[RFC,v1,08/12] kunit: mock: add basic matchers and actions

Message ID	20200918183114.2571146-9-dlatypov@google.com (mailing list archive)
State	New
Headers	show Return-Path: <SRS0=yemh=C3=vger.kernel.org=linux-kselftest-owner@kernel.org> Date: Fri, 18 Sep 2020 11:31:10 -0700 In-Reply-To: <20200918183114.2571146-1-dlatypov@google.com> Message-Id: <20200918183114.2571146-9-dlatypov@google.com> Mime-Version: 1.0 References: <20200918183114.2571146-1-dlatypov@google.com> Subject: [RFC v1 08/12] kunit: mock: add basic matchers and actions From: Daniel Latypov <dlatypov@google.com> To: Brendan Higgins <brendanhiggins@google.com>, David Gow <davidgow@google.com>, Shuah Khan <skhan@linuxfoundation.org> Cc: kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>, Luis Chamberlain <mcgrof@kernel.org>, Alan Maguire <alan.maguire@oracle.com>, Stephen Boyd <sboyd@kernel.org>, Daniel Latypov <dlatypov@google.com> Content-Type: text/plain; charset="UTF-8" Precedence: bulk
Series	kunit: introduce class mocking support. \| expand [RFC,v1,00/12] kunit: introduce class mocking support. [RFC,v1,01/12] Revert "kunit: move string-stream.h to lib/kunit" [RFC,v1,02/12] kunit: test: add kunit_stream a std::stream like logger [RFC,v1,03/12] kunit: test: add concept of post conditions [RFC,v1,04/12] checkpatch: add support for struct MOCK(foo) syntax [RFC,v1,05/12] kunit: mock: add parameter list manipulation macros [RFC,v1,06/12] kunit: expose kunit_set_failure() for use by mocking [RFC,v1,07/12] kunit: mock: add internal mock infrastructure [RFC,v1,08/12] kunit: mock: add basic matchers and actions [RFC,v1,09/12] kunit: mock: add macro machinery to pick correct format args [RFC,v1,10/12] kunit: mock: add class mocking support [RFC,v1,11/12] kunit: mock: add struct param matcher [RFC,v1,12/12] kunit: mock: implement nice, strict and naggy mock distinctions

diff --git a/include/kunit/mock.h b/include/kunit/mock.h index 299b423fdd51..13fdeb8730b5 100644 --- a/include/kunit/mock.h +++ b/include/kunit/mock.h @@ -123,4 +123,226 @@ struct mock_expectation *mock_add_matcher(struct mock *mock, struct mock_param_matcher *matchers[], int len); +#define CONVERT_TO_ACTUAL_TYPE(type, ptr) (*((type *) ptr)) + +/** + * DOC: Built In Matchers + * + * These are the matchers that can be used when matching arguments in + * :c:func:`KUNIT_EXPECT_CALL` (more can be defined manually). + * + * For example, there's a matcher that matches any arguments: + * + * .. code-block:: c + * + * struct mock_param_matcher *any(struct kunit *test); + * + * There are matchers for integers based on the binary condition: + * + * * eq: equals to + * * ne: not equal to + * * lt: less than + * * le: less than or equal to + * * gt: greater than + * * ge: greater than or equal to + * + * .. code-block:: c + * + * struct mock_param_matcher *kunit_int_eq(struct kunit *test, int expected); + * struct mock_param_matcher *kunit_int_ne(struct kunit *test, int expected); + * struct mock_param_matcher *kunit_int_lt(struct kunit *test, int expected); + * struct mock_param_matcher *kunit_int_le(struct kunit *test, int expected); + * struct mock_param_matcher *kunit_int_gt(struct kunit *test, int expected); + * struct mock_param_matcher *kunit_int_ge(struct kunit *test, int expected); + * + * For a detailed list, please see + * ``include/linux/mock.h``. + */ + +/* Matches any argument */ +struct mock_param_matcher *kunit_any(struct kunit *test); + +/* + * Matches different types of integers, the argument is compared to the + * `expected` field, based on the comparison defined. + */ +struct mock_param_matcher *kunit_u8_eq(struct kunit *test, u8 expected); +struct mock_param_matcher *kunit_u8_ne(struct kunit *test, u8 expected); +struct mock_param_matcher *kunit_u8_le(struct kunit *test, u8 expected); +struct mock_param_matcher *kunit_u8_lt(struct kunit *test, u8 expected); +struct mock_param_matcher *kunit_u8_ge(struct kunit *test, u8 expected); +struct mock_param_matcher *kunit_u8_gt(struct kunit *test, u8 expected); + +struct mock_param_matcher *kunit_u16_eq(struct kunit *test, u16 expected); +struct mock_param_matcher *kunit_u16_ne(struct kunit *test, u16 expected); +struct mock_param_matcher *kunit_u16_le(struct kunit *test, u16 expected); +struct mock_param_matcher *kunit_u16_lt(struct kunit *test, u16 expected); +struct mock_param_matcher *kunit_u16_ge(struct kunit *test, u16 expected); +struct mock_param_matcher *kunit_u16_gt(struct kunit *test, u16 expected); + +struct mock_param_matcher *kunit_u32_eq(struct kunit *test, u32 expected); +struct mock_param_matcher *kunit_u32_ne(struct kunit *test, u32 expected); +struct mock_param_matcher *kunit_u32_le(struct kunit *test, u32 expected); +struct mock_param_matcher *kunit_u32_lt(struct kunit *test, u32 expected); +struct mock_param_matcher *kunit_u32_ge(struct kunit *test, u32 expected); +struct mock_param_matcher *kunit_u32_gt(struct kunit *test, u32 expected); + +struct mock_param_matcher *kunit_u64_eq(struct kunit *test, u64 expected); +struct mock_param_matcher *kunit_u64_ne(struct kunit *test, u64 expected); +struct mock_param_matcher *kunit_u64_le(struct kunit *test, u64 expected); +struct mock_param_matcher *kunit_u64_lt(struct kunit *test, u64 expected); +struct mock_param_matcher *kunit_u64_ge(struct kunit *test, u64 expected); +struct mock_param_matcher *kunit_u64_gt(struct kunit *test, u64 expected); + +struct mock_param_matcher *kunit_char_eq(struct kunit *test, char expected); +struct mock_param_matcher *kunit_char_ne(struct kunit *test, char expected); +struct mock_param_matcher *kunit_char_le(struct kunit *test, char expected); +struct mock_param_matcher *kunit_char_lt(struct kunit *test, char expected); +struct mock_param_matcher *kunit_char_ge(struct kunit *test, char expected); +struct mock_param_matcher *kunit_char_gt(struct kunit *test, char expected); + +struct mock_param_matcher *kunit_uchar_eq(struct kunit *test, + unsigned char expected); +struct mock_param_matcher *kunit_uchar_ne(struct kunit *test, + unsigned char expected); +struct mock_param_matcher *kunit_uchar_le(struct kunit *test, + unsigned char expected); +struct mock_param_matcher *kunit_uchar_lt(struct kunit *test, + unsigned char expected); +struct mock_param_matcher *kunit_uchar_ge(struct kunit *test, + unsigned char expected); +struct mock_param_matcher *kunit_uchar_gt(struct kunit *test, + unsigned char expected); + +struct mock_param_matcher *kunit_schar_eq(struct kunit *test, + signed char expected); +struct mock_param_matcher *kunit_schar_ne(struct kunit *test, + signed char expected); +struct mock_param_matcher *kunit_schar_le(struct kunit *test, + signed char expected); +struct mock_param_matcher *kunit_schar_lt(struct kunit *test, + signed char expected); +struct mock_param_matcher *kunit_schar_ge(struct kunit *test, + signed char expected); +struct mock_param_matcher *kunit_schar_gt(struct kunit *test, + signed char expected); + +struct mock_param_matcher *kunit_short_eq(struct kunit *test, short expected); +struct