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// SPDX-License-Identifier: GPL-2.0-only
/* Unit tests for IIO formatting functions
*
* Copyright (c) 2020 Lars-Peter Clausen <lars@metafoo.de>
*/
#include <kunit/test.h>
#include <linux/iio/iio.h>
#define IIO_TEST_FORMAT_EXPECT_EQ(_test, _buf, _ret, _val) do { \
KUNIT_EXPECT_EQ(_test, (int)strlen(_buf), _ret); \
KUNIT_EXPECT_STREQ(_test, (_buf), (_val)); \
} while (0)
static void iio_test_iio_format_value_integer(struct kunit *test)
{
char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
int val;
int ret;
val = 42;
ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "42\n");
val = -23;
ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-23\n");
val = 0;
ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0\n");
val = INT_MAX;
ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "2147483647\n");
val = INT_MIN;
ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-2147483648\n");
}
static void iio_test_iio_format_value_fixedpoint(struct kunit *test)
{
char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
int values[2];
int ret;
/* positive >= 1 */
values[0] = 1;
values[1] = 10;
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000010\n");
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000010 dB\n");
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000000010\n");
/* positive < 1 */
values[0] = 0;
values[1] = 12;
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000012\n");
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000012 dB\n");
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000012\n");
/* negative <= -1 */
values[0] = -1;
values[1] = 10;
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000010\n");
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000010 dB\n");
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000000010\n");
/* negative > -1 */
values[0] = 0;
values[1] = -123;
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000123\n");
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000123 dB\n");
ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000000123\n");
}
static void iio_test_iio_format_value_fractional(struct kunit *test)
{
char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
int values[2];
int ret;
/* positive < 1 */
values[0] = 1;
values[1] = 10;
ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.100000000\n");
/* positive >= 1 */
values[0] = 100;
values[1] = 3;
ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "33.333333333\n");
/* negative > -1 */
values[0] = -1;
values[1] = 1000000000;
ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000000001\n");
/* negative <= -1 */
values[0] = -200;
values[1] = 3;
ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-66.666666666\n");
/* Zero */
values[0] = 0;
values[1] = -10;
ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000000\n");
}
static void iio_test_iio_format_value_fractional_log2(struct kunit *test)
{
char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
int values[2];
int ret;
/* positive < 1 */
values[0] = 123;
values[1] = 10;
ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.120117187\n");
/* positive >= 1 */
values[0] = 1234567;
values[1] = 10;
ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1205.631835937\n");
/* negative > -1 */
values[0] = -123;
values[1] = 10;
ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.120117187\n");
/* negative <= -1 */
values[0] = -1234567;
values[1] = 10;
ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1205.631835937\n");
/* Zero */
values[0] = 0;
values[1] = 10;
ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000000\n");
}
static void iio_test_iio_format_value_multiple(struct kunit *test)
{
char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
int values[] = {1, -2, 3, -4, 5};
int ret;
ret = iio_format_value(buf, IIO_VAL_INT_MULTIPLE,
ARRAY_SIZE(values), values);
IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1 -2 3 -4 5 \n");
}
static struct kunit_case iio_format_test_cases[] = {
KUNIT_CASE(iio_test_iio_format_value_integer),
KUNIT_CASE(iio_test_iio_format_value_fixedpoint),
KUNIT_CASE(iio_test_iio_format_value_fractional),
KUNIT_CASE(iio_test_iio_format_value_fractional_log2),
KUNIT_CASE(iio_test_iio_format_value_multiple),
{}
};
static struct kunit_suite iio_format_test_suite = {
.name = "iio-format",
.test_cases = iio_format_test_cases,
};
kunit_test_suite(iio_format_test_suite);
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