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Unit Testing in the Linux Kernel

Submitted by Rianne Schestowitz on Thursday 3rd of January 2019 03:35:12 PM Filed under
Linux

Brendan Higgins recently proposed adding unit tests to the Linux kernel, supplementing other development infrastructure such as perf, autotest and kselftest. The whole issue of testing is very dear to kernel developers' hearts, because Linux sits at the core of the system and often has a very strong stability/security requirement. Hosts of automated tests regularly churn through kernel source code, reporting any oddities to the mailing list.

Unit tests, Brendan said, specialize in testing standalone code snippets. It was not necessary to run a whole kernel, or even to compile the kernel source tree, in order to perform unit tests. The code to be tested could be completely extracted from the tree and tested independently. Among other benefits, this meant that dozens of unit tests could be performed in less than a second, he explained.

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