view tests/test-log10-ieee.h @ 16740:c25dcde7c69c

Tests for module 'log10f-ieee'. * modules/log10f-ieee-tests: New file. * tests/test-log10f-ieee.c: New file. * tests/test-log10-ieee.h: New file.
author Bruno Haible <bruno@clisp.org>
date Sun, 01 Apr 2012 16:59:53 +0200
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children e542fd46ad6f
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/* Test of log10*() function family.
   Copyright (C) 2012 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

static void
test_function (void)
{
  /* [MX] shaded specification in POSIX.  */

  /* Negative arguments.  */
  ASSERT (ISNAN (LOG10 (- L_(0.00001))));
  ASSERT (ISNAN (LOG10 (- L_(1.0))));
  ASSERT (ISNAN (LOG10 (- L_(1000000.0))));
  ASSERT (ISNAN (LOG10 (- INFINITY)));

  /* NaN.  */
  ASSERT (ISNAN (LOG10 (NAN)));

  /* Only rational value.  */
  {
    DOUBLE z = LOG10 (L_(1.0));
    ASSERT (z == L_(0.0));
    ASSERT (!signbit (z));
  }

  /* Infinity.  */
  ASSERT (LOG10 (INFINITY) == INFINITY);
}