projects/linux·blob v6.7 · refs

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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 <[email protected]>
7 */
8#include <kunit/assert.h>
9#include <kunit/test.h>
10
11#include "string-stream.h"
12
13void kunit_assert_prologue(const struct kunit_loc *loc,
14 enum kunit_assert_type type,
15 struct string_stream *stream)
16{
17 const char *expect_or_assert = NULL;
18
19 switch (type) {
20 case KUNIT_EXPECTATION:
21 expect_or_assert = "EXPECTATION";
22 break;
23 case KUNIT_ASSERTION:
24 expect_or_assert = "ASSERTION";
25 break;
26 }
27
28 string_stream_add(stream, "%s FAILED at %s:%d\n",
29 expect_or_assert, loc->file, loc->line);
30}
31EXPORT_SYMBOL_GPL(kunit_assert_prologue);
32
33static void kunit_assert_print_msg(const struct va_format *message,
34 struct string_stream *stream)
35{
36 if (message->fmt)
37 string_stream_add(stream, "\n%pV", message);
38}
39
40void kunit_fail_assert_format(const struct kunit_assert *assert,
41 const struct va_format *message,
42 struct string_stream *stream)
43{
44 string_stream_add(stream, "%pV", message);
45}
46EXPORT_SYMBOL_GPL(kunit_fail_assert_format);
47
48void kunit_unary_assert_format(const struct kunit_assert *assert,
49 const struct va_format *message,
50 struct string_stream *stream)
51{
52 struct kunit_unary_assert *unary_assert;
53
54 unary_assert = container_of(assert, struct kunit_unary_assert, assert);
55
56 if (unary_assert->expected_true)
57 string_stream_add(stream,
58 KUNIT_SUBTEST_INDENT "Expected %s to be true, but is false\n",
59 unary_assert->condition);
60 else
61 string_stream_add(stream,
62 KUNIT_SUBTEST_INDENT "Expected %s to be false, but is true\n",
63 unary_assert->condition);
64 kunit_assert_print_msg(message, stream);
65}
66EXPORT_SYMBOL_GPL(kunit_unary_assert_format);
67
68void kunit_ptr_not_err_assert_format(const struct kunit_assert *assert,
69 const struct va_format *message,
70 struct string_stream *stream)
71{
72 struct kunit_ptr_not_err_assert *ptr_assert;
73
74 ptr_assert = container_of(assert, struct kunit_ptr_not_err_assert,
75 assert);
76
77 if (!ptr_assert->value) {
78 string_stream_add(stream,
79 KUNIT_SUBTEST_INDENT "Expected %s is not null, but is\n",
80 ptr_assert->text);
81 } else if (IS_ERR(ptr_assert->value)) {
82 string_stream_add(stream,
83 KUNIT_SUBTEST_INDENT "Expected %s is not error, but is: %ld\n",
84 ptr_assert->text,
85 PTR_ERR(ptr_assert->value));
86 }
87 kunit_assert_print_msg(message, stream);
88}
89EXPORT_SYMBOL_GPL(kunit_ptr_not_err_assert_format);
90
91/* Checks if `text` is a literal representing `value`, e.g. "5" and 5 */
92static bool is_literal(const char *text, long long value)
93{
94 char *buffer;
95 int len;
96 bool ret;
97
98 len = snprintf(NULL, 0, "%lld", value);
99 if (strlen(text) != len)
100 return false;
101
102 buffer = kmalloc(len+1, GFP_KERNEL);
103 if (!buffer)
104 return false;
105
106 snprintf(buffer, len+1, "%lld", value);
107 ret = strncmp(buffer, text, len) == 0;
108
109 kfree(buffer);
110
111 return ret;
112}
113
114void kunit_binary_assert_format(const struct kunit_assert *assert,
115 const struct va_format *message,
116 struct string_stream *stream)
117{
118 struct kunit_binary_assert *binary_assert;
119
120 binary_assert = container_of(assert, struct kunit_binary_assert,
121 assert);
122
123 string_stream_add(stream,
124 KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
125 binary_assert->text->left_text,
126 binary_assert->text->operation,
127 binary_assert->text->right_text);
128 if (!is_literal(binary_assert->text->left_text, binary_assert->left_value))
129 string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %lld (0x%llx)\n",
130 binary_assert->text->left_text,
131 binary_assert->left_value,
132 binary_assert->left_value);
133 if (!is_literal(binary_assert->text->right_text, binary_assert->right_value))
134 string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %lld (0x%llx)",
135 binary_assert->text->right_text,
136 binary_assert->right_value,
137 binary_assert->right_value);
138 kunit_assert_print_msg(message, stream);
139}
140EXPORT_SYMBOL_GPL(kunit_binary_assert_format);
141
142void kunit_binary_ptr_assert_format(const struct kunit_assert *assert,
143 const struct va_format *message,
144 struct string_stream *stream)
145{
146 struct kunit_binary_ptr_assert *binary_assert;
147
148 binary_assert = container_of(assert, struct kunit_binary_ptr_assert,
149 assert);
150
151 string_stream_add(stream,
152 KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
153 binary_assert->text->left_text,
154 binary_assert->text->operation,
155 binary_assert->text->right_text);
156 string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %px\n",
157 binary_assert->text->left_text,
158 binary_assert->left_value);
159 string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %px",
160 binary_assert->text->right_text,
161 binary_assert->right_value);
162 kunit_assert_print_msg(message, stream);
163}
164EXPORT_SYMBOL_GPL(kunit_binary_ptr_assert_format);
165
166/* Checks if KUNIT_EXPECT_STREQ() args were string literals.