mock_param_matcher *kunit_short_ne(struct kunit *test, short expected); +struct mock_param_matcher *kunit_short_le(struct kunit *test, short expected); +struct mock_param_matcher *kunit_short_lt(struct kunit *test, short expected); +struct mock_param_matcher *kunit_short_ge(struct kunit *test, short expected); +struct mock_param_matcher *kunit_short_gt(struct kunit *test, short expected); + +struct mock_param_matcher *kunit_ushort_eq(struct kunit *test, + unsigned short expected); +struct mock_param_matcher *kunit_ushort_ne(struct kunit *test, + unsigned short expected); +struct mock_param_matcher *kunit_ushort_le(struct kunit *test, + unsigned short expected); +struct mock_param_matcher *kunit_ushort_lt(struct kunit *test, + unsigned short expected); +struct mock_param_matcher *kunit_ushort_ge(struct kunit *test, + unsigned short expected); +struct mock_param_matcher *kunit_ushort_gt(struct kunit *test, + unsigned short expected); + +struct mock_param_matcher *kunit_int_eq(struct kunit *test, int expected); +struct mock_param_matcher *kunit_int_ne(struct kunit *test, int expected); +struct mock_param_matcher *kunit_int_lt(struct kunit *test, int expected); +struct mock_param_matcher *kunit_int_le(struct kunit *test, int expected); +struct mock_param_matcher *kunit_int_gt(struct kunit *test, int expected); +struct mock_param_matcher *kunit_int_ge(struct kunit *test, int expected); + +struct mock_param_matcher *kunit_uint_eq(struct kunit *test, + unsigned int expected); +struct mock_param_matcher *kunit_uint_ne(struct kunit *test, + unsigned int expected); +struct mock_param_matcher *kunit_uint_lt(struct kunit *test, + unsigned int expected); +struct mock_param_matcher *kunit_uint_le(struct kunit *test, + unsigned int expected); +struct mock_param_matcher *kunit_uint_gt(struct kunit *test, + unsigned int expected); +struct mock_param_matcher *kunit_uint_ge(struct kunit *test, + unsigned int expected); + +struct mock_param_matcher *kunit_long_eq(struct kunit *test, long expected); +struct mock_param_matcher *kunit_long_ne(struct kunit *test, long expected); +struct mock_param_matcher *kunit_long_le(struct kunit *test, long expected); +struct mock_param_matcher *kunit_long_lt(struct kunit *test, long expected); +struct mock_param_matcher *kunit_long_ge(struct kunit *test, long expected); +struct mock_param_matcher *kunit_long_gt(struct kunit *test, long expected); + +struct mock_param_matcher *kunit_ulong_eq(struct kunit *test, + unsigned long expected); +struct mock_param_matcher *kunit_ulong_ne(struct kunit *test, + unsigned long expected); +struct mock_param_matcher *kunit_ulong_le(struct kunit *test, + unsigned long expected); +struct mock_param_matcher *kunit_ulong_lt(struct kunit *test, + unsigned long expected); +struct mock_param_matcher *kunit_ulong_ge(struct kunit *test, + unsigned long expected); +struct mock_param_matcher *kunit_ulong_gt(struct kunit *test, + unsigned long expected); + +struct mock_param_matcher *kunit_longlong_eq(struct kunit *test, + long long expected); +struct mock_param_matcher *kunit_longlong_ne(struct kunit *test, + long long expected); +struct mock_param_matcher *kunit_longlong_le(struct kunit *test, + long long expected); +struct mock_param_matcher *kunit_longlong_lt(struct kunit *test, + long long expected); +struct mock_param_matcher *kunit_longlong_ge(struct kunit *test, + long long expected); +struct mock_param_matcher *kunit_longlong_gt(struct kunit *test, + long long expected); + +struct mock_param_matcher *kunit_ulonglong_eq(struct kunit *test, + unsigned long long expected); +struct mock_param_matcher *kunit_ulonglong_ne(struct kunit *test, + unsigned long long expected); +struct mock_param_matcher *kunit_ulonglong_le(struct kunit *test, + unsigned long long expected); +struct mock_param_matcher *kunit_ulonglong_lt(struct kunit *test, + unsigned long long expected); +struct mock_param_matcher *kunit_ulonglong_ge(struct kunit *test, + unsigned long long expected); +struct mock_param_matcher *kunit_ulonglong_gt(struct kunit *test, + unsigned long long expected); + +/* Matches pointers. */ +struct mock_param_matcher *kunit_ptr_eq(struct kunit *test, void *expected); +struct mock_param_matcher *kunit_ptr_ne(struct kunit *test, void *expected); +struct mock_param_matcher *kunit_ptr_lt(struct kunit *test, void *expected); +struct mock_param_matcher *kunit_ptr_le(struct kunit *test, void *expected); +struct mock_param_matcher *kunit_ptr_gt(struct kunit *test, void *expected); +struct mock_param_matcher *kunit_ptr_ge(struct kunit *test, void *expected); + +/* Matches memory sections and strings. */ +struct mock_param_matcher *kunit_memeq(struct kunit *test, + const void *buf, + size_t size); +struct mock_param_matcher *kunit_streq(struct kunit *test, const char *str); + +struct mock_action *kunit_u8_return(struct kunit *test, u8 ret); +struct mock_action *kunit_u16_return(struct kunit *test, u16 ret); +struct mock_action *kunit_u32_return(struct kunit *test, u32 ret); +struct mock_action *kunit_u64_return(struct kunit *test, u64 ret); +struct mock_action *kunit_char_return(struct kunit *test, char ret); +struct mock_action *kunit_uchar_return(struct kunit *test, unsigned char ret); +struct mock_action *kunit_schar_return(struct kunit *test, signed char ret); +struct mock_action *kunit_short_return(struct kunit *test, short ret); +struct mock_action *kunit_ushort_return(struct kunit *test, unsigned short ret); +struct mock_action *kunit_int_return(struct kunit *test, int ret); +struct mock_action *kunit_uint_return(struct kunit *test, unsigned int ret); +struct mock_action *kunit_long_return(struct kunit *test, long ret); +struct mock_action *kunit_ulong_return(struct kunit *test, unsigned long ret); +struct mock_action *kunit_longlong_return(struct kunit *test, long long ret); +struct mock_action *kunit_ulonglong_return(struct kunit *test, + unsigned long long ret); +struct mock_action *kunit_ptr_return(struct kunit *test, void *ret); + #endif /* _KUNIT_MOCK_H */ diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index a51157970502..a7a3c5e0a8bf 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_KUNIT) += kunit.o kunit-objs += test.o \ mock.o \ + common-mocks.o \ string-stream.o \ assert.o \ kunit-stream.o \ diff --git a/lib/kunit/common-mocks.c b/lib/kunit/common-mocks.c new file mode 100644 index 000000000000..b3a410fda63a --- /dev/null +++ b/lib/kunit/common-mocks.c @@ -0,0 +1,271 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Common KUnit mock call arg matchers and formatters. + * + * Copyright (C) 2020, Google LLC. + * Author: Brendan Higgins <brendanhiggins@google.com> + */ + +#include <linux/kernel.h> +#include <kunit/mock.h> + +static bool match_any(struct mock_param_matcher *pmatcher, + struct kunit_stream *stream, + const void *actual) +{ + kunit_stream_add(stream, "don't care"); + return true; +} + +static struct mock_param_matcher any_matcher = { + .match = match_any, +}; + +struct mock_param_matcher *kunit_any(struct kunit *test) +{ + return &any_matcher; +} + +#define DEFINE_MATCHER_STRUCT(type_name, type) \ + struct mock_##type_name##_matcher { \ + struct mock_param_matcher matcher; \ + type expected; \ + } + +#define DEFINE_TO_MATCHER_STRUCT(type_name) \ + struct mock_##type_name##_matcher * \ + to_mock_##type_name##_matcher( \ + struct mock_param_matcher *matcher) \ + { \ + return container_of(matcher, \ + struct mock_##type_name##_matcher, \ + matcher); \ + } + +#define DEFINE_MATCH_FUNC(type_name, type, op_name, op) \ + bool match_##type_name##_##op_name( \ + struct mock_param_matcher *pmatcher, \ + struct kunit_stream *stream, \ + const void *pactual) \ + { \ + struct mock_##type_name##_matcher *matcher = \ + to_mock_##type_name##_matcher(pmatcher); \ + type actual = *((type *) pactual); \ + bool matches = actual op matcher->expected; \ + \ + if (matches) \ + kunit_stream_add(stream, \ + "%d "#op" %d", \ + actual, \ + matcher->expected); \ + else \ + kunit_stream_add(stream, \ + "%d not "#op" %d", \ + actual, \ + matcher->expected); \ + \ + return matches; \ + } + +#define DEFINE_MATCH_FACTORY(type_name, type, op_name) \ + struct mock_param_matcher *kunit_##type_name##_##op_name( \ + struct kunit *test, type expected) \ + { \ + struct mock_##type_name##_matcher *matcher; \ + \ + matcher = kunit_kmalloc(test, \ + sizeof(*matcher), \ + GFP_KERNEL); \ + if (!matcher) \ + return NULL; \ + \ + matcher->matcher.match = match_##type_name##_##op_name;\ + matcher->expected = expected; \ + return &matcher->matcher; \ + } + +#define DEFINE_MATCHER_WITH_TYPENAME(type_name, type) \ + DEFINE_MATCHER_STRUCT(type_name, type); \ + DEFINE_TO_MATCHER_STRUCT(type_name) \ + DEFINE_MATCH_FUNC(type_name, type, eq, ==) \ + DEFINE_MATCH_FACTORY(type_name, type, eq) \ + DEFINE_MATCH_FUNC(type_name, type, ne, !=) \ + DEFINE_MATCH_FACTORY(type_name, type, ne) \ + DEFINE_MATCH_FUNC(type_name, type, le, <=) \ + DEFINE_MATCH_FACTORY(type_name, type, le) \ + DEFINE_MATCH_FUNC(type_name, type, lt, <) \ + DEFINE_MATCH_FACTORY(type_name, type, lt) \ + DEFINE_MATCH_FUNC(type_name, type, ge, >=) \ + DEFINE_MATCH_FACTORY(type_name, type, ge) \ + DEFINE_MATCH_FUNC(type_name, type, gt, >) \ + DEFINE_MATCH_FACTORY(type_name, type, gt) + +#define DEFINE_MATCHER(type) DEFINE_MATCHER_WITH_TYPENAME(type, type) + +DEFINE_MATCHER(u8); +DEFINE_MATCHER(u16); +DEFINE_MATCHER(u32); +DEFINE_MATCHER(u64); +DEFINE_MATCHER(char); +DEFINE_MATCHER_WITH_TYPENAME(uchar, unsigned char); +DEFINE_MATCHER_WITH_TYPENAME(schar, signed char); +DEFINE_MATCHER(short); +DEFINE_MATCHER_WITH_TYPENAME(ushort, unsigned short); +DEFINE_MATCHER(int); +DEFINE_MATCHER_WITH_TYPENAME(uint, unsigned int); +DEFINE_MATCHER(long); +DEFINE_MATCHER_WITH_TYPENAME(ulong, unsigned long); +DEFINE_MATCHER_WITH_TYPENAME(longlong, long long); +DEFINE_MATCHER_WITH_TYPENAME(ulonglong, unsigned long long); + +DEFINE_MATCHER_WITH_TYPENAME(ptr, void *); + +struct mock_memeq_matcher { + struct mock_param_matcher matcher; + const void *expected; + size_t size; +}; + +static bool match_memeq(struct mock_param_matcher *pmatcher, + struct kunit_stream *stream, + const void *pactual) +{ + struct mock_memeq_matcher *matcher = + container_of(pmatcher, + struct mock_memeq_matcher, + matcher); + const void *actual = CONVERT_TO_ACTUAL_TYPE(const void *, pactual); + bool matches = !memcmp(actual, matcher->expected, matcher->size); + int i; + + for (i = 0; i < matcher->size; i++) + kunit_stream_add(stream, "%02x, ", ((const char *) actual)[i]); + if (matches) + kunit_stream_add(stream, "== "); + else + kunit_stream_add(stream, "!