2016/04/30 - Apache MRUnit has been retired.

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Apache MRUnit TM

Apache MRUnit ™ is a Java library that helps developers unit test Apache Hadoop map reduce jobs.

June 6 2014 - Apache MRUnit 1.1.0 is released¶

Major changes include:

• Update versions of Hadoop we compile against
• Throw assertion error if drivers are reused
• Key object re-use in Reducer is inconsistent with MapReduce behaviour (new API)

More information is available on JIRA

Apr 15 2013 - Apache MRUnit 1.0.0 is released¶

Major changes include:

• Multiple input key-value pairs now supported
• DistributedCache testing support
• Use of real OutputFormats now allowed

More information is available on JIRA

May 16 2012 - Apache MRUnit is now a TLP¶

MRUnit graduates from the Incubator to become a TLP

More information is available on the blog

May 1 2012 - Apache MRUnit 0.9.0-incubating is released¶

Major changes include:

• Driver.runTest throws RuntimeException should it throw AssertionError
• runTest() should optionally ignore output order
• Support custom counter checking

More information is available on the blog and JIRA

March 11 2012 - Apache MRUnit 0.8.1-incubating is released¶

Major changes include:

• Support for Hadoop 0.23

More information is available on the blog and JIRA

February 2 2012 - Apache MRUnit 0.8.0-incubating is released¶

Major changes include:

• Static factory convenience methods
• Meaningful error messages in exception
• Support JobConfigurable and Closable interfaces
• Reducer reuse of pointers over iterator

More information is available on JIRA