From patchwork Tue May 14 05:42:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brendan Higgins X-Patchwork-Id: 10942111 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E0C0D1390 for ; Tue, 14 May 2019 05:44:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CF4C2285D6 for ; Tue, 14 May 2019 05:44:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C1EDE285E0; Tue, 14 May 2019 05:44:29 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1B350285D6 for ; Tue, 14 May 2019 05:44:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727033AbfENFo2 (ORCPT ); Tue, 14 May 2019 01:44:28 -0400 Received: from mail-vs1-f74.google.com ([209.85.217.74]:39952 "EHLO mail-vs1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727027AbfENFo2 (ORCPT ); Tue, 14 May 2019 01:44:28 -0400 Received: by mail-vs1-f74.google.com with SMTP id l6so2141921vsl.7 for ; Mon, 13 May 2019 22:44:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=tQwWrcRy808xg0oHXDXcq38sXPWvf/6o77Mrd43/F4Q=; b=otD7gwdS6vK/Yz7TVuI7p+nrDksFPbcpSDSdRjl7VrcE3eM/TAmgFNGWB7LIxq3D+j J5iZdf4e7CS3KAf2tXYOJ83sxfWbkDpR6eE4wcgL+RmgjlerU/cgrMP1nSRv7sFb7WAb 6Z/qJpAgAA4pOGHomZb3vivS3ZuWmEG3XQWFY7BJ5o6J5xqg280rjnV1+3TYTMsS6ibW Szg2L3SNjdepaIsQktGTZ6WFRYW1OFksfblcP75/08l1SxN6hf9foKlMA0MemelUs9C8 j40BnLhVgPoBthPeS4i9iQY18nfXMAmWhfVAV5CMVdNzrMKTK0rmJhxk+5J2pWbNn5FZ vy1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=tQwWrcRy808xg0oHXDXcq38sXPWvf/6o77Mrd43/F4Q=; b=AnrpcvcEhqgf87OUA7ZCaUP11CBMsHUjaQYaiwQCHbGRwv/pRJg2jKJwC+5rLGcF41 vNTQmD7ZG0oK/yNTPqYUOA/bbahu0Wy0ywmbNTB0E7pxf6uj7MYPfdQn+lJ9uNS/+3nE 9tJ4kZbW2kj0AdiR4O7yPx7l6dJGrE9HYnDhTH4qn1peUZyBsUZHzAq+MBO1qi3P3qfv 39s8uKiottmo6yNMXBm9ka6TQXj4s19DuuQ74o8zEPze6WkBP7fN0bJOMjqRUA33zPdx UQDn7b6w7QwdNad/tPKJ1lAkXnSXiLBwOBRwNcYCh8IewyC3Jp+bVV3auqvgrwLz0wY7 KVMQ== X-Gm-Message-State: APjAAAVzUYCE/9tdgab3iHX1C5xb0TvF5rrgZh6fSJ2+F2hw2wQw9/5v nZu3bM0qJ7UoErk1XYhSf/sgUUKsiHE4wnuBox5Fgg== X-Google-Smtp-Source: APXvYqzY1yYhB34ctvdanLANca/+9sYv5O5WXUzG4FBVp2se1F7tz/N2Xf7P7hdklBOlQobGYnyaYa3LVivoXE3o/y0oXA== X-Received: by 2002:a1f:d4f:: with SMTP id 76mr14797865vkn.30.1557812666797; Mon, 13 May 2019 22:44:26 -0700 (PDT) Date: Mon, 13 May 2019 22:42:40 -0700 In-Reply-To: <20190514054251.186196-1-brendanhiggins@google.com> Message-Id: <20190514054251.186196-8-brendanhiggins@google.com> Mime-Version: 1.0 References: <20190514054251.186196-1-brendanhiggins@google.com> X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [PATCH v3 07/18] kunit: test: add initial tests From: Brendan Higgins To: frowand.list@gmail.com, gregkh@linuxfoundation.org, keescook@google.com, kieran.bingham@ideasonboard.com, mcgrof@kernel.org, robh@kernel.org, sboyd@kernel.org, shuah@kernel.org, tytso@mit.edu, yamada.masahiro@socionext.com Cc: devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, linux-um@lists.infradead.org, Alexander.Levin@microsoft.com, Tim.Bird@sony.com, amir73il@gmail.com, dan.carpenter@oracle.com, dan.j.williams@intel.com, daniel@ffwll.ch, jdike@addtoit.com, joel@jms.id.au, julia.lawall@lip6.fr, khilman@baylibre.com, knut.omang@oracle.com, logang@deltatee.com, mpe@ellerman.id.au, pmladek@suse.com, rdunlap@infradead.org, richard@nod.at, rientjes@google.com, rostedt@goodmis.org, wfg@linux.intel.com, Brendan Higgins Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a test for string stream along with a simpler example. Signed-off-by: Brendan Higgins Reviewed-by: Greg Kroah-Hartman Reviewed-by: Logan Gunthorpe --- Changes Since Last Revision: - Added more Kconfig help text for KUNIT_TEST and KUNIT_EXAMPLE_TEST as per Shuah's comments. --- kunit/Kconfig | 25 ++++++++++- kunit/Makefile | 4 ++ kunit/example-test.c | 88 ++++++++++++++++++++++++++++++++++++++ kunit/string-stream-test.c | 60 ++++++++++++++++++++++++++ 4 files changed, 175 insertions(+), 2 deletions(-) create mode 100644 kunit/example-test.c create mode 100644 kunit/string-stream-test.c diff --git a/kunit/Kconfig b/kunit/Kconfig index 64480092b2c24..2052536cf9d3c 100644 --- a/kunit/Kconfig +++ b/kunit/Kconfig @@ -10,7 +10,28 @@ config KUNIT Enables support for kernel unit tests (KUnit), a lightweight unit testing and mocking framework for the Linux kernel. These tests are able to be run locally on a developer's workstation without a VM or - special hardware. For more information, please see - Documentation/kunit/ + special hardware when using UML. Can also be used on most other + architectures. For more information, please see Documentation/kunit/. + +config KUNIT_TEST + bool "KUnit test for KUnit" + depends on KUNIT + help + Enables the unit tests for the KUnit test framework. These tests test + the KUnit test framework itself; the tests are both written using + KUnit and test KUnit. This option should only be enabled for testing + purposes by developers interested in testing that KUnit works as + expected. + +config KUNIT_EXAMPLE_TEST + bool "Example test for KUnit" + depends on KUNIT + help + Enables an example unit test that illustrates some of the basic + features of KUnit. This test only exists to help new users understand + what