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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Assertion and expectation serialization API.
4 *
5 * Copyright (C) 2019, Google LLC.
6 * Author: Brendan Higgins <brendanhiggins@google.com>
7 */
8
9#ifndef _KUNIT_ASSERT_H
10#define _KUNIT_ASSERT_H
11
12#include <linux/err.h>
13#include <linux/kernel.h>
14
15struct kunit;
16struct string_stream;
17
18/**
19 * enum kunit_assert_type - Type of expectation/assertion.
20 * @KUNIT_ASSERTION: Used to denote that a kunit_assert represents an assertion.
21 * @KUNIT_EXPECTATION: Denotes that a kunit_assert represents an expectation.
22 *
23 * Used in conjunction with a &struct kunit_assert to denote whether it
24 * represents an expectation or an assertion.
25 */
26enum kunit_assert_type {
27 KUNIT_ASSERTION,
28 KUNIT_EXPECTATION,
29};
30
31/**
32 * struct kunit_assert - Data for printing a failed assertion or expectation.
33 * @test: the test case this expectation/assertion is associated with.
34 * @type: the type (either an expectation or an assertion) of this kunit_assert.
35 * @line: the source code line number that the expectation/assertion is at.
36 * @file: the file path of the source file that the expectation/assertion is in.
37 * @message: an optional message to provide additional context.
38 * @format: a function which formats the data in this kunit_assert to a string.
39 *
40 * Represents a failed expectation/assertion. Contains all the data necessary to
41 * format a string to a user reporting the failure.
42 */
43struct kunit_assert {
44 struct kunit *test;
45 enum kunit_assert_type type;
46 int line;
47 const char *file;
48 struct va_format message;
49 void (*format)(const struct kunit_assert *assert,
50 struct string_stream *stream);
51};
52
53/**
54 * KUNIT_INIT_VA_FMT_NULL - Default initializer for struct va_format.
55 *
56 * Used inside a struct initialization block to initialize struct va_format to
57 * default values where fmt and va are null.
58 */
59#define KUNIT_INIT_VA_FMT_NULL { .fmt = NULL, .va = NULL }
60
61/**
62 * KUNIT_INIT_ASSERT_STRUCT() - Initializer for a &struct kunit_assert.
63 * @kunit: The test case that this expectation/assertion is associated with.
64 * @assert_type: The type (assertion or expectation) of this kunit_assert.
65 * @fmt: The formatting function which builds a string out of this kunit_assert.
66 *
67 * The base initializer for a &struct kunit_assert.
68 */
69#define KUNIT_INIT_ASSERT_STRUCT(kunit, assert_type, fmt) { \
70 .test = kunit, \
71 .type = assert_type, \
72 .file = __FILE__, \
73 .line = __LINE__, \
74 .message = KUNIT_INIT_VA_FMT_NULL, \
75 .format = fmt \
76}
77
78void kunit_base_assert_format(const struct kunit_assert *assert,
79 struct string_stream *stream);
80
81void kunit_assert_print_msg(const struct kunit_assert *assert,
82 struct string_stream *stream);
83
84/**
85 * struct kunit_fail_assert - Represents a plain fail expectation/assertion.
86 * @assert: The parent of this type.
87 *
88 * Represents a simple KUNIT_FAIL/KUNIT_ASSERT_FAILURE that always fails.
89 */
90struct kunit_fail_assert {
91 struct kunit_assert assert;
92};
93
94void kunit_fail_assert_format(const struct kunit_assert *assert,
95 struct string_stream *stream);
96
97/**
98 * KUNIT_INIT_FAIL_ASSERT_STRUCT() - Initializer for &struct kunit_fail_assert.
99 * @test: The test case that this expectation/assertion is associated with.
100 * @type: The type (assertion or expectation) of this kunit_assert.
101 *
102 * Initializes a &struct kunit_fail_assert. Intended to be used in
103 * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros.
104 */
105#define KUNIT_INIT_FAIL_ASSERT_STRUCT(test, type) { \
106 .assert = KUNIT_INIT_ASSERT_STRUCT(test, \
107 type, \
108 kunit_fail_assert_format) \
109}
110
111/**
112 * struct kunit_unary_assert - Represents a KUNIT_{EXPECT|ASSERT}_{TRUE|FALSE}
113 * @assert: The parent of this type.
114 * @condition: A string representation of a conditional expression.
115 * @expected_true: True if of type KUNIT_{EXPECT|ASSERT}_TRUE, false otherwise.
116 *
117 * Represents a simple expectation or assertion that simply asserts something is
118 * true or false. In other words, represents the expectations:
119 * KUNIT_{EXPECT|ASSERT}_{TRUE|FALSE}
120 */
121struct kunit_unary_assert {
122 struct kunit_assert assert;
123 const char *condition;
124 bool expected_true;
125};
126
127void kunit_unary_assert_format(const struct kunit_assert *assert,
128 struct string_stream *stream);
129
130/**
131 * KUNIT_INIT_UNARY_ASSERT_STRUCT() - Initializes &struct kunit_unary_assert.
