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exchange/src/util/test_amount.c

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/*
This file is part of TALER
(C) 2015 GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file util/test_amount.c
* @brief Tests for amount logic
* @author Christian Grothoff <christian@grothoff.org>
*/
#include "platform.h"
#include "taler_util.h"
#include "taler_amount_lib.h"
int
main (int argc,
const char *const argv[])
{
struct TALER_Amount a1;
struct TALER_Amount a2;
struct TALER_Amount a3;
char *c;
GNUNET_log_setup ("test-amout",
"WARNING",
NULL);
/* test invalid conversions */
GNUNET_log_skip (6, GNUNET_NO);
/* non-numeric */
GNUNET_assert (GNUNET_SYSERR ==
TALER_string_to_amount ("EUR:4a",
&a1));
/* non-numeric */
GNUNET_assert (GNUNET_SYSERR ==
TALER_string_to_amount ("EUR:4.4a",
&a1));
/* non-numeric */
GNUNET_assert (GNUNET_SYSERR ==
TALER_string_to_amount ("EUR:4.a4",
&a1));
/* no currency */
GNUNET_assert (GNUNET_SYSERR ==
TALER_string_to_amount (":4.a4",
&a1));
/* precision too high */
GNUNET_assert (GNUNET_SYSERR ==
TALER_string_to_amount ("EUR:4.123456789",
&a1));
/* value too big */
GNUNET_assert (GNUNET_SYSERR ==
TALER_string_to_amount (
"EUR:1234567890123456789012345678901234567890123456789012345678901234567890",
&a1));
GNUNET_log_skip (0, GNUNET_YES);
/* test conversion without fraction */
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount ("EUR:4",
&a1));
GNUNET_assert (0 == strcasecmp ("EUR",
a1.currency));
GNUNET_assert (4 == a1.value);
GNUNET_assert (0 == a1.fraction);
/* test conversion with leading zero in fraction */
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount ("eur:0.02",
&a2));
GNUNET_assert (0 == strcasecmp ("eur",
a2.currency));
GNUNET_assert (0 == a2.value);
GNUNET_assert (TALER_AMOUNT_FRAC_BASE / 100 * 2 == a2.fraction);
c = TALER_amount_to_string (&a2);
GNUNET_assert (0 == strcmp ("eur:0.02",
c));
GNUNET_free (c);
/* test conversion with leading space and with fraction */
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount (" eur:4.12",
&a2));
GNUNET_assert (0 == strcasecmp ("eur",
a2.currency));
GNUNET_assert (4 == a2.value);
GNUNET_assert (TALER_AMOUNT_FRAC_BASE / 100 * 12 == a2.fraction);
/* test use of local currency */
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount (" *LOCAL:4444.1000",
&a3));
GNUNET_assert (0 == strcasecmp ("*LOCAL",
a3.currency));
GNUNET_assert (4444 == a3.value);
GNUNET_assert (TALER_AMOUNT_FRAC_BASE / 10 == a3.fraction);
/* test CMP with equal and unequal currencies */
GNUNET_assert (GNUNET_NO ==
TALER_amount_cmp_currency (&a1,
&a3));
GNUNET_assert (GNUNET_YES ==
TALER_amount_cmp_currency (&a1,
&a2));
/* test subtraction failure (currency missmatch) */
GNUNET_assert (GNUNET_SYSERR ==
TALER_amount_subtract (&a3,
&a3,
&a2));
GNUNET_assert (GNUNET_SYSERR ==
TALER_amount_normalize (&a3));
/* test subtraction failure (negative result) */
GNUNET_assert (GNUNET_SYSERR ==
TALER_amount_subtract (&a3,
&a1,
&a2));
GNUNET_assert (GNUNET_SYSERR ==
TALER_amount_normalize (&a3));
/* test subtraction success cases */
GNUNET_assert (GNUNET_YES ==
TALER_amount_subtract (&a3,
&a2,
&a1));
