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Add some test-cases for gnc_numerics using the reciprocal denominator.

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Even though we don't explicitly ask for this representation, certain
   calculations (e.g. those involving GNC_HOW_DENOM_SIGFIGS in the loan    
   druid and soon in budgets) will return numbers using this representation.

   Unfortunately, these numbers aren't handled correctly by most of the
   gnc_numeric functions, like the ones for comparison, equality testing,
   arithmetic and conversion.


git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@13090 57a11ea4-9604-0410-9ed3-97b8803252fd
This commit is contained in:
Chris Shoemaker 2006-02-04 05:37:50 +00:00
parent 5631500dda
commit 85a99a1987
1 changed files with 103 additions and 8 deletions
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111
src/engine/test/test-numeric.c
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@ -541,33 +541,52 @@ check_mult_div (void)
gint64 v;
gnc_numeric c, d;
gnc_numeric amt_a, amt_tot, frac, val_tot, val_a;
gnc_numeric a, b;
gnc_numeric a = gnc_numeric_create(2, 6);
gnc_numeric b = gnc_numeric_create(1, 4);
a = gnc_numeric_create(-100, 100);
b = gnc_numeric_create(1, 1);
check_binary_op (gnc_numeric_create(-100, 100),
gnc_numeric_div(a, b, GNC_DENOM_AUTO, GNC_HOW_DENOM_EXACT),
a, b, "expected %s got %s = %s / %s div exact");
a = gnc_numeric_create(-100, 100);
b = gnc_numeric_create(-1, 1);
check_binary_op (gnc_numeric_create(100, 100),
gnc_numeric_div(a, b, GNC_DENOM_AUTO, GNC_HOW_DENOM_EXACT),
a, b, "expected %s got %s = %s / %s div exact");
a = gnc_numeric_create(-100, 100);
b = gnc_numeric_create(-1, 1);
check_binary_op (gnc_numeric_create(100, 100),
gnc_numeric_mul(a, b, GNC_DENOM_AUTO, GNC_HOW_DENOM_EXACT),
a, b, "expected %s got %s = %s * %s mult exact");
a = gnc_numeric_create(2, 6);
b = gnc_numeric_create(1, 4);
check_binary_op (gnc_numeric_create(2,24),
gnc_numeric_mul(a, b, GNC_DENOM_AUTO, GNC_HOW_DENOM_EXACT),
a, b, "expected %s got %s = %s * %s for mult exact");
a, b, "expected %s got %s = %s * %s for mult exact");
check_binary_op (gnc_numeric_create(1,12),
gnc_numeric_mul(a, b, GNC_DENOM_AUTO, GNC_HOW_DENOM_REDUCE),
a, b, "expected %s got %s = %s * %s for mult reduce");
a, b, "expected %s got %s = %s * %s for mult reduce");
check_binary_op (gnc_numeric_create(8,100),
gnc_numeric_mul(a, b, 100, GNC_HOW_RND_ROUND),
a, b, "expected %s got %s = %s * %s for mult 100th's");
a, b, "expected %s got %s = %s * %s for mult 100th's");
check_binary_op (gnc_numeric_create(8,6),
gnc_numeric_div(a, b, GNC_DENOM_AUTO, GNC_HOW_DENOM_EXACT),
a, b, "expected %s got %s = %s / %s for div exact");
a, b, "expected %s got %s = %s / %s for div exact");
check_binary_op (gnc_numeric_create(4,3),
gnc_numeric_div(a, b, GNC_DENOM_AUTO, GNC_HOW_DENOM_REDUCE),
a, b, "expected %s got %s = %s / %s for div reduce");
