[PATCH 2/2] kunit: Add example of test suite that can be skipped at runtime

Add an example test suite name 'example_test_skip_suite' to
'kunit-example-test.c' that shows how to skip an entire test suite based on
runtime conditions.

The example suite 'example_skip_suite' provides a 'suite_init' callback
named example_skip_suite_init() which marks the entire suite as skipped
using kunit_mark_skipped().

This demonstrates a way for conditionally skipping test suites when any
prerequisites for kunit_suite execution are not met. The 'suite_init'
callback can perform any necessary checks and mark the suite as skipped,
preventing all test cases from executing while also indicating why the
suite was skipped.

Signed-off-by: Vaibhav Jain <[email protected]>
---
 lib/kunit/kunit-example-test.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/lib/kunit/kunit-example-test.c b/lib/kunit/kunit-example-test.c
index 0bae7b7ca0b0..b8ded54fa46d 100644
--- a/lib/kunit/kunit-example-test.c
+++ b/lib/kunit/kunit-example-test.c
@@ -591,5 +591,34 @@ static struct kunit_suite example_init_test_suite = {
  */
 kunit_test_init_section_suites(&example_init_test_suite);
 
+/*
+ * This test should always be skipped.
+ */
+static void example_skip_suite_test(struct kunit *test)
+{
+	/* This line should never be seen */
+	KUNIT_FAIL(test, "You should not see a this.");
+}
+
+static struct kunit_case  example_skip_suite_test_cases[] = {
+	KUNIT_CASE(example_skip_suite_test),
+	{}
+};
+
+static int example_skip_suite_init(struct kunit_suite *suite)
+{
+	kunit_mark_skipped(suite, "Test suite expected to be skipped");
+	return 0;
+}
+
+static struct kunit_suite example_test_skip_suite = {
+	.name = "example_skip_suite",
+	.suite_init = example_skip_suite_init,
+	.test_cases = example_skip_suite_test_cases,
+};
+
+/* This registers a test suite that will be skipped */
+kunit_test_suite(example_test_skip_suite);
+
 MODULE_DESCRIPTION("Example KUnit test suite");
 MODULE_LICENSE("GPL v2");
-- 
2.54.0