1 files changed, 89 insertions, 0 deletions
diff --git a/tests/test-error.c b/tests/test-error.c
new file mode 100644
index 00000000..02704d7c
--- /dev/null
+++ b/tests/test-error.c
@@ -0,0 +1,89 @@
+/* Test of error.h functions.
+   Copyright (C) 2023-2024 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/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2023.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <error.h>
+
+#include <errno.h>
+
+#include "macros.h"
+
+/* Custom function to not show the program name in error messages.  */
+static void
+print_no_progname (void)
+{
+}
+
+int
+main ()
+{
+  /* Test error() function with zero STATUS and zero ERRNUM.  */
+  error (0, 0, "bummer");
+  /* With format string arguments.  */
+  errno = EINVAL; /* should be ignored */
+  error (0, 0, "Zonk %d%d%d is too large", 1, 2, 3);
+  /* With non-ASCII characters.  */
+  error (0, 0, "Pokémon started");
+  /* Verify error_message_count.  */
+  ASSERT (error_message_count == 3);
+
+  /* Test error_at_line() function with zero STATUS and zero ERRNUM.  */
+  error_at_line (0, 0, "d1/foo.c", 10, "invalid blub");
+  error_at_line (0, 0, "d1/foo.c", 10, "invalid blarn");
+  /* Verify error_message_count.  */
+  ASSERT (error_message_count == 5);
+
+  /* Test error_one_per_line.  */
+  error_one_per_line = 1;
+  error_at_line (0, 0, "d1/foo.c", 10, "unsupported glink");
+  /* Another line number.  */
+  error_at_line (0, 0, "d1/foo.c", 13, "invalid brump");
+  /* Another file name.  */
+  error_at_line (0, 0, "d2/foo.c", 13, "unsupported flinge");
+  /* Same file name and same line number => message not shown.  */
+  error_at_line (0, 0, "d2/foo.c", 13, "invalid bark");
+  /* Verify error_message_count.  */
+  ASSERT (error_message_count == 8);
+  error_one_per_line = 0;
+
+  /* Test error_print_progname.  */
+  error_print_progname = print_no_progname;
+  error (0, 0, "hammer");
+  error (0, 0, "boing %d%d%d is too large", 1, 2, 3);
+  #if 0
+  /* The documentation does not describe the output if the file name is NULL. */
+  error_at_line (0, 0, NULL, 42, "drummer too loud");
+  #endif
+  error_at_line (0, 0, "d2/bar.c", 11, "bark too loud");
+  /* Verify error_message_count.  */
+  ASSERT (error_message_count == 11);
+  error_print_progname = NULL;
+
+  /* Test error() function with nonzero ERRNUM.  */
+  errno = EINVAL; /* should be ignored */
+  error (0, EACCES, "can't steal");
+  /* Verify error_message_count.  */
+  ASSERT (error_message_count == 12);
+
+  /* Test error() function with nonzero STATUS.  */
+  error (4, 0, "fatal error");
+
+  return 0;
+}