test failure (HAVE_GETPWUID) on MacOS X

[John W. Eaton]

On 31-Dec-2009, Ben Abbott wrote:

| I've posted this before, but as there has been no reply, I'm trying again ... 
with a more specific subject this time.
| 
|       
http://old.nabble.com/2-test-failures-on-Mac-OS-10.6-tc26892662.html#a26892662
| 
| The test below fails during "make check".
| 
| 349 >>>>> processing test_system
| 350   ***** testif HAVE_GETPWUID
| 351  x = getpwuid (getuid ());
| 352  assert((strcmp (x.dir, tilde_expand ("~"))
| 353  && strcmp (x.dir, tilde_expand (sprintf ("~%s", x.name)))
| 354  && strcmp ("foobar", tilde_expand ("foobar"))));
| 355 !!!!! test failed
| 356 assert ((strcmp (x.dir, tilde_expand ("~")) && strcmp (x.dir, 
tilde_expand (sprintf ("~%s", x.name))) && strcmp ("foobar", tilde_expand 
("foobar")))) failed
| 357 >>>>> processing test_transpose
| 358 >>>>> processing test_try
| 359 >>>>> processing test_unwind
| 360 >>>>> processing test_while
| 361 
| 362 Files with no tests:
| 
| However, the "assert" passes when I try it on the command line.
| 
| octave:14> (strcmp (x.dir, tilde_expand ("~")) && strcmp (x.dir, tilde_expand 
(sprintf ("~%s", x.name))) && strcmp ("foobar", tilde_expand ("foobar")))
| ans =  1

I can't duplicate this problem.  To debug what is happening, I'd start
by looking at the individual components of the expression when the
test is run by make check.  Try inserting something like the
following into the test:

  x = getpwuid (getuid ());
  fid = fopen ("foo", "w");
  fdisp (fid, x);
  fdisp (fid, tilde_expand ("~"));
  fdisp (fid, sprintf ("~%s", x.name));
  fdisp (fid, tilde_expand (sprintf ("~%s", x.name)));
  fdisp (fid, tilde_expand ("foobar"));
  fclose (fid);

and then see if the file gives you any clues about why the
comparisons are failing.

jwe