Windows driver testing in Linux, and Windows regardless of driver type require certain tests. Let us have a look at some common aspects before jumping into the nuances of testing different types of drivers.
It is important to note that a driver can behave differently on different operating systems. Additionally, different kernel versions need to be taken into account because they can differ even within the same operating system. For example, Windows 7 and Windows 7 sp1 have different kernels. Test as many systems as possible is highly recommended.
It’s necessary to check critical situations for a driver such as shutdown, reboot, and reset. It is also well worth to keep a system’s security systems in mind: firewalls, data execution prevention (DEP), user account control (UAC), and antivirus software. Operating system updates can also influence driver functionality. Therefore, it’s crucial to perform testing with the latest updates. Additionally, testing driver updates is a must.
Apart from software dependency, there’s also hardware dependency. That’s why you have to check how a driver works with various processor and kernel configurations with an enabled and disabled page file. While testing a driver, a driver verifier has to be enabled, which will create an additional load for the driver. Check the correctness of driver installation and uninstallation, system reset, and hibernation during the testing process
When should you start testing? As soon as the requirements for your driver can be accessed, test cases can be designed to test that the critical requirements have been implemented. Studies have shown that the longer the defects remain in the code, finding and fixing defects becomes more expensive. To detect problems in the design creating test cases early definitely helps. It proves to be less costly and disruptive when finding and fixing defects early in the development cycle rather than finding defects after the release and distribution of the code.
Testing the driver and device on as many hardware configurations as possible. Varying the hardware can help find conflicts between devices and other errors in device interactions. For instance, testing a driver and device on computers that have different processor architectures.
eTech Prowess located in J.P Nagar, Bangalore, offers an intensive 16-week program in Windows device driver, preparing its students to master relevant high-demand skills in Windows device driver.
Advanced Embedded Systems training in Bangalore | eTech prowess