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tests: Use fuzzy comparison in test-suite

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Using exact comparison ("a == b") when comparing expected with computed
test data fails the test-suite on many architectures (including, but not
limited to armhf and arm64).

Instead, use epsilon(for now, FLT_EPSILON and DBL_EPSILON) to compare
floating point numbers for equality.


Closes: https://github.com/libsndfile/libsndfile/issues/866

Signed-off-by: IOhannes m zmölnig <zmoelnig@iem.at>
This commit is contained in:
IOhannes m zmölnig 2022-09-08 10:49:36 +02:00 committed by evpobr
parent 36216ba105
commit cefd7b59df
1 changed files with 25 additions and 2 deletions
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27
tests/utils.tpl
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@ -193,6 +193,7 @@ sf_count_t file_length_fd (int fd) ;
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <float.h>
#include <fcntl.h>
#include <sys/stat.h>
@ -215,6 +216,28 @@ sf_count_t file_length_fd (int fd) ;
#define O_BINARY 0
#endif
/*
** Compare for equality, with epsilon
*/
static inline int
equals_short (const short a, const short b)
{ return (a == b);
} /* equals_short */
static inline int
equals_int (const int a, const int b)
{ return (a == b);
} /* equals_int */
static inline int
equals_float (const float a, const float b)
{ return (fabsf(a - b) <= FLT_EPSILON);
} /* equals_float */
static inline int
equals_double (const double a, const double b)
{ return (fabs(a - b) <= DBL_EPSILON);
} /* equals_double */
[+ FOR float_type +]
void
gen_windowed_sine_[+ (get "name") +] ([+ (get "name") +] *data, int len, double maximum)
@ -752,8 +775,8 @@ compare_[+ (get "io_element") +]_or_die (const [+ (get "io_element") +] *expecte
unsigned k ;
for (k = 0 ; k < count ; k++)
if (expected [k] != actual [k])
{ printf ("\n\nLine %d : Error at index %d, got " [+ (get "format_str") +] ", should be " [+ (get "format_str") +] ".\n\n", line_num, k, actual [k], expected [k]) ;
if (!equals_[+ (get "io_element") +](expected [k], actual [k]))
{ printf ("\n\nLine %d : Error at index %d, got " [+ (get "format_str") +] ", should be " [+ (get "format_str") +] "(delta=" [+ (get "format_str") +] " ).\n\n", line_num, k, actual [k], expected [k], actual [k] - expected [k]) ;
exit (1) ;
} ;