167 * Note: `text` will have ""s where as `value` will not.
168 */
169static bool is_str_literal(const char *text, const char *value)
170{
171 int len;
172
173 len = strlen(text);
174 if (len < 2)
175 return false;
176 if (text[0] != '\"' || text[len - 1] != '\"')
177 return false;
178
179 return strncmp(text + 1, value, len - 2) == 0;
180}
181
182void kunit_binary_str_assert_format(const struct kunit_assert *assert,
183 const struct va_format *message,
184 struct string_stream *stream)
185{
186 struct kunit_binary_str_assert *binary_assert;
187
188 binary_assert = container_of(assert, struct kunit_binary_str_assert,
189 assert);
190
191 string_stream_add(stream,
192 KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
193 binary_assert->text->left_text,
194 binary_assert->text->operation,
195 binary_assert->text->right_text);
196 if (!is_str_literal(binary_assert->text->left_text, binary_assert->left_value))
197 string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == \"%s\"\n",
198 binary_assert->text->left_text,
199 binary_assert->left_value);
200 if (!is_str_literal(binary_assert->text->right_text, binary_assert->right_value))
201 string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == \"%s\"",
202 binary_assert->text->right_text,
203 binary_assert->right_value);
204 kunit_assert_print_msg(message, stream);
205}
206EXPORT_SYMBOL_GPL(kunit_binary_str_assert_format);
207
208/* Adds a hexdump of a buffer to a string_stream comparing it with
209 * a second buffer. The different bytes are marked with <>.
210 */
211static void kunit_assert_hexdump(struct string_stream *stream,
212 const void *buf,
213 const void *compared_buf,
214 const size_t len)
215{
216 size_t i;
217 const u8 *buf1 = buf;
218 const u8 *buf2 = compared_buf;
219
220 string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT);
221
222 for (i = 0; i < len; ++i) {
223 if (!(i % 16) && i)
224 string_stream_add(stream, "\n" KUNIT_SUBSUBTEST_INDENT);
225
226 if (buf1[i] != buf2[i])
227 string_stream_add(stream, "<%02x>", buf1[i]);
228 else
229 string_stream_add(stream, " %02x ", buf1[i]);
230 }
231}
232
233void kunit_mem_assert_format(const struct kunit_assert *assert,
234 const struct va_format *message,
235 struct string_stream *stream)
236{
237 struct kunit_mem_assert *mem_assert;
238
239 mem_assert = container_of(assert, struct kunit_mem_assert,
240 assert);
241
242 if (!mem_assert->left_value) {
243 string_stream_add(stream,
244 KUNIT_SUBTEST_INDENT "Expected %s is not null, but is\n",
245 mem_assert->text->left_text);
246 } else if (!mem_assert->right_value) {
247 string_stream_add(stream,
248 KUNIT_SUBTEST_INDENT "Expected %s is not null, but is\n",
249 mem_assert->text->right_text);
250 } else {
251 string_stream_add(stream,
252 KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
253 mem_assert->text->left_text,
254 mem_assert->text->operation,
255 mem_assert->text->right_text);
256
257 string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
258 mem_assert->text->left_text);
259 kunit_assert_hexdump(stream, mem_assert->left_value,
260 mem_assert->right_value, mem_assert->size);
261
262 string_stream_add(stream, "\n");
263
264 string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
265 mem_assert->text->right_text);
266 kunit_assert_hexdump(stream, mem_assert->right_value,
267 mem_assert->left_value, mem_assert->size);
268
269 kunit_assert_print_msg(message, stream);
270 }
271}
272EXPORT_SYMBOL_GPL(kunit_mem_assert_format);