Extend the example to show how to run a userspace executable.

Signed-off-by: Thomas Weißschuh <[email protected]>
---
 lib/kunit/Makefile             |  9 ++++++++-
 lib/kunit/kunit-example-test.c | 15 +++++++++++++++
 lib/kunit/kunit-example-uapi.c | 22 ++++++++++++++++++++++
 3 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile
index 
dafa09bd4241c24d31c4c19edecb67bf724127d7..e406a31df1df834a87961663de0b7921b59481c2
 100644
--- a/lib/kunit/Makefile
+++ b/lib/kunit/Makefile
@@ -30,4 +30,11 @@ obj-$(CONFIG_KUNIT_TEST) +=          string-stream-test.o
 obj-$(CONFIG_KUNIT_TEST) +=            assert_test.o
 endif
 
-obj-$(CONFIG_KUNIT_EXAMPLE_TEST) +=    kunit-example-test.o
+userprogs +=                           kunit-example-uapi
+kunit-example-uapi-userccflags :=      -static
+kunit-example-uapi-nolibc :=           $(CONFIG_ARCH_HAS_NOLIBC)
+blobs +=                               kunit-example-uapi.blob.o
+
+obj-$(CONFIG_KUNIT_EXAMPLE_TEST) +=    kunit-example-mod.o
+kunit-example-mod-y +=                 kunit-example-test.o
+kunit-example-mod-$(CONFIG_KUNIT_UAPI) += kunit-example-uapi.blob.o
diff --git a/lib/kunit/kunit-example-test.c b/lib/kunit/kunit-example-test.c
index 
3056d6bc705d0a8f196f0f4412e679dbb0e03114..b2681a6e047dfd6fea4a7cca60e81651d09c2eae
 100644
--- a/lib/kunit/kunit-example-test.c
+++ b/lib/kunit/kunit-example-test.c
@@ -6,8 +6,11 @@
  * Author: Brendan Higgins <[email protected]>
  */
 
+#include <linux/blob.h>
+
 #include <kunit/test.h>
 #include <kunit/static_stub.h>
+#include <kunit/uapi.h>
 
 /*
  * This is the most fundamental element of KUnit, the test case. A test case
@@ -277,6 +280,17 @@ static void example_slow_test(struct kunit *test)
        KUNIT_EXPECT_EQ(test, 1 + 1, 2);
 }
 
+/*
+ * This test shows the usage of UAPI tests.
+ */
+static void example_uapi_test(struct kunit *test)
+{
+       if (IS_ENABLED(CONFIG_KUNIT_UAPI))
+               kunit_uapi_run_kselftest(test, BLOB(kunit_example_uapi));
+       else
+               kunit_skip(test, "CONFIG_KUNIT_UAPI is not enabled");
+}
+
 /*
  * Here we make a list of all the test cases we want to add to the test suite
  * below.
@@ -297,6 +311,7 @@ static struct kunit_case example_test_cases[] = {
        KUNIT_CASE(example_priv_test),
        KUNIT_CASE_PARAM(example_params_test, example_gen_params),
        KUNIT_CASE_SLOW(example_slow_test),
+       KUNIT_CASE(example_uapi_test),
        {}
 };
 
diff --git a/lib/kunit/kunit-example-uapi.c b/lib/kunit/kunit-example-uapi.c
new file mode 100644
index 
0000000000000000000000000000000000000000..4ce657050dd4a576632a41ca0309c4cb5134ce14
--- /dev/null
+++ b/lib/kunit/kunit-example-uapi.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * KUnit Userspace example test.
+ *
+ * Copyright (C) 2025, Linutronix GmbH.
+ * Author: Thomas Weißschuh <[email protected]>
+ *
+ * This is *userspace* code.
+ */
+
+#include "../../tools/testing/selftests/kselftest.h"
+
+int main(void)
+{
+       ksft_print_header();
+       ksft_set_plan(4);
+       ksft_test_result_pass("userspace test 1\n");
+       ksft_test_result_pass("userspace test 2\n");
+       ksft_test_result_skip("userspace test 3: some reason\n");
+       ksft_test_result_pass("userspace test 4\n");
+       ksft_finished();
+}

-- 
2.49.0


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