From patchwork Wed Aug 21 14:43:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Wajdeczko X-Patchwork-Id: 13771700 X-Patchwork-Delegate: brendanhiggins@google.com Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5A90E1B250D for ; Wed, 21 Aug 2024 14:43:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.16 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724251411; cv=none; b=QrwK5U6usshtL20WmLSw+l916jCE662hyo+HA3HMouk9HlCCMP6wjumlttrHHrB31sLP4aSq/at+EZ1mdL8Hhmxc+rN8TheuMwlhcy7tvgJtQAYLXsYe9jmVwXLA9iRRRbBUpVxHbZDfhbKnxuOmGd9mGq7M4ZA4KXZqPvagEEw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724251411; c=relaxed/simple; bh=BSD73sM2L6z9u+zRHPMws6dQC0WsD14nix7MPD6WDSs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=eGqntBOlkkqB4b3FIERtKGv2Ur4qnGPX6WdAqXWjboaFu/urT844fMlJAkQ2FsTwmDYutQOTfJaA8TUFarjiS5r1a/sIFTSZfvk2YJN/dBf+1yDqCPnww7NfRFNph/cZlZ7UAuOsgjPLAMHOyu6IvW8q+J/uHbV+whXX2IID8ds= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Ji/oo6lh; arc=none smtp.client-ip=198.175.65.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Ji/oo6lh" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1724251410; x=1755787410; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=BSD73sM2L6z9u+zRHPMws6dQC0WsD14nix7MPD6WDSs=; b=Ji/oo6lhb3l86Ujev7gU5JE2r+NNgTacurOqrgKferulj+NV1HB4f9fY EH8JMgdP0ePwb6WtBUDaeXwqhKhbvXgjWvQe+BPLi6bb2/43GgrfRPbnK O862JwvRvHitYwy+ot1ODMXPdJ1KUrkTE/9H30MeUXgognLpKDZy0SGs5 a+Lbk8xpKHif+7vbyAD1ZlpR79r0DE7uimgJdTMKjM2+IeuZlJ4WpNiWK dna8meVA1oFgaPxgRlolG37covmRghY39j0zdVIDwJ83wkazZQOBBIGGd eyQXtigtgGvCsZVAjvYXAUntqEAVniAYpkevS/J6bTHUqm74Xx7uXZyhR w==; X-CSE-ConnectionGUID: /VjX3t2iRkSc/FbtqK0hsg== X-CSE-MsgGUID: zDf/FF63Rk+LRtyPkuViYA== X-IronPort-AV: E=McAfee;i="6700,10204,11171"; a="22750560" X-IronPort-AV: E=Sophos;i="6.10,164,1719903600"; d="scan'208";a="22750560" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Aug 2024 07:43:29 -0700 X-CSE-ConnectionGUID: xyJBUGMJSj6ukId+akVnDQ== X-CSE-MsgGUID: qiRKFl01TE+fQcSz/bl/sg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,164,1719903600"; d="scan'208";a="65316542" Received: from mwajdecz-mobl.ger.corp.intel.com ([10.246.19.248]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Aug 2024 07:43:27 -0700 From: Michal Wajdeczko To: linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com Cc: Michal Wajdeczko , David Gow , Daniel Latypov , Lucas De Marchi Subject: [PATCH 4/4] kunit: Add example with alternate function redirection method Date: Wed, 21 Aug 2024 16:43:05 +0200 Message-Id: <20240821144305.1958-5-michal.wajdeczko@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20240821144305.1958-1-michal.wajdeczko@intel.com> References: <20240821144305.1958-1-michal.wajdeczko@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add example how to use KUNIT_FIXED_STUB_REDIRECT and compare its usage with the KUNIT_STATIC_STUB_REDIRECT. Also show how the DECLARE_IF_KUNIT macro could be helpful in declaring test data in the non-test data structures. Signed-off-by: Michal Wajdeczko Reviewed-by: Rae Moar Reviewed-by: David Gow --- Cc: David Gow Cc: Daniel Latypov Cc: Lucas De Marchi --- lib/kunit/kunit-example-test.c | 63 ++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) diff --git a/lib/kunit/kunit-example-test.c b/lib/kunit/kunit-example-test.c index 3056d6bc705d..120e08d8899b 100644 --- a/lib/kunit/kunit-example-test.c +++ b/lib/kunit/kunit-example-test.c @@ -6,8 +6,10 @@ * Author: Brendan Higgins */ +#include #include #include +#include /* * This is the most fundamental element of KUnit, the test case. A test case @@ -221,6 +223,66 @@ static void example_static_stub_using_fn_ptr_test(struct kunit *test) KUNIT_EXPECT_EQ(test, add_one(1), 2); } +/* This could be a location of various fixed stub functions. */ +static struct { + DECLARE_IF_KUNIT(int (*add_two)(int i)); +} stubs; + +/* This is a function we'll replace with stubs. */ +static int add_two(int i) +{ + /* This will trigger the stub if active. */ + KUNIT_STATIC_STUB_REDIRECT(add_two, i); + KUNIT_FIXED_STUB_REDIRECT(stubs.add_two, i); + + return i + 2; +} + +struct add_two_async_work { + struct work_struct work; + int param; + int result; +}; + +static void add_two_async_func(struct work_struct *work) +{ + struct add_two_async_work *w = container_of(work, typeof(*w), work); + + w->result = add_two(w->param); +} + +static int add_two_async(int i) +{ + struct add_two_async_work w = { .param = i }; + + INIT_WORK_ONSTACK(&w.work, add_two_async_func); + schedule_work(&w.work); + flush_work(&w.work); + destroy_work_on_stack(&w.work); + + return w.result; +} + +/* + */ +static void example_fixed_stub_test(struct kunit *test) +{ + /* static stub redirection works only for KUnit thread */ + kunit_activate_static_stub(test, add_two, subtract_one); + KUNIT_EXPECT_EQ(test, add_two(1), subtract_one(1)); + KUNIT_EXPECT_NE_MSG(test, add_two_async(1), subtract_one(1), + "stub shouldn't be active outside KUnit thread!"); + kunit_deactivate_static_stub(test, add_two); + KUNIT_EXPECT_EQ(test, add_two(1), add_two(1)); + + /* fixed stub redirection works for KUnit and other threads */ + kunit_activate_fixed_stub(test, stubs.add_two, subtract_one); + KUNIT_EXPECT_EQ(test, add_two(1), subtract_one(1)); + KUNIT_EXPECT_EQ(test, add_two_async(1), subtract_one(1)); + kunit_deactivate_fixed_stub(test, stubs.add_two); + KUNIT_EXPECT_EQ(test, add_two(1), add_two(1)); +} + static const struct example_param { int value; } example_params_array[] = { @@ -294,6 +356,7 @@ static struct kunit_case example_test_cases[] = { KUNIT_CASE(example_all_expect_macros_test), KUNIT_CASE(example_static_stub_test), KUNIT_CASE(example_static_stub_using_fn_ptr_test), + KUNIT_CASE(example_fixed_stub_test), KUNIT_CASE(example_priv_test), KUNIT_CASE_PARAM(example_params_test, example_gen_params), KUNIT_CASE_SLOW(example_slow_test),