a, b, "expected %s got %s = %s / %s for div reduce");
check_binary_op (gnc_numeric_create(133,100),
gnc_numeric_div(a, b, 100, GNC_HOW_RND_ROUND),
a, b, "expected %s got %s = %s * %s for div 100th's");
a, b, "expected %s got %s = %s * %s for div 100th's");
#if CHECK_ERRORS_TOO
gnc_numeric c;
@ -742,6 +761,81 @@ check_mult_div (void)
frac, a, b,
"expected %s got %s = %s / %s for mult sigfigs");
}
static void
check_reciprocal(void)
{
gnc_numeric a, b, ans, val;
double flo;
val = gnc_numeric_create(-60,20);
check_unary_op (gnc_numeric_eq, gnc_numeric_create (-3, -1),
gnc_numeric_convert(val, GNC_DENOM_RECIPROCAL(1),
GNC_HOW_RND_NEVER),
val, "expected %s = %s = (%s as RECIP(1))");
a = gnc_numeric_create(200, 100);
b = gnc_numeric_create(300, 100);
/* 2 + 3 = 5 */
ans = gnc_numeric_add(a, b, GNC_DENOM_RECIPROCAL(1), GNC_HOW_RND_NEVER);
check_binary_op (gnc_numeric_create(5, -1),
ans, a, b, "expected %s got %s = %s + %s for recirocal");
/* 2 + 3 = 5 */
a = gnc_numeric_create(2, -1);
b = gnc_numeric_create(300, 100);
ans = gnc_numeric_add(a, b, GNC_DENOM_RECIPROCAL(1), GNC_HOW_RND_NEVER);
check_binary_op (gnc_numeric_create(5, -1),
ans, a, b, "expected %s got %s = %s + %s for recirocal");
/* check gnc_numeric_to_double */
flo = gnc_numeric_to_double(gnc_numeric_create(5, -1));
do_test ((5.0 == flo), "reciprocal conversion");
/* check gnc_numeric_compare */
a = gnc_numeric_create(2, 1);
b = gnc_numeric_create(2, -1);
do_test((0 == gnc_numeric_compare(a, b)), " 2 == 2 ");
a = gnc_numeric_create(2, 1);
b = gnc_numeric_create(3, -1);
do_test((-1 == gnc_numeric_compare(a, b)), " 2 < 3 ");
a = gnc_numeric_create(-2, 1);
b = gnc_numeric_create(2, -1);
do_test((-1 == gnc_numeric_compare(a, b)), " -2 < 2 ");
a = gnc_numeric_create(2, -1);
b = gnc_numeric_create(3, -1);
do_test((-1 == gnc_numeric_compare(a, b)), " 2 < 3 ");
/* check for equality */
a = gnc_numeric_create(2, 1);
b = gnc_numeric_create(2, -1);
do_test(gnc_numeric_equal(a, b), " 2 == 2 ");
/* check gnc_numeric_mul */
a = gnc_numeric_create(2, 1);
b = gnc_numeric_create(3, -1);
ans = gnc_numeric_mul(a, b, GNC_DENOM_RECIPROCAL(1), GNC_HOW_RND_NEVER);
check_binary_op (gnc_numeric_create(6, -1),
ans, a, b, "expected %s got %s = %s * %s for recirocal");
/* check gnc_numeric_div */
/* -60 / 20 = -3 */
a = gnc_numeric_create(-60, 1);
b = gnc_numeric_create(2, -10);
ans = gnc_numeric_div(a, b, GNC_DENOM_RECIPROCAL(1), GNC_HOW_RND_NEVER);
check_binary_op (gnc_numeric_create(-3, -1),
ans, a, b, "expected %s got %s = %s / %s for recirocal");
/* 60 / 20 = 3 */
a = gnc_numeric_create(60, 1);
b = gnc_numeric_create(2, -10);
ans = gnc_numeric_div(a, b, GNC_DENOM_RECIPROCAL(1), GNC_HOW_RND_NEVER);
check_binary_op (gnc_numeric_create(3, -1),
ans, a, b, "expected %s got %s = %s / %s for recirocal");
}
/* ======================================================= */
@ -757,6 +851,7 @@ run_test (void)
check_neg();
check_add_subtract();
check_mult_div ();
check_reciprocal();
}
int