[PATCH] selftests: Add information about TAP conformance in tests

[Muhammad Usama Anjum <usama.anjum@collabora.com>]

Although "TAP" word is being used already in documentation, but it hasn't
been defined in informative way for developers that how to write TAP
conformant tests and what are the benefits. Write a short brief about it.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
---
 Documentation/dev-tools/kselftest.rst | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/dev-tools/kselftest.rst b/Documentation/dev-tools/kselftest.rst
index dcf634e411bd9..b579f491f3e97 100644
--- a/Documentation/dev-tools/kselftest.rst
+++ b/Documentation/dev-tools/kselftest.rst
@@ -228,6 +228,14 @@ In general, the rules for selftests are
  * Don't cause the top-level "make run_tests" to fail if your feature is
    unconfigured.
 
+ * The output of tests must conform to the TAP standard to ensure high
+   testing quality and to capture failures/errors with specific details.
+   The kselftest.h and kselftest_harness.h headers provide wrappers for
+   outputting test results such as pass, fail, or skip etc. These wrappers
+   should be used instead of reinventing the wheel or using raw printf and
+   exit statements. CI systems can easily parse TAP output messages to
+   detect test failures.
+
 Contributing new tests (details)
 ================================
 
-- 
2.39.2