A picture's worth a 1000 tests.
Unit testing asserts can be difficult to use. Approval tests simplify this by taking a snapshot of the results, and confirming that they have not changed.
Cascading is an application framework for Java developers to quickly and easily develop robust Data Analytics and Data Management applications on Apache Hadoop
The purpose of the project is to ease the development of stack validation functionality and hide certain aspects of stack from development and quality engineers alike and let them to focus on what they do best: developing and testing a software.