132 * @test: The test case that this expectation/assertion is associated with.
133 * @type: The type (assertion or expectation) of this kunit_assert.
134 * @cond: A string representation of the expression asserted true or false.
135 * @expect_true: True if of type KUNIT_{EXPECT|ASSERT}_TRUE, false otherwise.
136 *
137 * Initializes a &struct kunit_unary_assert. Intended to be used in
138 * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros.
139 */
140#define KUNIT_INIT_UNARY_ASSERT_STRUCT(test, type, cond, expect_true) { \
141 .assert = KUNIT_INIT_ASSERT_STRUCT(test, \
142 type, \
143 kunit_unary_assert_format), \
144 .condition = cond, \
145 .expected_true = expect_true \
146}
147
148/**
149 * struct kunit_ptr_not_err_assert - An expectation/assertion that a pointer is
150 * not NULL and not a -errno.
151 * @assert: The parent of this type.
152 * @text: A string representation of the expression passed to the expectation.
153 * @value: The actual evaluated pointer value of the expression.
154 *
155 * Represents an expectation/assertion that a pointer is not null and is does
156 * not contain a -errno. (See IS_ERR_OR_NULL().)
157 */
158struct kunit_ptr_not_err_assert {
159 struct kunit_assert assert;
160 const char *text;
161 const void *value;
162};
163
164void kunit_ptr_not_err_assert_format(const struct kunit_assert *assert,
165 struct string_stream *stream);
166
167/**
168 * KUNIT_INIT_PTR_NOT_ERR_ASSERT_STRUCT() - Initializes a
169 * &struct kunit_ptr_not_err_assert.
170 * @test: The test case that this expectation/assertion is associated with.
171 * @type: The type (assertion or expectation) of this kunit_assert.
172 * @txt: A string representation of the expression passed to the expectation.
173 * @val: The actual evaluated pointer value of the expression.
174 *
175 * Initializes a &struct kunit_ptr_not_err_assert. Intended to be used in
176 * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros.
177 */
178#define KUNIT_INIT_PTR_NOT_ERR_STRUCT(test, type, txt, val) { \
179 .assert = KUNIT_INIT_ASSERT_STRUCT(test, \
180 type, \
181 kunit_ptr_not_err_assert_format), \
182 .text = txt, \
183 .value = val \
184}
185
186/**
187 * struct kunit_binary_assert - An expectation/assertion that compares two
188 * non-pointer values (for example, KUNIT_EXPECT_EQ(test, 1 + 1, 2)).
189 * @assert: The parent of this type.
190 * @operation: A string representation of the comparison operator (e.g. "==").
191 * @left_text: A string representation of the expression in the left slot.
192 * @left_value: The actual evaluated value of the expression in the left slot.
193 * @right_text: A string representation of the expression in the right slot.
194 * @right_value: The actual evaluated value of the expression in the right slot.
195 *
196 * Represents an expectation/assertion that compares two non-pointer values. For
197 * example, to expect that 1 + 1 == 2, you can use the expectation
198 * KUNIT_EXPECT_EQ(test, 1 + 1, 2);
199 */
200struct kunit_binary_assert {
201 struct kunit_assert assert;
202 const char *operation;
203 const char *left_text;
204 long long left_value;
205 const char *right_text;
206 long long right_value;
207};
208
209void kunit_binary_assert_format(const struct kunit_assert *assert,
210 struct string_stream *stream);
211
212/**
213 * KUNIT_INIT_BINARY_ASSERT_STRUCT() - Initializes a
214 * &struct kunit_binary_assert.
215 * @test: The test case that this expectation/assertion is associated with.
216 * @type: The type (assertion or expectation) of this kunit_assert.
217 * @op_str: A string representation of the comparison operator (e.g. "==").
218 * @left_str: A string representation of the expression in the left slot.
219 * @left_val: The actual evaluated value of the expression in the left slot.
220 * @right_str: A string representation of the expression in the right slot.
221 * @right_val: The actual evaluated value of the expression in the right slot.
222 *
223 * Initializes a &struct kunit_binary_assert. Intended to be used in
224 * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros.
225 */
226#define KUNIT_INIT_BINARY_ASSERT_STRUCT(test, \
227 type, \
228 op_str, \
229 left_str, \
230 left_val, \
231 right_str, \
232 right_val) { \
233 .assert = KUNIT_INIT_ASSERT_STRUCT(test, \
234 type, \
235 kunit_binary_assert_format), \
236 .operation = op_str, \
237 .left_text = left_str, \
238 .left_value = left_val, \
239 .right_text = right_str, \
240 .right_value = right_val \
241}
242
243/**
244 * struct kunit_binary_ptr_assert - An expectation/assertion that compares two
245 * pointer values (for example, KUNIT_EXPECT_PTR_EQ(test, foo, bar)).
