**Arrange:** - Configuring the environment (with for example Gradle v3.3). - Importing the junit .jar files, so we can run junit test cases. **Act:** - Creating a TestFile where we want to run the test case. - Making an instance of ResourceManager Class - Check if the instance is created of not with assertNull. **Excepting:** - We can make an instance of the ResourceManager class and run different test cases on it to check, if it's working properly or not. **Actually:** - During the test, we got a NullPointerException. 