Mercurial > hg > octave-nkf > gnulib-hg
diff tests/test-expm1-ieee.h @ 16589:338bc8a6f860
Tests for module 'expm1-ieee'.
* modules/expm1-ieee-tests: New file.
* tests/test-expm1-ieee.c: New file.
* tests/test-expm1-ieee.h: New file.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Wed, 07 Mar 2012 00:39:56 +0100 |
parents | |
children | e542fd46ad6f |
line wrap: on
line diff
new file mode 100644 --- /dev/null +++ b/tests/test-expm1-ieee.h @@ -0,0 +1,43 @@ +/* Test of expm1*() 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. */ + + /* Underflow. */ + ASSERT (EXPM1 (-100000.0) == - L_(1.0)); + + /* NaN. */ + ASSERT (ISNAN (EXPM1 (NAN))); + + /* Zero. */ + { + DOUBLE z = EXPM1 (L_(0.0)); + ASSERT (z == L_(0.0)); + ASSERT (!signbit (z)); + } + { + DOUBLE z = EXPM1 (MINUS_ZERO); + ASSERT (z == L_(0.0)); + ASSERT (!!signbit (z) == !!signbit (MINUS_ZERO)); + } + + /* Infinity. */ + ASSERT (EXPM1 (- INFINITY) == - L_(1.0)); + ASSERT (EXPM1 (INFINITY) == INFINITY); +}