= "); + for (i = 0; i < matcher->size; i++) + kunit_stream_add(stream, + "%02x, ", + ((const char *) matcher->expected)[i]); + + return matches; +} + +struct mock_param_matcher *kunit_memeq(struct kunit *test, + const void *buf, + size_t size) +{ + struct mock_memeq_matcher *matcher; + + matcher = kunit_kzalloc(test, sizeof(*matcher), GFP_KERNEL); + if (!matcher) + return NULL; + + matcher->matcher.match = match_memeq; + matcher->expected = buf; + matcher->size = size; + + return &matcher->matcher; +} + +struct mock_streq_matcher { + struct mock_param_matcher matcher; + const char *expected; +}; + +static bool match_streq(struct mock_param_matcher *pmatcher, + struct kunit_stream *stream, + const void *pactual) +{ + struct mock_streq_matcher *matcher = + container_of(pmatcher, + struct mock_streq_matcher, + matcher); + const char *actual = CONVERT_TO_ACTUAL_TYPE(const char *, pactual); + bool matches = !strcmp(actual, matcher->expected); + + if (matches) + kunit_stream_add(stream, "%s == %s", actual, matcher->expected); + else + kunit_stream_add(stream, "%s != %s", actual, matcher->expected); + + return matches; +} + +struct mock_param_matcher *kunit_streq(struct kunit *test, const char *str) +{ + struct mock_streq_matcher *matcher; + + matcher = kunit_kzalloc(test, sizeof(*matcher), GFP_KERNEL); + if (!matcher) + return NULL; + + matcher->matcher.match = match_streq; + matcher->expected = str; + + return &matcher->matcher; +} + +#define DEFINE_RETURN_ACTION_STRUCT(type_name, type) \ + struct mock_##type_name##_action { \ + struct mock_action action; \ + type ret; \ + } + +#define DEFINE_RETURN_ACTION_FUNC(type_name, type) \ + void *do_##type_name##_return(struct mock_action *paction, \ + const void **params, \ + int len) \ + { \ + struct mock_##type_name##_action *action = \ + container_of(paction, \ + struct mock_##type_name##_action,\ + action); \ + \ + return (void *) &action->ret; \ + } + +#define DEFINE_RETURN_ACTION_FACTORY(type_name, type) \ + struct mock_action *kunit_##type_name##_return( \ + struct kunit *test, \ + type ret) \ + { \ + struct mock_##type_name##_action *action; \ + \ + action = kunit_kmalloc(test, \ + sizeof(*action), \ + GFP_KERNEL); \ + if (!action) \ + return NULL; \ + \ + action->action.do_action = do_##type_name##_return; \ + action->ret = ret; \ + \ + return &action->action; \ + } + +#define DEFINE_RETURN_ACTION_WITH_TYPENAME(type_name, type) \ + DEFINE_RETURN_ACTION_STRUCT(type_name, type); \ + DEFINE_RETURN_ACTION_FUNC(type_name, type); \ + DEFINE_RETURN_ACTION_FACTORY(type_name, type) + +#define DEFINE_RETURN_ACTION(type) \ + DEFINE_RETURN_ACTION_WITH_TYPENAME(type, type) + +DEFINE_RETURN_ACTION(u8); +DEFINE_RETURN_ACTION(u16); +DEFINE_RETURN_ACTION(u32); +DEFINE_RETURN_ACTION(u64); +DEFINE_RETURN_ACTION(char); +DEFINE_RETURN_ACTION_WITH_TYPENAME(uchar, unsigned char); +DEFINE_RETURN_ACTION_WITH_TYPENAME(schar, signed char); +DEFINE_RETURN_ACTION(short); +DEFINE_RETURN_ACTION_WITH_TYPENAME(ushort, unsigned short); +DEFINE_RETURN_ACTION(int); +DEFINE_RETURN_ACTION_WITH_TYPENAME(uint, unsigned int); +DEFINE_RETURN_ACTION(long); +DEFINE_RETURN_ACTION_WITH_TYPENAME(ulong, unsigned long); +DEFINE_RETURN_ACTION_WITH_TYPENAME(longlong, long long); +DEFINE_RETURN_ACTION_WITH_TYPENAME(ulonglong, unsigned long long); +DEFINE_RETURN_ACTION_WITH_TYPENAME(ptr, void *);

[RFC,v1,08/12] kunit: mock: add basic matchers and actions

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