Telescopes give us a view of the still unexplored corners of the vast universe around us. In the future, the ELT telescope will play an important
role in the advancement of astronomy, as it is expected to take over the title of the largest optical infrared telescope in the world after its completion.
As part of the diploma thesis, we implemented and presented the procedure
used in testing the control system of the ELT telescope utilizing the RobotFramework and TestNG frameworks. For the needs of testing, we developed
a simulator of a simplified service of the control system of the said telescope.
In the implementation of the simulator, we used the Mockito framework,
which further tested the functionality of this framework, that is otherwise
used in unit testing.