KUnit is and how it is used. Please refer to the example test + itself, kunit/example-test.c, for more information. This option is + intended for curious hackers who would like to understand how to use + KUnit for kernel development. endmenu diff --git a/kunit/Makefile b/kunit/Makefile index 6ddc622ee6b1c..60a9ea6cb4697 100644 --- a/kunit/Makefile +++ b/kunit/Makefile @@ -1,3 +1,7 @@ obj-$(CONFIG_KUNIT) += test.o \ string-stream.o \ kunit-stream.o + +obj-$(CONFIG_KUNIT_TEST) += string-stream-test.o + +obj-$(CONFIG_KUNIT_EXAMPLE_TEST) += example-test.o diff --git a/kunit/example-test.c b/kunit/example-test.c new file mode 100644 index 0000000000000..3947dd7c8f922 --- /dev/null +++ b/kunit/example-test.c @@ -0,0 +1,88 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Example KUnit test to show how to use KUnit. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#include + +/* + * This is the most fundamental element of KUnit, the test case. A test case + * makes a set EXPECTATIONs and ASSERTIONs about the behavior of some code; if + * any expectations or assertions are not met, the test fails; otherwise, the + * test passes. + * + * In KUnit, a test case is just a function with the signature + * `void (*)(struct kunit *)`. `struct kunit` is a context object that stores + * information about the current test. + */ +static void example_simple_test(struct kunit *test) +{ + /* + * This is an EXPECTATION; it is how KUnit tests things. When you want + * to test a piece of code, you set some expectations about what the + * code should do. KUnit then runs the test and verifies that the code's + * behavior matched what was expected. + */ + KUNIT_EXPECT_EQ(test, 1 + 1, 2); +} + +/* + * This is run once before each test case, see the comment on + * example_test_module for more information. + */ +static int example_test_init(struct kunit *test) +{ + kunit_info(test, "initializing\n"); + + return 0; +} + +/* + * Here we make a list of all the test cases we want to add to the test module + * below. + */ +static struct kunit_case example_test_cases[] = { + /* + * This is a helper to create a test case object from a test case + * function; its exact function is not important to understand how to + * use KUnit, just know that this is how you associate test cases with a + * test module. + */ + KUNIT_CASE(example_simple_test), + {}, +}; + +/* + * This defines a suite or grouping of tests. + * + * Test cases are defined as belonging to the suite by adding them to + * `kunit_cases`. + * + * Often it is desirable to run some function which will set up things which + * will be used by every test; this is accomplished with an `init` function + * which runs before each test case is invoked. Similarly, an `exit` function + * may be specified which runs after every test case and can be used to for + * cleanup. For clarity, running tests in a test module would behave as follows: + * + * module.init(test); + * module.test_case[0](test); + * module.exit(test); + * module.init(test); + * module.test_case[1](test); + * module.exit(test); + * ...; + */ +static struct kunit_module example_test_module = { + .name = "example", + .init = example_test_init, + .test_cases = example_test_cases, +}; + +/* + * This registers the above test module telling KUnit that this is a suite of + * tests that need to be run. + */ +module_test(example_test_module); diff --git a/kunit/string-stream-test.c b/kunit/string-stream-test.c new file mode 100644 index 0000000000000..9cbd99236d15e --- /dev/null +++ b/kunit/string-stream-test.c @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit test for struct string_stream. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#include +#include +#include + +static void string_stream_test_get_string(struct kunit *test) +{ + struct string_stream *stream = new_string_stream(); + char *output; + + string_stream_add(stream, "Foo"); + string_stream_add(stream, " %s", "bar"); + + output = string_stream_get_string(stream); + KUNIT_EXPECT_STREQ(test, output, "Foo bar"); + kfree(output); + destroy_string_stream(stream); +} + +static void string_stream_test_add_and_clear(struct kunit *test) +{ + struct string_stream *stream = new_string_stream(); + char *output; + int i; + + for (i = 0; i < 10; i++) + string_stream_add(stream, "A"); + + output = string_stream_get_string(stream); + KUNIT_EXPECT_STREQ(test, output, "AAAAAAAAAA"); + KUNIT_EXPECT_EQ(test, stream->length, 10); + KUNIT_EXPECT_FALSE(test, string_stream_is_empty(stream)); + kfree(output); + + string_stream_clear(stream); + + output = string_stream_get_string(stream); + KUNIT_EXPECT_STREQ(test, output, ""); + KUNIT_EXPECT_TRUE(test, string_stream_is_empty(stream)); + destroy_string_stream(stream); +} + +static struct kunit_case string_stream_test_cases[] = { + KUNIT_CASE(string_stream_test_get_string), + KUNIT_CASE(string_stream_test_add_and_clear), + {} +}; + +static struct kunit_module string_stream_test_module = { + .name = "string-stream-test", + .test_cases = string_stream_test_cases +}; +module_test(string_stream_test_module);