summaryrefslogtreecommitdiff
path: root/lib/kunit/assert.c
blob: f5b50babe38d46586bd9057c4386c8f02ec0bb23 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
// SPDX-License-Identifier: GPL-2.0
/*
 * Assertion and expectation serialization API.
 *
 * Copyright (C) 2019, Google LLC.
 * Author: Brendan Higgins <brendanhiggins@google.com>
 */
#include <kunit/assert.h>
#include <kunit/test.h>

#include "string-stream.h"

void kunit_assert_prologue(const struct kunit_loc *loc,
			   enum kunit_assert_type type,
			      struct string_stream *stream)
{
	const char *expect_or_assert = NULL;

	switch (type) {
	case KUNIT_EXPECTATION:
		expect_or_assert = "EXPECTATION";
		break;
	case KUNIT_ASSERTION:
		expect_or_assert = "ASSERTION";
		break;
	}

	string_stream_add(stream, "%s FAILED at %s:%d\n",
			  expect_or_assert, loc->file, loc->line);
}
EXPORT_SYMBOL_GPL(kunit_assert_prologue);

static void kunit_assert_print_msg(const struct va_format *message,
				   struct string_stream *stream)
{
	if (message->fmt)
		string_stream_add(stream, "\n%pV", message);
}

void kunit_fail_assert_format(const struct kunit_assert *assert,
			      const struct va_format *message,
			      struct string_stream *stream)
{
	string_stream_add(stream, "%pV", message);
}
EXPORT_SYMBOL_GPL(kunit_fail_assert_format);

void kunit_unary_assert_format(const struct kunit_assert *assert,
			       const struct va_format *message,
			       struct string_stream *stream)
{
	struct kunit_unary_assert *unary_assert;

	unary_assert = container_of(assert, struct kunit_unary_assert, assert);

	if (unary_assert->expected_true)
		string_stream_add(stream,
				  KUNIT_SUBTEST_INDENT "Expected %s to be true, but is false\n",
				  unary_assert->condition);
	else
		string_stream_add(stream,
				  KUNIT_SUBTEST_INDENT "Expected %s to be false, but is true\n",
				  unary_assert->condition);
	kunit_assert_print_msg(message, stream);
}
EXPORT_SYMBOL_GPL(kunit_unary_assert_format);

void kunit_ptr_not_err_assert_format(const struct kunit_assert *assert,
				     const struct va_format *message,
				     struct string_stream *stream)
{
	struct kunit_ptr_not_err_assert *ptr_assert;

	ptr_assert = container_of(assert, struct kunit_ptr_not_err_assert,
				  assert);

	if (!ptr_assert->value) {
		string_stream_add(stream,
				  KUNIT_SUBTEST_INDENT "Expected %s is not null, but is\n",
				  ptr_assert->text);
	} else if (IS_ERR(ptr_assert->value)) {
		string_stream_add(stream,
				  KUNIT_SUBTEST_INDENT "Expected %s is not error, but is: %ld\n",
				  ptr_assert->text,
				  PTR_ERR(ptr_assert->value));
	}
	kunit_assert_print_msg(message, stream);
}
EXPORT_SYMBOL_GPL(kunit_ptr_not_err_assert_format);

/* Checks if `text` is a literal representing `value`, e.g. "5" and 5 */
static bool is_literal(struct kunit *test, const char *text, long long value,
		       gfp_t gfp)
{
	char *buffer;
	int len;
	bool ret;

	len = snprintf(NULL, 0, "%lld", value);
	if (strlen(text) != len)
		return false;

	buffer = kunit_kmalloc(test, len+1, gfp);
	if (!buffer)
		return false;

	snprintf(buffer, len+1, "%lld", value);
	ret = strncmp(buffer, text, len) == 0;

	kunit_kfree(test, buffer);
	return ret;
}

void kunit_binary_assert_format(const struct kunit_assert *assert,
				const struct va_format *message,
				struct string_stream *stream)
{
	struct kunit_binary_assert *binary_assert;

	binary_assert = container_of(assert, struct kunit_binary_assert,
				     assert);

