CLONE -Add unit tests framework (Mockito)
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Key: HDFS-820
URL: https://issues.apache.org/jira/browse/HDFS-820
Project: Hadoop HDFS
Issue Type: Test
Components: build
Affects Versions: 0.21.0, 0.22.0
Reporter: Konstantin Boudnik
Assignee: Konstantin Boudnik
Fix For: 0.21.0, 0.22.0
Most HDFS tests are functional tests that test a feature end to end by running
a mini cluster. We should add more tests like TestReplication that attempt to
stress individual classes in isolation, ie by stubbing out dependencies without
running a mini cluster. This allows for more fine-grain testing and making
tests run much more quickly because they avoid the cost of cluster setup and
teardown. If it makes sense to use another framework besides junit we should
standardize with MAPREDUCE-1050.
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