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test_utils: don't use subprocess for diffing test results 

Helps with testing during cross-compilation and avoids external
dependency.

Output maybe is not that nice, but this output in our tests is not
useful anyway. We know if it changes it is beacuse one of the dependency
version changed.
This commit is contained in:
Kacper Michajłow 2024-05-21 22:46:00 +02:00
parent 09c359e1d3
commit 734846c123
1 changed files with 46 additions and 14 deletions
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60
test/test_utils.c
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@ -60,23 +60,55 @@ void assert_text_files_equal_impl(const char *file, int line,
const char *ref, const char *new, const char *ref, const char *new,
const char *err) const char *err)
{ {
char *path_ref = mp_tprintf(4096, "%s/%s", refdir, ref); char path_ref[4096];
char *path_new = mp_tprintf(4096, "%s/%s", outdir, new); char path_new[4096];
struct mp_subprocess_opts opts = { snprintf(path_ref, sizeof(path_ref), "%s/%s", refdir, ref);
.exe = "diff", snprintf(path_new, sizeof(path_new), "%s/%s", outdir, new);
.args = (char*[]){"diff", "-u", "--", path_ref, path_new, 0},
.fds = { {0, .src_fd = 0}, {1, .src_fd = 1}, {2, .src_fd = 2} },
.num_fds = 3,
};
struct mp_subprocess_result res; bool ok = false;
mp_subprocess2(&opts, &res); FILE *fref = fopen(path_ref, "r");
FILE *fnew = fopen(path_new, "r");
if (res.error || res.exit_status) { if (!fref || !fnew) {
if (res.error) printf("Error: Could not open files %s or %s\n", path_ref, path_new);
printf("Note: %s\n", mp_subprocess_err_str(res.error)); goto done;
printf("Giving up.\n"); }
char ref_line[4096];
char new_line[4096];
int line_num = 0;
while (fgets(ref_line, sizeof(ref_line), fref))
{
line_num++;
if (!fgets(new_line, sizeof(new_line), fnew)) {
printf("Extra line %d in reference file: %s", line_num, ref_line);
goto done;
}
if (strcmp(ref_line, new_line)) {
printf("Difference found at line %d:\n", line_num);
printf("Reference: %s", ref_line);
printf("New file: %s", new_line);
goto done;
}
}
if (fgets(new_line, sizeof(new_line), fnew)) {
printf("Extra line %d in new file: %s", line_num, new_line);
goto done;
}
ok = true;
done:
if (fref)
fclose(fref);
if (fnew)
fclose(fnew);
if (!ok) {
fflush(stdout); fflush(stdout);
abort(); abort();
} }