1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Unit tests for IIO formatting functions
3 *
4 * Copyright (c) 2020 Lars-Peter Clausen <lars@metafoo.de>
5 */
6
7 #include <kunit/test.h>
8 #include <linux/iio/iio.h>
9
10 #define IIO_TEST_FORMAT_EXPECT_EQ(_test, _buf, _ret, _val) do { \
11 KUNIT_EXPECT_EQ(_test, strlen(_buf), _ret); \
12 KUNIT_EXPECT_STREQ(_test, (_buf), (_val)); \
13 } while (0)
14
iio_test_iio_format_value_integer(struct kunit * test)15 static void iio_test_iio_format_value_integer(struct kunit *test)
16 {
17 char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
18 int val;
19 int ret;
20
21 val = 42;
22 ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
23 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "42\n");
24
25 val = -23;
26 ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
27 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-23\n");
28
29 val = 0;
30 ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
31 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0\n");
32
33 val = INT_MAX;
34 ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
35 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "2147483647\n");
36
37 val = INT_MIN;
38 ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
39 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-2147483648\n");
40 }
41
iio_test_iio_format_value_fixedpoint(struct kunit * test)42 static void iio_test_iio_format_value_fixedpoint(struct kunit *test)
43 {
44 char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
45 int values[2];
46 int ret;
47
48 /* positive >= 1 */
49 values[0] = 1;
50 values[1] = 10;
51
52 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
53 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000010\n");
54
55 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
56 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000010 dB\n");
57
58 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
59 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000000010\n");
60
61 /* positive < 1 */
62 values[0] = 0;
63 values[1] = 12;
64
65 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
66 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000012\n");
67
68 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
69 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000012 dB\n");
70
71 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
72 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000012\n");
73
74 /* negative <= -1 */
75 values[0] = -1;
76 values[1] = 10;
77
78 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
79 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000010\n");
80
81 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
82 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000010 dB\n");
83
84 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
85 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000000010\n");
86
87 /* negative > -1 */
88 values[0] = 0;
89 values[1] = -123;
90 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
91 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000123\n");
92
93 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
94 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000123 dB\n");
95
96 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
97 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000000123\n");
98 }
99
iio_test_iio_format_value_fractional(struct kunit * test)100 static void iio_test_iio_format_value_fractional(struct kunit *test)
101 {
102 char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
103 int values[2];
104 int ret;
105
106 /* positive < 1 */
107 values[0] = 1;
108 values[1] = 10;
109 ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
110 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.100000000\n");
111
112 /* positive >= 1 */
113 values[0] = 100;
114 values[1] = 3;
115 ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
116 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "33.333333333\n");
117
118 /* negative > -1 */
119 values[0] = -1;
120 values[1] = 1000000000;
121 ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
122 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000000001\n");
123
124 /* negative <= -1 */
125 values[0] = -200;
126 values[1] = 3;
127 ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
128 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-66.666666666\n");
129
130 /* Zero */
131 values[0] = 0;
132 values[1] = -10;
133 ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
134 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000000\n");
135 }
136
iio_test_iio_format_value_fractional_log2(struct kunit * test)137 static void iio_test_iio_format_value_fractional_log2(struct kunit *test)
138 {
139 char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
140 int values[2];
141 int ret;
142
143 /* positive < 1 */
144 values[0] = 123;
145 values[1] = 10;
146 ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
147 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.120117187\n");
148
149 /* positive >= 1 */
150 values[0] = 1234567;
151 values[1] = 10;
152 ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
153 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1205.631835937\n");
154
155 /* negative > -1 */
156 values[0] = -123;
157 values[1] = 10;
158 ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
159 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.120117187\n");
160
161 /* negative <= -1 */
162 values[0] = -1234567;
163 values[1] = 10;
164 ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
165 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1205.631835937\n");
166
167 /* Zero */
168 values[0] = 0;
169 values[1] = 10;
170 ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
171 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000000\n");
172 }
173
iio_test_iio_format_value_multiple(struct kunit * test)174 static void iio_test_iio_format_value_multiple(struct kunit *test)
175 {
176 char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
177 int values[] = {1, -2, 3, -4, 5};
178 int ret;
179
180 ret = iio_format_value(buf, IIO_VAL_INT_MULTIPLE,
181 ARRAY_SIZE(values), values);
182 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1 -2 3 -4 5 \n");
183 }
184
185 static struct kunit_case iio_format_test_cases[] = {
186 KUNIT_CASE(iio_test_iio_format_value_integer),
187 KUNIT_CASE(iio_test_iio_format_value_fixedpoint),
188 KUNIT_CASE(iio_test_iio_format_value_fractional),
189 KUNIT_CASE(iio_test_iio_format_value_fractional_log2),
190 KUNIT_CASE(iio_test_iio_format_value_multiple),
191 {}
192 };
193
194 static struct kunit_suite iio_format_test_suite = {
195 .name = "iio-format",
196 .test_cases = iio_format_test_cases,
197 };
198 kunit_test_suite(iio_format_test_suite);
199