocessor-support-which-loads-an-o.patch
This patch actually adds the feature and unit tests. It adds the interface, an
abstraction that encapsulates aforementioned configuration, booter
serialization/deserialization, directory-scanner changes etc. The changes have
effect in both forked and in-process execution mode.
0002-Integration-test-for-preprocessor.-2-modules-one-pro.patch
This patch adds an integration test for preprocessor feature. The integration
test uses a 2 module setup, where the first module implements the
TestListPreprocessor interface which selects only even indexed test classes
from the list passed in. The second module(which depends on first) uses the
artifact from first and uses the following configuration:
--------------------
<configuration>
<testPreprocessor>test.preprocessor.EvenTestOnlyPreprocessor[org.apache.maven.plugins.surefire:preprocessor-impl:1.0-SNAPSHOT]</testPreprocessor>
</configuration>
--------------------
The test then asserts that only 2(0th and 2nd) of the 4 test classes the second
module has are executed.
The patches are created on a git-svn clone using format-patch, please use
'patch -p1 < 0001-Adds...'(while in the trunk directory) to apply the patches
on svn repository. If using git-svn, git-am can be directly be invoked.
The patches are done over
http://svn.apache.org/repos/asf/maven/surefire/trunk@1091357 (trunk HEAD) so
should apply cleanly on any recent enough revision.
===============================================================================
Context:
http://stackoverflow.com/questions/5124823/reducing-the-build-time-hudson
http://code.google.com/p/tlb/issues/detail?id=1
http://test-load-balancer.github.com
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