From patchwork Fri Jul 12 08:17:27 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brendan Higgins X-Patchwork-Id: 11041683 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 AA2B0912 for ; Fri, 12 Jul 2019 08:17:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 97D5D28BC6 for ; Fri, 12 Jul 2019 08:17:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8A79928BC9; Fri, 12 Jul 2019 08:17:57 +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=-2.7 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B1EAB28B8E for ; Fri, 12 Jul 2019 08:17:56 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 1D3A6212B6D60; Fri, 12 Jul 2019 01:20:23 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=2607:f8b0:4864:20::74a; helo=mail-qk1-x74a.google.com; envelope-from=3meioxq4kdeuiylukhuopnnpuznvvnsl.jvtspu14-u2kpttspz0z.78.vyn@flex--brendanhiggins.bounces.google.com; receiver=linux-nvdimm@lists.01.org Received: from mail-qk1-x74a.google.com (mail-qk1-x74a.google.com [IPv6:2607:f8b0:4864:20::74a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 90DDF212AF0DC for ; Fri, 12 Jul 2019 01:20:21 -0700 (PDT) Received: by mail-qk1-x74a.google.com with SMTP id t196so6266745qke.0 for ; Fri, 12 Jul 2019 01:17:54 -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=68UH8GPC03ZUmc9czSTxKw69fYzf9vHRgfEO5fBFGxw=; b=lr5zDKnN4gMLf9gUMo8Oq1GDbkCPMxvFO2+ffgSkbPWPOgbwI0qNIOSYELmjQqYJGm p9HdHOWp1PUFOQYgRx2p6/m9009o4z/A4oF012IV77bK4mIosS6LmjBQH4yUSjbnKGIa Eak9wX/VqDPDcPP89MOolC8gqUQNJQDd5vwzjbYyWzlVZ8XIcB/Nz9puFSZTU/Z8+gDE 2zkiwql8msFk5DVcKqYLiq77lTK2HS/rgar40uYVFeMGA1JpyLhB7WLJVY1Zy8b6KpmM ii8gmnVsWPyubOSb+LhfRMyQhngwdKrC5LN/1ak6wovVMSJ5r/B7Fv6WXjqYmi/qo1wQ eNhw== 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=68UH8GPC03ZUmc9czSTxKw69fYzf9vHRgfEO5fBFGxw=; b=cw/EvIqJW/EtYHbpiiKkHwJH4MxvvQ7oIg5EQ/OAf/WvuKXxQ8/NClThIAW31c4LS3 7pBaeb3pxWvOtcVWImNTqyFzcEsqV7aqWGBE+T+yFEW8vSy2UWJqetSi+bsa/SrJ4Z3I 56cq6sjVp7X62BlUFxQTQPubQ4f4Yroa8lQKLA64JlxUyP6CgPicoLWdrMkH+8ZjH7nT vJZZCVr5ZPOxyeVWQ94GxVnF3K36R3jf0ZHJKD5M7dyx+1ENW9h7yZucZbYfREHlWx6h Dq5vUAHwX90AT8z567wLjAGlL2gZJ6u1M4BDapG1XvIo9UTDBKmYvxqLri5ZLRAYICRu ErQA== X-Gm-Message-State: APjAAAX4Z9fCxq8ovLTHnPftILjrg1NWV63/IBybbw7KvZW6gZJ9Tciv A4aJiUJkGoZuksvqqPZ2XMRKbFHSYiTRY9gFcCSwRw== X-Google-Smtp-Source: APXvYqw2GsjRLoRKGwQo9Cju2JXN+d8eA4noL8Q3AlMMnWqUBjlpZB7NIxXCVgalPyDHJhh5ntsy3GFBW96qcUPPX4VF1g== X-Received: by 2002:ac8:764f:: with SMTP id i15mr5217164qtr.194.1562919472957; Fri, 12 Jul 2019 01:17:52 -0700 (PDT) Date: Fri, 12 Jul 2019 01:17:27 -0700 In-Reply-To: <20190712081744.87097-1-brendanhiggins@google.com> Message-Id: <20190712081744.87097-2-brendanhiggins@google.com> Mime-Version: 1.0 References: <20190712081744.87097-1-brendanhiggins@google.com> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH v9 01/18] kunit: test: add KUnit test runner core From: Brendan Higgins To: frowand.list@gmail.com, gregkh@linuxfoundation.org, jpoimboe@redhat.com, keescook@google.com, kieran.bingham@ideasonboard.com, mcgrof@kernel.org, peterz@infradead.org, robh@kernel.org, sboyd@kernel.org, shuah@kernel.org, tytso@mit.edu, yamada.masahiro@socionext.com X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pmladek@suse.com, linux-doc@vger.kernel.org, amir73il@gmail.com, Brendan Higgins , dri-devel@lists.freedesktop.org, Alexander.Levin@microsoft.com, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, khilman@baylibre.com, knut.omang@oracle.com, wfg@linux.intel.com, joel@jms.id.au, rientjes@google.com, jdike@addtoit.com, dan.carpenter@oracle.com, devicetree@vger.kernel.org, linux-kbuild@vger.kernel.org, Tim.Bird@sony.com, linux-um@lists.infradead.org, rostedt@goodmis.org, julia.lawall@lip6.fr, kunit-dev@googlegroups.com, richard@nod.at, rdunlap@infradead.org, linux-kernel@vger.kernel.org, daniel@ffwll.ch, mpe@ellerman.id.au, linux-fsdevel@vger.kernel.org Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP