Jens Rabe created HADOOP-11849:
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Summary: There should be a JUnit test runner which automatically
initializes the mini cluster
Key: HADOOP-11849
URL: https://issues.apache.org/jira/browse/HADOOP-11849
Project: Hadoop Common
Issue Type: Improvement
Components: test
Reporter: Jens Rabe
Priority: Minor
Setting up the mini cluster is not a big deal, but when writing a larger amount
of integration tests, one quickly has a lot of code duplication. Creating
abstract test classes which set up the cluster is a feasible solution, but then
there is the problem with the order of *BeforeClass*, especially when a lengthy
MR job is to be run exactly once and several tests then check the output data.
It would be nice if the following were possible:
{code:java}
@RunWith(MiniCluster.class)
public class SomeLengthyIntegrationTest {
@Conf
private static Configuration _conf;
@FS
private static FileSystem _fs;
@BeforeClass
public static void runMRJob() throws Exception {
final Job job = Job.getInstance(_conf);
// ... set up the job
assertTrue("Job was successful", job.waitForCompletion(true));
}
@Test
public void testSomething() {
// a test
}
// more tests
}
Maybe there could be more annotation-driven configuration options. A nice
example for such an approach is the *SpringJUnit4ClassRunner* from the Spring
framework.
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