1 files changed, 68 insertions, 0 deletions
diff --git a/tests/tdigamma.c b/tests/tdigamma.c
new file mode 100644
index 0000000..3ed568a
--- /dev/null
+++ b/tests/tdigamma.c
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+/* test file for digamma function
+
+Copyright 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
+Contributed by the AriC and Caramel projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+The GNU MPFR Library 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
+http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
+51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "mpfr-test.h"
+
+#define TEST_FUNCTION mpfr_digamma
+#include "tgeneric.c"
+
+static void
+special (void)
+{
+  mpfr_t x, y;
+
+  mpfr_init (x);
+  mpfr_init (y);
+
+  mpfr_set_inf (y, -1);
+  mpfr_set_inf (x, 1);
+  mpfr_digamma (y, x, MPFR_RNDN);
+  if (mpfr_inf_p (y) == 0 || mpfr_sgn (y) < 0)
+    {
+      printf ("error for Psi(+Inf)\n");
+      printf ("expected +Inf\n");
+      printf ("got      ");
+      mpfr_dump (y);
+      exit (1);
+    }
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+}
+
+int
+main (int argc, char *argv[])
+{
+  tests_start_mpfr ();
+
+  special ();
+
+  test_generic (2, 100, 2);
+
+  data_check ("data/digamma", mpfr_digamma, "mpfr_digamma");
+
+  tests_end_mpfr ();
+  return 0;
+}