unicodeio: Add tests.

* tests/test-unicodeio.c: New file.
* tests/test-unicodeio1.sh: New file.
* tests/test-unicodeio2.sh: New file.
* tests/test-unicodeio3.sh: New file.
* modules/unicodeio-tests: New file.

6 files changed, 146 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index aa36674461..c2182f08c5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,14 @@
 2020-07-08  Bruno Haible  <bruno@clisp.org>
 
+	unicodeio: Add tests.
+	* tests/test-unicodeio.c: New file.
+	* tests/test-unicodeio1.sh: New file.
+	* tests/test-unicodeio2.sh: New file.
+	* tests/test-unicodeio3.sh: New file.
+	* modules/unicodeio-tests: New file.
+
+2020-07-08  Bruno Haible  <bruno@clisp.org>
+
 	unicodeio: Document link requirements.
 	* modules/unicodeio (Link): New section.
 
diff --git a/modules/unicodeio-tests b/modules/unicodeio-tests
new file mode 100644
index 0000000000..d771ff81f4
--- /dev/null
+++ b/modules/unicodeio-tests
@@ -0,0 +1,21 @@
+Files:
+tests/test-unicodeio1.sh
+tests/test-unicodeio2.sh
+tests/test-unicodeio3.sh
+tests/test-unicodeio.c
+tests/macros.h
+m4/locale-fr.m4
+m4/locale-zh.m4
+m4/codeset.m4
+
+Depends-on:
+setlocale
+
+configure.ac:
+gt_LOCALE_FR_UTF8
+gt_LOCALE_ZH_CN
+
+Makefile.am:
+TESTS += test-unicodeio1.sh test-unicodeio2.sh test-unicodeio3.sh
+check_PROGRAMS += test-unicodeio
+test_unicodeio_LDADD = $(LDADD) $(LIB_SETLOCALE) $(LIBICONV)
diff --git a/tests/test-unicodeio.c b/tests/test-unicodeio.c
new file mode 100644
index 0000000000..be91a91646
--- /dev/null
+++ b/tests/test-unicodeio.c
@@ -0,0 +1,81 @@
+/* Tests for Unicode character output.
+
+   Copyright (C) 2020 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, 2020.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unicodeio.h"
+
+#include <locale.h>
+#include <string.h>
+
+#include "macros.h"
+
+#define TEST_CODE 0x2022
+#define TEST_CODE_AS_UTF8 "\xe2\x80\xa2"
+#define TEST_CODE_AS_GB18030 "\x81\x36\xa6\x31"
+
+static char result[64];
+
+static long
+success_callback (const char *buf, size_t buflen, void *callback_arg)
+{
+  memcpy (result, buf, buflen);
+  result[buflen] = '\0';
+  return 42;
+}
+
+static long
+failure_callback (unsigned int code, const char *msg, void *callback_arg)
+{
+  ASSERT (code == TEST_CODE);
+  strcpy (result, ".");
+  return 55;
+}
+
+int
+main (int argc, char *argv[])
+{
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  switch (unicode_to_mb (TEST_CODE, success_callback, failure_callback, NULL))
+    {
+    case 42:
+      if (argc > 1)
+        switch (argv[1][0])
+          {
+          case '2':
+            ASSERT (strcmp (result, TEST_CODE_AS_UTF8) == 0);
+            break;
+          case '3':
+            ASSERT (strcmp (result, TEST_CODE_AS_GB18030) == 0);
+            break;
+          }
+      break;
+    case 55:
+      ASSERT (strcmp (result, ".") == 0);
+      break;
+    default:
+      ASSERT (0);
+    }
+
+  return 0;
+}
diff --git a/tests/test-unicodeio1.sh b/tests/test-unicodeio1.sh
new file mode 100755
index 0000000000..5f5f1bd3ad
--- /dev/null
+++ b/tests/test-unicodeio1.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+# Test in the C locale.
+LC_ALL=C \
+${CHECKER} ./test-unicodeio${EXEEXT} 1
diff --git a/tests/test-unicodeio2.sh b/tests/test-unicodeio2.sh
new file mode 100755
index 0000000000..f0ec8fb633
--- /dev/null
+++ b/tests/test-unicodeio2.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific UTF-8 locale is installed.
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+if test $LOCALE_FR_UTF8 = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no french Unicode locale is installed"
+  else
+    echo "Skipping test: no french Unicode locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_FR_UTF8 \
+${CHECKER} ./test-unicodeio${EXEEXT} 2
diff --git a/tests/test-unicodeio3.sh b/tests/test-unicodeio3.sh
new file mode 100755
index 0000000000..1544c9614c
--- /dev/null
+++ b/tests/test-unicodeio3.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific GB18030 locale is installed.
+: ${LOCALE_ZH_CN=zh_CN.GB18030}
+if test $LOCALE_ZH_CN = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no transitional chinese locale is installed"
+  else
+    echo "Skipping test: no transitional chinese locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_ZH_CN \
+${CHECKER} ./test-unicodeio${EXEEXT} 3