Add core facilities for defining unit tests; this provides a common way to define test cases, functions that execute code which is under test and determine whether the code under test behaves as expected; this also provides a way to group together related test cases in test suites (here we call them test_modules). Just define test cases and how to execute them for now; setting expectations on code will be defined later. Signed-off-by: Brendan Higgins Reviewed-by: Greg Kroah-Hartman Reviewed-by: Logan Gunthorpe Reviewed-by: Luis Chamberlain Reviewed-by: Stephen Boyd --- include/kunit/test.h | 179 ++++++++++++++++++++++++++++++++++++++++ kunit/Kconfig | 17 ++++ kunit/Makefile | 1 + kunit/test.c | 189 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 386 insertions(+) create mode 100644 include/kunit/test.h create mode 100644 kunit/Kconfig create mode 100644 kunit/Makefile create mode 100644 kunit/test.c diff --git a/include/kunit/test.h b/include/kunit/test.h new file mode 100644 index 0000000000000..e0b34acb9ee4e --- /dev/null +++ b/include/kunit/test.h @@ -0,0 +1,179 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Base unit test (KUnit) API. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#ifndef _KUNIT_TEST_H +#define _KUNIT_TEST_H + +#include + +struct kunit; + +/** + * struct kunit_case - represents an individual test case. + * @run_case: the function representing the actual test case. + * @name: the name of the test case. + * + * A test case is a function with the signature, ``void (*)(struct kunit *)`` + * that makes expectations (see KUNIT_EXPECT_TRUE()) about code under test. Each + * test case is associated with a &struct kunit_suite and will be run after the + * suite's init function and followed by the suite's exit function. + * + * A test case should be static and should only be created with the KUNIT_CASE() + * macro; additionally, every array of test cases should be terminated with an + * empty test case. + * + * Example: + * + * .. code-block:: c + * + * void add_test_basic(struct kunit *test) + * { + * KUNIT_EXPECT_EQ(test, 1, add(1, 0)); + * KUNIT_EXPECT_EQ(test, 2, add(1, 1)); + * KUNIT_EXPECT_EQ(test, 0, add(-1, 1)); + * KUNIT_EXPECT_EQ(test, INT_MAX, add(0, INT_MAX)); + * KUNIT_EXPECT_EQ(test, -1, add(INT_MAX, INT_MIN)); + * } + * + * static struct kunit_case example_test_cases[] = { + * KUNIT_CASE(add_test_basic), + * {} + * }; + * + */ +struct kunit_case { + void (*run_case)(struct kunit *test); + const char *name; + + /* private: internal use only. */ + bool success; +}; + +/** + * KUNIT_CASE - A helper for creating a &struct kunit_case + * @test_name: a reference to a test case function. + * + * Takes a symbol for a function representing a test case and creates a + * &struct kunit_case object from it. See the documentation for + * &struct kunit_case for an example on how to use it. + */ +#define KUNIT_CASE(test_name) { .run_case = test_name, .name = #test_name } + +/** + * struct kunit_suite - describes a related collection of &struct kunit_case s. + * @name: the name of the test. Purely informational. + * @init: called before every test case. + * @exit: called after every test case. + * @test_cases: a null terminated array of test cases. + * + * A kunit_suite is a collection of related &struct kunit_case s, such that + * @init is called before every test case and @exit is called after every test + * case, similar to the notion of a *test fixture* or a *test class* in other + * unit testing frameworks like JUnit or Googletest. + * + * Every &struct kunit_case must be associated with a kunit_suite for KUnit to + * run it. + */ +struct kunit_suite { + const char name[256]; + int (*init)(struct kunit *test); + void (*exit)(struct kunit *test); + struct kunit_case *test_cases; +}; + +/** + * struct kunit - represents a running instance of a test. + * @priv: for user to store