246 * @assert: The parent of this type.
247 * @operation: A string representation of the comparison operator (e.g. "==").
248 * @left_text: A string representation of the expression in the left slot.
249 * @left_value: The actual evaluated value of the expression in the left slot.
250 * @right_text: A string representation of the expression in the right slot.
251 * @right_value: The actual evaluated value of the expression in the right slot.
252 *
253 * Represents an expectation/assertion that compares two pointer values. For
254 * example, to expect that foo and bar point to the same thing, you can use the
255 * expectation KUNIT_EXPECT_PTR_EQ(test, foo, bar);
256 */
257struct kunit_binary_ptr_assert {
258 struct kunit_assert assert;
259 const char *operation;
260 const char *left_text;
261 const void *left_value;
262 const char *right_text;
263 const void *right_value;
264};
265
266void kunit_binary_ptr_assert_format(const struct kunit_assert *assert,
267 struct string_stream *stream);
268
269/**
270 * KUNIT_INIT_BINARY_PTR_ASSERT_STRUCT() - Initializes a
271 * &struct kunit_binary_ptr_assert.
272 * @test: The test case that this expectation/assertion is associated with.
273 * @type: The type (assertion or expectation) of this kunit_assert.
274 * @op_str: A string representation of the comparison operator (e.g. "==").
275 * @left_str: A string representation of the expression in the left slot.
276 * @left_val: The actual evaluated value of the expression in the left slot.
277 * @right_str: A string representation of the expression in the right slot.
278 * @right_val: The actual evaluated value of the expression in the right slot.
279 *
280 * Initializes a &struct kunit_binary_ptr_assert. Intended to be used in
281 * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros.
282 */
283#define KUNIT_INIT_BINARY_PTR_ASSERT_STRUCT(test, \
284 type, \
285 op_str, \
286 left_str, \
287 left_val, \
288 right_str, \
289 right_val) { \
290 .assert = KUNIT_INIT_ASSERT_STRUCT(test, \
291 type, \
292 kunit_binary_ptr_assert_format), \
293 .operation = op_str, \
294 .left_text = left_str, \
295 .left_value = left_val, \
296 .right_text = right_str, \
297 .right_value = right_val \
298}
299
300/**
301 * struct kunit_binary_str_assert - An expectation/assertion that compares two
302 * string values (for example, KUNIT_EXPECT_STREQ(test, foo, "bar")).
303 * @assert: The parent of this type.
304 * @operation: A string representation of the comparison operator (e.g. "==").
305 * @left_text: A string representation of the expression in the left slot.
306 * @left_value: The actual evaluated value of the expression in the left slot.
307 * @right_text: A string representation of the expression in the right slot.
308 * @right_value: The actual evaluated value of the expression in the right slot.
309 *
310 * Represents an expectation/assertion that compares two string values. For
311 * example, to expect that the string in foo is equal to "bar", you can use the
312 * expectation KUNIT_EXPECT_STREQ(test, foo, "bar");
313 */
314struct kunit_binary_str_assert {
315 struct kunit_assert assert;
316 const char *operation;
317 const char *left_text;
318 const char *left_value;
319 const char *right_text;
320 const char *right_value;
321};
322
323void kunit_binary_str_assert_format(const struct kunit_assert *assert,
324 struct string_stream *stream);
325
326/**
327 * KUNIT_INIT_BINARY_STR_ASSERT_STRUCT() - Initializes a
328 * &struct kunit_binary_str_assert.
329 * @test: The test case that this expectation/assertion is associated with.
330 * @type: The type (assertion or expectation) of this kunit_assert.
331 * @op_str: A string representation of the comparison operator (e.g. "==").
332 * @left_str: A string representation of the expression in the left slot.
333 * @left_val: The actual evaluated value of the expression in the left slot.
334 * @right_str: A string representation of the expression in the right slot.
335 * @right_val: The actual evaluated value of the expression in the right slot.
336 *
337 * Initializes a &struct kunit_binary_str_assert. Intended to be used in
338 * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros.
339 */
340#define KUNIT_INIT_BINARY_STR_ASSERT_STRUCT(test, \
341 type, \
342 op_str, \
343 left_str, \
344 left_val, \
345 right_str, \
346 right_val) { \
347 .assert = KUNIT_INIT_ASSERT_STRUCT(test, \
348 type, \
349 kunit_binary_str_assert_format), \
350 .operation = op_str, \
351 .left_text = left_str, \
352 .left_value = left_val, \
353 .right_text = right_str, \
354 .right_value = right_val \
355}
356
357#endif /* _KUNIT_ASSERT_H */