WordCount unit test plus a helper class to facilitate testing Mappers and
Reducers
----------------------------------------------------------------------------------
Key: HADOOP-1936
URL: https://issues.apache.org/jira/browse/HADOOP-1936
Project: Hadoop
Issue Type: Test
Components: examples
Reporter: Kate Rhodes
Priority: Trivial
There are to pieces to this The first is a test for WordCount, not because word
count actually needed one but because it would be useful to beginners to have
an example of how to unit test Mappers and Reducers.
The second piece is AOutputCollector and it's associated unit test
TestAOutputCollector. This is an abstract class that can be quickly extended by
a stub OutputCollector in your unit tests to collect the output from your
Mapper and Reducer tests and make it available for easy retreival when testing
to see if the fourth key that was emitted was the one you expected. I think
that this would be a useful tool to have in the main test folder but wasn't
sure where would be best to put it. Also, since nothing else in Hadoop uses
Hungarian notation you'll probably want to rename it. I didn't because I'm not
confident about the naming conventions here and figured that since it and its
test probably wouldn't end up living in the same folder as WordCount that you
could just rename it when you moved it.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
