>From 97313e9122e3f9780f6d259361f5e9e495b6d4eb Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Wed, 17 Apr 2024 10:58:47 +0200
Subject: [PATCH 2/6] getpayload: Add tests.

* tests/test-getpayload.c: New file.
* modules/getpayload-tests: New file.
---
 ChangeLog                |   4 ++
 modules/getpayload-tests |  18 +++++++
 tests/test-getpayload.c  | 112 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 134 insertions(+)
 create mode 100644 modules/getpayload-tests
 create mode 100644 tests/test-getpayload.c

diff --git a/ChangeLog b/ChangeLog
index 6fbcff9835..495ea4d996 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2024-04-17  Bruno Haible  <bruno@clisp.org>
 
+	getpayload: Add tests.
+	* tests/test-getpayload.c: New file.
+	* modules/getpayload-tests: New file.
+
 	getpayload: New module.
 	* lib/math.in.h (getpayload): New declaration.
 	* lib/getpayload.c: New file.
diff --git a/modules/getpayload-tests b/modules/getpayload-tests
new file mode 100644
index 0000000000..d56192d63b
--- /dev/null
+++ b/modules/getpayload-tests
@@ -0,0 +1,18 @@
+Files:
+tests/test-getpayload.c
+tests/minus-zero.h
+tests/infinity.h
+tests/signature.h
+tests/macros.h
+
+Depends-on:
+setpayload
+setpayloadsig
+signed-snan
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-getpayload
+check_PROGRAMS += test-getpayload
+test_getpayload_LDADD = $(LDADD) @GETPAYLOAD_LIBM@ $(SETPAYLOAD_LIBM) $(SETPAYLOADSIG_LIBM)
diff --git a/tests/test-getpayload.c b/tests/test-getpayload.c
new file mode 100644
index 0000000000..a6d9d940bd
--- /dev/null
+++ b/tests/test-getpayload.c
@@ -0,0 +1,112 @@
+/* Test getpayload.
+   Copyright 2024 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 <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <math.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (getpayload, double, (const double *));
+
+#include "minus-zero.h"
+#include "infinity.h"
+#include "signed-snan.h"
+#include "macros.h"
+
+#define PAYLOAD_BITS (53 - 2) /* = (DBL_MANT_DIG - 2) */
+
+int
+main ()
+{
+  double arg;
+  double ret;
+
+  /* Test non-NaN arguments.  */
+
+  arg = 2.718281828459045;
+  ret = getpayload (&arg);
+  ASSERT (ret == -1.0);
+
+  arg = -3.141592653589793;
+  ret = getpayload (&arg);
+  ASSERT (ret == -1.0);
+
+  arg = 0.0;
+  ret = getpayload (&arg);
+  ASSERT (ret == -1.0);
+
+  arg = minus_zerod;
+  ret = getpayload (&arg);
+  ASSERT (ret == -1.0);
+
+  arg = Infinityd ();
+  ret = getpayload (&arg);
+  ASSERT (ret == -1.0);
+
+  arg = - Infinityd ();
+  ret = getpayload (&arg);
+  ASSERT (ret == -1.0);
+
+  /* Test quiet NaNs.  */
+  {
+    int i;
+    double p;
+
+    for (i = 0, p = 1.0; i < PAYLOAD_BITS; i++, p *= 2.0)
+      {
+        ASSERT (setpayload (&arg, p) == 0);
+        ret = getpayload (&arg);
+        ASSERT (ret == p);
+        /* Test quiet NaNs with sign bit == 1.  */
+        arg = - arg;
+        ret = getpayload (&arg);
+        ASSERT (ret == p);
+      }
+
+    p = 1320699239819071.0;
+    ASSERT (setpayload (&arg, p) == 0);
+    ret = getpayload (&arg);
+    ASSERT (ret == p);
+  }
+
+  /* Test signalling NaNs.  */
+  {
+    int i;
+    double p;
+
+    for (i = 0, p = 1.0; i < PAYLOAD_BITS; i++, p *= 2.0)
+      {
+        ASSERT (setpayloadsig (&arg, p) == 0);
+        ret = getpayload (&arg);
+        ASSERT (ret == p);
+      }
+
+    p = 1320699239819071.0;
+    ASSERT (setpayloadsig (&arg, p) == 0);
+    ret = getpayload (&arg);
+    ASSERT (ret == p);
+
+    /* Test signalling NaNs with sign bit == 1.  */
+    memory_double pos_arg = memory_positive_SNaNd ();
+    memory_double neg_arg = memory_negative_SNaNd ();
+    double pos_ret = getpayload (&pos_arg.value);
+    double neg_ret = getpayload (&neg_arg.value);
+    ASSERT (neg_ret == pos_ret);
+  }
+
+  return 0;
+}
-- 
2.34.1