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litest: floating point comparison macros

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Adds the macros ck_assert_double_{eq,ne,lt,gt,le,ge} to compare double
values using a fixed tolerance value. The tolerance value is
picked based on the range of values to be expected by the libinput API.

Signed-off-by: Andreas Pokorny <andreas.pokorny@canonical.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Andreas Pokorny 2015-06-22 12:48:07 +02:00 • committed by Peter Hutterer
parent 2f8703620e
commit 1309718c00
2 changed files with 116 additions and 0 deletions
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66
test/litest-selftest.c
View file

@ -289,6 +289,61 @@ START_TEST(litest_ptr_notnull_trigger_NULL)
}
END_TEST
START_TEST(ck_double_eq_and_ne)
{
ck_assert_double_eq(0.4,0.4);
ck_assert_double_eq(0.4,0.4 + 1E-6);
ck_assert_double_ne(0.4,0.4 + 1E-3);
}
END_TEST
START_TEST(ck_double_lt_gt)
{
ck_assert_double_lt(12.0,13.0);
ck_assert_double_gt(15.4,13.0);
ck_assert_double_le(12.0,12.0);
ck_assert_double_le(12.0,20.0);
ck_assert_double_ge(12.0,12.0);
ck_assert_double_ge(20.0,12.0);
}
END_TEST
START_TEST(ck_double_eq_fails)
{
ck_assert_double_eq(0.41,0.4);
}
END_TEST
START_TEST(ck_double_ne_fails)
{
ck_assert_double_ne(0.4 + 1E-7,0.4);
}
END_TEST
START_TEST(ck_double_lt_fails)
{
ck_assert_double_lt(6,5);
}
END_TEST
START_TEST(ck_double_gt_fails)
{
ck_assert_double_gt(5,6);
}
END_TEST
START_TEST(ck_double_le_fails)
{
ck_assert_double_le(6,5);
}
END_TEST
START_TEST(ck_double_ge_fails)
{
ck_assert_double_ge(5,6);
}
END_TEST
static Suite *
litest_assert_macros_suite(void)
{
@ -342,6 +397,17 @@ litest_assert_macros_suite(void)
tcase_add_test(tc, litest_ptr_notnull_notrigger);
suite_add_tcase(s, tc);
tc = tcase_create("double comparison ");
tcase_add_test(tc, ck_double_eq_and_ne);
tcase_add_test(tc, ck_double_lt_gt);
tcase_add_exit_test(tc, ck_double_eq_fails, 1);
tcase_add_exit_test(tc, ck_double_ne_fails, 1);
tcase_add_exit_test(tc, ck_double_lt_fails, 1);
tcase_add_exit_test(tc, ck_double_gt_fails, 1);
tcase_add_exit_test(tc, ck_double_le_fails, 1);
tcase_add_exit_test(tc, ck_double_ge_fails, 1);
suite_add_tcase(s, tc);
return s;
}

50
test/litest.h
View file

@ -458,4 +458,54 @@ litest_disable_tap(struct libinput_device *device)
litest_assert_int_eq(status, expected);
}
#define CK_DOUBLE_EQ_EPSILON 1E-3
#define ck_assert_double_eq(X,Y) \
do { \
double _ck_x = X; \
double _ck_y = Y; \
ck_assert_msg(fabs(_ck_x - _ck_y) < CK_DOUBLE_EQ_EPSILON, \
"Assertion '" #X " == " #Y \
"' failed: "#X"==%f, "#Y"==%f", \
_ck_x, \
_ck_y); \
} while (0)
#define ck_assert_double_ne(X,Y) \
do { \
double _ck_x = X; \
double _ck_y = Y; \
ck_assert_msg(fabs(_ck_x - _ck_y) > CK_DOUBLE_EQ_EPSILON, \
"Assertion '" #X " != " #Y \
"' failed: "#X"==%f, "#Y"==%f", \
_ck_x, \
_ck_y); \
} while (0)
#define _ck_assert_double_eq(X, OP, Y) \
do { \
double _ck_x = X; \
double _ck_y = Y; \
ck_assert_msg(_ck_x OP _ck_y || \
fabs(_ck_x - _ck_y) < CK_DOUBLE_EQ_EPSILON, \
"Assertion '" #X#OP#Y \
"' failed: "#X"==%f, "#Y"==%f", \
_ck_x, \
_ck_y); \
} while (0)
#define _ck_assert_double_ne(X, OP,Y) \
do { \
double _ck_x = X; \
double _ck_y = Y; \
ck_assert_msg(_ck_x OP _ck_y && \
fabs(_ck_x - _ck_y) > CK_DOUBLE_EQ_EPSILON, \
"Assertion '" #X#OP#Y \
"' failed: "#X"==%f, "#Y"==%f", \
_ck_x, \
_ck_y); \
} while (0)
#define ck_assert_double_lt(X, Y) _ck_assert_double_ne(X, <, Y)
#define ck_assert_double_le(X, Y) _ck_assert_double_eq(X, <=, Y)
#define ck_assert_double_gt(X, Y) _ck_assert_double_ne(X, >, Y)
#define ck_assert_double_ge(X, Y) _ck_assert_double_eq(X, >=, Y)
#endif /* LITEST_H */