1 files changed, 67 insertions, 0 deletions
diff --git a/tests/test-putenv.c b/tests/test-putenv.c
new file mode 100644
index 00000000..535fbbbb
--- /dev/null
+++ b/tests/test-putenv.c
@@ -0,0 +1,67 @@
+/* Test the putenv function.
+   Copyright (C) 2024 Free Software Foundation, Inc.
+
+   This file 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 file 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/>.  */
+
+/* Written by Collin Funk <collin.funk1@gmail.com>, 2024.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (putenv, int, (char *));
+
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  char *ptr;
+
+  /* Verify the environment is clean.  */
+  unsetenv ("TEST_VAR");
+  ASSERT (getenv ("TEST_VAR") == NULL);
+
+  /* Use static on variables passed to the environment to pacify
+     -Wanalyzer-putenv-of-auto-var.  */
+
+  /* Verify adding an environment variable.  */
+  {
+    static char var[] = "TEST_VAR=abc";
+    ASSERT (putenv (var) == 0);
+    ptr = getenv ("TEST_VAR");
+    ASSERT (ptr != NULL);
+    ASSERT (STREQ (ptr, "abc"));
+  }
+
+  /* Verify removing an environment variable.  */
+  {
+    static char var[] = "TEST_VAR";
+    ASSERT (putenv (var) == 0);
+    ASSERT (getenv ("TEST_VAR") == NULL);
+  }
+
+  /* Verify the behavior when removing a variable not in the environment.  */
+  {
+    static char var[] = "TEST_VAR";
+    ASSERT (putenv (var) == 0);
+    ASSERT (getenv ("TEST_VAR") == NULL);
+  }
+
+  return test_exit_status;
+}