BIg data testing approch

i am working on big data project. The basic flow of the project is following:data is coming from mainframe and getting stored into cornerstone 3.0.After that the data is getting ingested in hive using scheduler and then it is getting stored into the mapr db using map reduce job(running hive queries to get specific aggregated attributes) in terms of the key-value pair to reflect into the application using Rest API. I want to test this application starting from Hive to Rest API assuming the data in Hive is loaded correctly. What can be the best approach to test this application (Objective to be tested : Hive data,hive queries,mapr db performance,mapr dp data,Rest api).What are the best tools and technology to use. Thank you in advance.