arbitrary data. Commonly used to pass data created + * in the init function (see &struct kunit_suite). + * + * Used to store information about the current context under which the test is + * running. Most of this data is private and should only be accessed indirectly + * via public functions; the one exception is @priv which can be used by the + * test writer to store arbitrary data. + */ +struct kunit { + void *priv; + + /* private: internal use only. */ + const char *name; /* Read only after initialization! */ + /* + * success starts as true, and may only be set to false during a test + * case; thus, it is safe to update this across multiple threads using + * WRITE_ONCE; however, as a consequence, it may only be read after the + * test case finishes once all threads associated with the test case + * have terminated. + */ + bool success; /* Read only after test_case finishes! */ +}; + +void kunit_init_test(struct kunit *test, const char *name); + +int kunit_run_tests(struct kunit_suite *suite); + +/** + * kunit_test_suite() - used to register a &struct kunit_suite with KUnit. + * @suite: a statically allocated &struct kunit_suite. + * + * Registers @suite with the test framework. See &struct kunit_suite for more + * information. + * + * NOTE: Currently KUnit tests are all run as late_initcalls; this means that + * they cannot test anything where tests must run at a different init phase. One + * significant restriction resulting from this is that KUnit cannot reliably + * test anything that is initialize in the late_init phase; another is that + * KUnit is useless to test things that need to be run in an earlier init phase. + */ +#define kunit_test_suite(suite) \ + /* + * TODO(brendanhiggins@google.com): Don't run all KUnit tests as + * late_initcalls. I have some future work planned to dispatch + * all KUnit tests from the same place, and at the very least to + * do so after everything else is definitely initialized. + */ \ + static int kunit_suite_init##suite(void) \ + { \ + return kunit_run_tests(&suite); \ + } \ + late_initcall(kunit_suite_init##suite) + +void __printf(3, 4) kunit_printk(const char *level, + const struct kunit *test, + const char *fmt, ...); + +/** + * kunit_info() - Prints an INFO level message associated with the current test. + * @test: The test context object. + * @fmt: A printk() style format string. + * + * Prints an info level message associated with the test suite being run. Takes + * a variable number of format parameters just like printk(). + */ +#define kunit_info(test, fmt, ...) \ + kunit_printk(KERN_INFO, test, fmt, ##__VA_ARGS__) + +/** + * kunit_warn() - Prints a WARN level message associated with the current test. + * @test: The test context object. + * @fmt: A printk() style format string. + * + * Prints a warning level message. + */ +#define kunit_warn(test, fmt, ...) \ + kunit_printk(KERN_WARNING, test, fmt, ##__VA_ARGS__) + +/** + * kunit_err() - Prints an ERROR level message associated with the current test. + * @test: The test context object. + * @fmt: A printk() style format string. + * + * Prints an error level message. + */ +#define kunit_err(test, fmt, ...) \ + kunit_printk(KERN_ERR, test, fmt, ##__VA_ARGS__) + +#endif /* _KUNIT_TEST_H */ diff --git a/kunit/Kconfig b/kunit/Kconfig new file mode 100644 index 0000000000000..330ae83527c23 --- /dev/null +++ b/kunit/Kconfig @@ -0,0 +1,17 @@ +# +# KUnit base configuration +# + +menu "KUnit support" + +config KUNIT + bool "Enable support for unit tests (KUnit)" + help + 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 when using UML. Can also be used on most other + architectures. For more information, please see + Documentation/dev-tools/kunit/. + +endmenu diff --git a/kunit/Makefile b/kunit/Makefile new file mode 100644 index 0000000000000..5efdc4dea2c08 --- /dev/null +++ b/kunit/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_KUNIT) += test.o diff --git a/kunit/test.c b/kunit/test.c new file mode 100644 index 0000000000000..571e4c65deb5c --- /dev/null +++ b/kunit/test.