Tests for module 'log2'.

[gnulib.git] / tests / test-log2.c

diff --git a/tests/test-log2.c b/tests/test-log2.c
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+/* Test of log2() function.
+   Copyright (C) 2010-2012 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/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2012.  */
+
+#include <config.h>
+
+#include <math.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (log2, double, (double));
+
+#include <float.h>
+
+#include "minus-zero.h"
+#include "macros.h"
+
+#define DOUBLE double
+#define HUGEVAL HUGE_VAL
+#define L_(literal) literal
+#define MANT_DIG DBL_MANT_DIG
+#define MAX_EXP DBL_MAX_EXP
+#define MIN_EXP DBL_MIN_EXP
+#define MINUS_ZERO minus_zerod
+#define LOG2 log2
+#define RANDOM randomd
+#include "test-log2.h"
+
+int
+main ()
+{
+  /* A particular value.  */
+  x = 0.6;
+  y = log2 (x);
+  ASSERT (y >= -0.7369655942 && y <= -0.7369655941);
+
+  test_function ();
+
+  return 0;
+}