Improve MetricsAsserts to give more understandable output on failure
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Key: HADOOP-7627
URL: https://issues.apache.org/jira/browse/HADOOP-7627
Project: Hadoop Common
Issue Type: Improvement
Components: metrics, test
Affects Versions: 0.23.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Minor
In developing a test case that uses MetricsAsserts, I had two issues:
1) the error output in the case that an assertion failed does not currently
give any information as to the _actual_ value of the metric
2) there is no way to retrieve the metric variable (eg to assert that the sum
of a metric over all DNs is equal to some value)
This JIRA is to improve this test class to fix the above issues.
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