Module 2 query JUnits

where to find the Junits test

can anyone specify the directory structure

Inside qmoney/src, you will find a folder named test. The test folder has all the JUnit tests besides the hidden ones that are run when you push your code.

is Junit tests a file or what

JUnit tests are Java unit tests.
These tests are written inside java classes.

you can read about JUnit testing here : JUnit Tutorial

You should be looking at and it contain tests for that something