	string_stream_add(stream,
			  KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
			  binary_assert->text->left_text,
			  binary_assert->text->operation,
			  binary_assert->text->right_text);
	if (!is_literal(stream->test, binary_assert->text->left_text,
			binary_assert->left_value, stream->gfp))
		string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %lld (0x%llx)\n",
				  binary_assert->text->left_text,
				  binary_assert->left_value,
				  binary_assert->left_value);
	if (!is_literal(stream->test, binary_assert->text->right_text,
			binary_assert->right_value, stream->gfp))
		string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %lld (0x%llx)",
				  binary_assert->text->right_text,
				  binary_assert->right_value,
				  binary_assert->right_value);
	kunit_assert_print_msg(message, stream);
}
EXPORT_SYMBOL_GPL(kunit_binary_assert_format);

void kunit_binary_ptr_assert_format(const struct kunit_assert *assert,
				    const struct va_format *message,
				    struct string_stream *stream)
{
	struct kunit_binary_ptr_assert *binary_assert;

	binary_assert = container_of(assert, struct kunit_binary_ptr_assert,
				     assert);

	string_stream_add(stream,
			  KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
			  binary_assert->text->left_text,
			  binary_assert->text->operation,
			  binary_assert->text->right_text);
	string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %px\n",
			  binary_assert->text->left_text,
			  binary_assert->left_value);
	string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %px",
			  binary_assert->text->right_text,
			  binary_assert->right_value);
	kunit_assert_print_msg(message, stream);
}
EXPORT_SYMBOL_GPL(kunit_binary_ptr_assert_format);

/* Checks if KUNIT_EXPECT_STREQ() args were string literals.
 * Note: `text` will have ""s where as `value` will not.
 */
static bool is_str_literal(const char *text, const char *value)
{
	int len;

	len = strlen(text);
	if (len < 2)
		return false;
	if (text[0] != '\"' || text[len - 1] != '\"')
		return false;

	return strncmp(text + 1, value, len - 2) == 0;
}

void kunit_binary_str_assert_format(const struct kunit_assert *assert,
				    const struct va_format *message,
				    struct string_stream *stream)
{
	struct kunit_binary_str_assert *binary_assert;

	binary_assert = container_of(assert, struct kunit_binary_str_assert,
				     assert);

	string_stream_add(stream,
			  KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
			  binary_assert->text->left_text,
			  binary_assert->text->operation,
			  binary_assert->text->right_text);
	if (!is_str_literal(binary_assert->text->left_text, binary_assert->left_value))
		string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == \"%s\"\n",
				  binary_assert->text->left_text,
				  binary_assert->left_value);
	if (!is_str_literal(binary_assert->text->right_text, binary_assert->right_value))
		string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == \"%s\"",
				  binary_assert->text->right_text,
				  binary_assert->right_value);
	kunit_assert_print_msg(message, stream);
}
EXPORT_SYMBOL_GPL(kunit_binary_str_assert_format);

/* Adds a hexdump of a buffer to a string_stream comparing it with
 * a second buffer. The different bytes are marked with <>.
 */
static void kunit_assert_hexdump(struct string_stream *stream,
				 const void *buf,
				 const void *compared_buf,
				 const size_t len)
{
	size_t i;
	const u8 *buf1 = buf;
	const u8 *buf2 = compared_buf;

	string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT);

	for (i = 0; i < len; ++i) {
		if (!(i % 16) && i)
			string_stream_add(stream, "\n" KUNIT_SUBSUBTEST_INDENT);

		if (buf1[i] != buf2[i])
			string_stream_add(stream, "<%02x>", buf1[i]);
		else
			string_stream_add(stream, " %02x ", buf1[i]);
	}
}

void kunit_mem_assert_format(const struct kunit_assert *assert,
			     const struct va_format *message,
			     struct string_stream *stream)
{
	struct kunit_mem_assert *mem_assert;

	mem_assert = container_of(assert, struct kunit_mem_assert,
				  assert);

	string_stream_add(stream,
			  KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
			  mem_assert->text->left_text,
			  mem_assert->text->operation,
			  mem_assert->text->right_text);

	string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
			  mem_assert->text->left_text);
	kunit_assert_hexdump(stream, mem_assert->left_value,
			     mem_assert->right_value, mem_assert->size);

	string_stream_add(stream, "\n");

	string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
			  mem_assert->text->right_text);
	kunit_assert_hexdump(stream, mem_assert->right_value,
			     mem_assert->left_value, mem_assert->size);

	kunit_assert_print_msg(message, stream);
}
EXPORT_SYMBOL_GPL(kunit_mem_assert_format);