Tests for module 'rint'.

diff --git a/ChangeLog b/ChangeLog
index 37c093fafd2fe18251cd9d288d7c0d35eceee927..dbc45213d8fa73d715400ead3502a17534cafc10 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2010-01-24  Bruno Haible  <bruno@clisp.org>
 
+       Tests for module 'rint'.
+       * modules/rint-tests: New file.
+       * tests/test-rint.c: New file.
+
        Tests for module 'remainder'.
        * modules/remainder-tests: New file.
        * tests/test-remainder.c: New file.

diff --git a/modules/rint-tests b/modules/rint-tests
new file mode 100644 (file)
index 0000000..315fda3
--- /dev/null
+++ b/modules/rint-tests
@@ -0,0 +1,13 @@
+Files:
+tests/test-rint.c
+tests/signature.h
+tests/macros.h
+
+Depends-on:
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-rint
+check_PROGRAMS += test-rint
+test_rint_LDADD = $(LDADD) @RINT_LIBM@

diff --git a/tests/test-rint.c b/tests/test-rint.c
new file mode 100644 (file)
index 0000000..a2b26da
--- /dev/null
+++ b/tests/test-rint.c
@@ -0,0 +1,61 @@
+/* Test of rint() function.
+   Copyright (C) 2010 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/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
+
+#include <config.h>
+
+#include <math.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (rint, double, (double));
+
+#include "macros.h"
+
+volatile double x;
+double y;
+
+int
+main ()
+{
+  /* Assume round-to-nearest rounding (the default in IEEE 754).  */
+
+  x = 2.1;
+  y = rint (x);
+  ASSERT (y == 2.0);
+
+  x = -2.1;
+  y = rint (x);
+  ASSERT (y == -2.0);
+
+  x = 2.7;
+  y = rint (x);
+  ASSERT (y == 3.0);
+
+  x = -2.7;
+  y = rint (x);
+  ASSERT (y == -3.0);
+
+  x = 2.5;
+  y = rint (x);
+  ASSERT (y == 2.0);
+
+  x = 3.5;
+  y = rint (x);
+  ASSERT (y == 4.0);
+
+  return 0;
+}