GNUNET_assert (GNUNET_NO ==
TALER_amount_subtract (&a3,
&a1,
&a1));
GNUNET_assert (0 == a3.value);
GNUNET_assert (0 == a3.fraction);
GNUNET_assert (GNUNET_NO ==
TALER_amount_normalize (&a3));
/* test addition success */
GNUNET_assert (GNUNET_OK ==
TALER_amount_add (&a3,
&a3,
&a2));
GNUNET_assert (GNUNET_NO ==
TALER_amount_normalize (&a3));
/* test normalization */
a3.fraction = 2 * TALER_AMOUNT_FRAC_BASE;
a3.value = 4;
GNUNET_assert (GNUNET_YES ==
TALER_amount_normalize (&a3));
/* test conversion to string */
c = TALER_amount_to_string (&a3);
GNUNET_assert (0 == strcmp ("EUR:6",
c));
GNUNET_free (c);
/* test normalization with fraction overflow */
a3.fraction = 2 * TALER_AMOUNT_FRAC_BASE + 1;
a3.value = 4;
GNUNET_assert (GNUNET_YES ==
TALER_amount_normalize (&a3));
c = TALER_amount_to_string (&a3);
GNUNET_assert (0 == strcmp ("EUR:6.00000001",
c));
GNUNET_free (c);
/* test normalization with overflow */
a3.fraction = 2 * TALER_AMOUNT_FRAC_BASE + 1;
a3.value = UINT64_MAX - 1;
GNUNET_assert (GNUNET_SYSERR ==
TALER_amount_normalize (&a3));
c = TALER_amount_to_string (&a3);
GNUNET_assert (NULL == c);
/* test addition with overflow */
a1.fraction = TALER_AMOUNT_FRAC_BASE - 1;
a1.value = UINT64_MAX - 5;
a2.fraction = 2;
a2.value = 5;
GNUNET_assert (GNUNET_SYSERR ==
TALER_amount_add (&a3, &a1, &a2));
/* test addition with underflow on fraction */
a1.fraction = 1;
a1.value = UINT64_MAX;
a2.fraction = 2;
a2.value = 0;
GNUNET_assert (GNUNET_OK ==
TALER_amount_subtract (&a3, &a1, &a2));
GNUNET_assert (UINT64_MAX - 1 == a3.value);
GNUNET_assert (TALER_AMOUNT_FRAC_BASE - 1 == a3.fraction);
/* test division */
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount ("EUR:3.33",
&a1));
TALER_amount_divide (&a2,
&a1,
1);
GNUNET_assert (0 == strcasecmp ("EUR",
a2.currency));
GNUNET_assert (3 == a2.value);
GNUNET_assert (TALER_AMOUNT_FRAC_BASE / 100 * 33 == a2.fraction);
TALER_amount_divide (&a2,
&a1,
3);
GNUNET_assert (0 == strcasecmp ("EUR",
a2.currency));
GNUNET_assert (1 == a2.value);
GNUNET_assert (TALER_AMOUNT_FRAC_BASE / 100 * 11 == a2.fraction);
TALER_amount_divide (&a2,
&a1,
2);
GNUNET_assert (0 == strcasecmp ("EUR",
a2.currency));
GNUNET_assert (1 == a2.value);
GNUNET_assert (TALER_AMOUNT_FRAC_BASE / 1000 * 665 == a2.fraction);
TALER_amount_divide (&a2,
&a1,
TALER_AMOUNT_FRAC_BASE * 2);
GNUNET_assert (0 == strcasecmp ("EUR",
a2.currency));
GNUNET_assert (0 == a2.value);
GNUNET_assert (1 == a2.fraction);
/* test rounding #1 */
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount ("EUR:4.001",
&a1));
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount ("EUR:4",
&a2));
GNUNET_assert (GNUNET_OK == TALER_amount_round_down (&a1, 2));
GNUNET_assert (GNUNET_NO == TALER_amount_round_down (&a1, 2));
GNUNET_assert (0 == TALER_amount_cmp (&a1, &a2));
/* test rounding #2 */
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount ("EUR:4.001",
&a1));
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount ("EUR:4.001",
&a2));
GNUNET_assert (GNUNET_NO == TALER_amount_round_down (&a1, 3));
GNUNET_assert (0 == TALER_amount_cmp (&a1, &a2));
return 0;
}
/* end of test_amount.c */
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