On Thu, May 2, 2019 at 8:02 AM Brendan Higgins <brendanhiggins@xxxxxxxxxx> wrote: > > ## TLDR > > I rebased the last patchset on 5.1-rc7 in hopes that we can get this in > 5.2. > > Shuah, I think you, Greg KH, and myself talked off thread, and we agreed > we would merge through your tree when the time came? Am I remembering > correctly? > > ## Background > > This patch set proposes KUnit, a lightweight unit testing and mocking > framework for the Linux kernel. > > Unlike Autotest and kselftest, KUnit is a true unit testing framework; > it does not require installing the kernel on a test machine or in a VM > and does not require tests to be written in userspace running on a host > kernel. Additionally, KUnit is fast: From invocation to completion KUnit > can run several dozen tests in under a second. Currently, the entire > KUnit test suite for KUnit runs in under a second from the initial > invocation (build time excluded). > > KUnit is heavily inspired by JUnit, Python's unittest.mock, and > Googletest/Googlemock for C++. KUnit provides facilities for defining > unit test cases, grouping related test cases into test suites, providing > common infrastructure for running tests, mocking, spying, and much more. > > ## What's so special about unit testing? > > A unit test is supposed to test a single unit of code in isolation, > hence the name. There should be no dependencies outside the control of > the test; this means no external dependencies, which makes tests orders > of magnitudes faster. Likewise, since there are no external dependencies, > there are no hoops to jump through to run the tests. Additionally, this > makes unit tests deterministic: a failing unit test always indicates a > problem. Finally, because unit tests necessarily have finer granularity, > they are able to test all code paths easily solving the classic problem > of difficulty in exercising error handling code. > > ## Is KUnit trying to replace other testing frameworks for the kernel? > > No. Most existing tests for the Linux kernel are end-to-end tests, which > have their place. A well tested system has lots of unit tests, a > reasonable number of integration tests, and some end-to-end tests. KUnit > is just trying to address the unit test space which is currently not > being addressed. > > ## More information on KUnit > > There is a bunch of documentation near the end of this patch set that > describes how to use KUnit and best practices for writing unit tests. > For convenience I am hosting the compiled docs here: > https://google.github.io/kunit-docs/third_party/kernel/docs/ > Additionally for convenience, I have applied these patches to a branch: > https://kunit.googlesource.com/linux/+/kunit/rfc/v5.1-rc7/v1 > The repo may be cloned with: > git clone https://kunit.googlesource.com/linux > This patchset is on the kunit/rfc/v5.1-rc7/v1 branch. > > ## Changes Since Last Version > > None. I just rebased the last patchset on v5.1-rc7. > > -- > 2.21.0.593.g511ec345e18-goog > The following is the log of 'git am' of this series. I see several 'new blank line at EOF' warnings. masahiro@pug:~/workspace/bsp/linux$ git am ~/Downloads/*.patch Applying: kunit: test: add KUnit test runner core Applying: kunit: test: add test resource management API Applying: kunit: test: add string_stream a std::stream like string builder .git/rebase-apply/patch:223: new blank line at EOF. + warning: 1 line adds whitespace errors. Applying: kunit: test: add kunit_stream a std::stream like logger Applying: kunit: test: add the concept of expectations .git/rebase-apply/patch:475: new blank line at EOF. + warning: 1 line adds whitespace errors. Applying: kbuild: enable building KUnit Applying: kunit: test: add initial tests .git/rebase-apply/patch:203: new blank line at EOF. + warning: 1 line adds whitespace errors. Applying: kunit: test: add support for test abort .git/rebase-apply/patch:453: new blank line at EOF. + warning: 1 line adds whitespace errors. Applying: kunit: test: add tests for kunit test abort Applying: kunit: test: add the concept of assertions .git/rebase-apply/patch:518: new blank line at EOF. + warning: 1 line adds whitespace errors. Applying: kunit: test: add test managed resource tests Applying: kunit: tool: add Python wrappers for running KUnit tests .git/rebase-apply/patch:457: new blank line at EOF. + warning: 1 line adds whitespace errors. Applying: kunit: defconfig: add defconfigs for building KUnit tests Applying: Documentation: kunit: add documentation for KUnit .git/rebase-apply/patch:71: new blank line at EOF. + .git/rebase-apply/patch:209: new blank line at EOF. + .git/rebase-apply/patch:848: new blank line at EOF. + warning: 3 lines add whitespace errors. Applying: MAINTAINERS: add entry for KUnit the unit testing framework Applying: kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec() Applying: MAINTAINERS: add proc sysctl KUnit test to PROC SYSCTL section -- Best Regards Masahiro Yamada