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Base unit test (KUnit) API. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#include +#include + +static void kunit_set_failure(struct kunit *test) +{ + WRITE_ONCE(test->success, false); +} + +static int kunit_vprintk_emit(int level, const char *fmt, va_list args) +{ + return vprintk_emit(0, level, NULL, 0, fmt, args); +} + +static int kunit_printk_emit(int level, const char *fmt, ...) +{ + va_list args; + int ret; + + va_start(args, fmt); + ret = kunit_vprintk_emit(level, fmt, args); + va_end(args); + + return ret; +} + +static void kunit_vprintk(const struct kunit *test, + const char *level, + struct va_format *vaf) +{ + kunit_printk_emit(level[1] - '0', "\t# %s: %pV", test->name, vaf); +} + +static void kunit_print_tap_version(void) +{ + static bool kunit_has_printed_tap_version; + + if (!kunit_has_printed_tap_version) { + kunit_printk_emit(LOGLEVEL_INFO, "TAP version 14\n"); + kunit_has_printed_tap_version = true; + } +} + +static size_t kunit_test_cases_len(struct kunit_case *test_cases) +{ + struct kunit_case *test_case; + size_t len = 0; + + for (test_case = test_cases; test_case->run_case; test_case++) + len++; + + return len; +} + +static void kunit_print_subtest_start(struct kunit_suite *suite) +{ + kunit_print_tap_version(); + kunit_printk_emit(LOGLEVEL_INFO, "\t# Subtest: %s\n", suite->name); + kunit_printk_emit(LOGLEVEL_INFO, + "\t1..%zd\n", + kunit_test_cases_len(suite->test_cases)); +} + +static void kunit_print_ok_not_ok(bool should_indent, + bool is_ok, + size_t test_number, + const char *description) +{ + const char *indent, *ok_not_ok; + + if (should_indent) + indent = "\t"; + else + indent = ""; + + if (is_ok) + ok_not_ok = "ok"; + else + ok_not_ok = "not ok"; + + kunit_printk_emit(LOGLEVEL_INFO, + "%s%s %zd - %s\n", + indent, ok_not_ok, test_number, description); +} + +static bool kunit_suite_has_succeeded(struct kunit_suite *suite) +{ + const struct kunit_case *test_case; + + for (test_case = suite->test_cases; test_case->run_case; test_case++) + if (!test_case->success) + return false; + + return true; +} + +static void kunit_print_subtest_end(struct kunit_suite *suite) +{ + static size_t kunit_suite_counter = 1; + + kunit_print_ok_not_ok(false, + kunit_suite_has_succeeded(suite), + kunit_suite_counter++, + suite->name); +} + +static void kunit_print_test_case_ok_not_ok(struct kunit_case *test_case, + size_t test_number) +{ + kunit_print_ok_not_ok(true, + test_case->success, + test_number, + test_case->name); +} + +void kunit_init_test(struct kunit *test, const char *name) +{ + test->name = name; + test->success = true; +} + +/* + * Performs all logic to run a test case. + */ +static void kunit_run_case(struct kunit_suite *suite, + struct kunit_case *test_case) +{ + struct kunit test; + int ret = 0; + + kunit_init_test(&test, test_case->name); + + if (suite->init) { + ret = suite->init(&test); + if (ret) { + kunit_err(&test, "failed to initialize: %d\n", ret); + kunit_set_failure(&test); + return; + } + } + + test_case->run_case(&test); + + if (suite->exit) + suite->exit(&test); + + test_case->success = test.success; +} + +int kunit_run_tests(struct kunit_suite *suite) +{ + struct kunit_case *test_case; + size_t test_case_count = 1; + + kunit_print_subtest_start(suite); + + for (test_case = suite->test_cases; test_case->run_case; test_case++) { + kunit_run_case(suite, test_case); + kunit_print_test_case_ok_not_ok(test_case, test_case_count++); + } + + kunit_print_subtest_end(suite); + + return 0; +} + +void kunit_printk(const char *level, + const struct kunit *test, + const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; + + kunit_vprintk(test, level, &vaf); + + va_end(args); +}