gdm-common: Add gdm_shell_expand() and tests

This allows shell-like expansion of strings. It will be later
used to allow configuring the environment via config files.

https://bugzilla.gnome.org/show_bug.cgi?id=751158

1 files changed, 110 insertions, 0 deletions

diff --git a/tests/s-common.c b/tests/s-common.c
new file mode 100644
index 00000000..c91306fe
--- /dev/null
+++ b/tests/s-common.c
@@ -0,0 +1,110 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2007 Andrew Ziem <ahz001@gmail.com>
+ * Copyright (C) 2007 William Jon McCann <mccann@jhu.edu>
+ * Copyright (C) 2015 Alexander Larsson <alexl@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <glib.h>
+#include <check.h>
+
+#include "gdm-common.h"
+#include "s-common.h"
+
+static void
+setup (void)
+{
+}
+
+static void
+teardown (void)
+{
+}
+
+static char *
+expand_fn (const char *var, gpointer data)
+{
+        if (strcmp (var, "FOO") == 0)
+                return g_strdup ("BAR");
+        if (strcmp (var, "FOO9") == 0)
+                return g_strdup ("XXX");
+        if (strcmp (var, "_FOO") == 0)
+                return g_strdup ("YYY");
+        if (strcmp (var, "FOO_FOO") == 0)
+                return g_strdup ("ZZZ");
+        return NULL;
+}
+
+static gboolean expands_to (const char *to_expand, const char *expanded)
+{
+        return strcmp (gdm_shell_expand (to_expand, expand_fn, NULL), expanded) == 0;
+}
+
+START_TEST (test_gdm_shell_expand)
+{
+        fail_unless (expands_to ("foo", "foo"));
+        fail_unless (expands_to ("foo ", "foo "));
+        fail_unless (expands_to ("foo#bar", "foo#bar"));
+        fail_unless (expands_to ("foo #bar", "foo "));
+        fail_unless (expands_to ("#bar", ""));
+        fail_unless (expands_to ("foo #bar gazonk", "foo "));
+        fail_unless (expands_to ("foo #bar gazonk", "foo "));
+        fail_unless (expands_to ("foo #bar gazonk", "foo "));
+        fail_unless (expands_to ("$FOO", "BAR"));
+        fail_unless (expands_to ("$9FOO", "$9FOO"));
+        fail_unless (expands_to ("$FOO9", "XXX"));
+        fail_unless (expands_to ("${FOO}9", "BAR9"));
+        fail_unless (expands_to ("$_FOO", "YYY"));
+        fail_unless (expands_to ("$FOO_FOO", "ZZZ"));
+        fail_unless (expands_to ("${FOO}", "BAR"));
+        fail_unless (expands_to ("$FOO$FOO", "BARBAR"));
+        fail_unless (expands_to ("${FOO}${FOO}", "BARBAR"));
+        fail_unless (expands_to ("$FOO${FOO}", "BARBAR"));
+        fail_unless (expands_to ("$foo", ""));
+        fail_unless (expands_to ("$FOOBAR", ""));
+        fail_unless (expands_to ("$FOO/BAR", "BAR/BAR"));
+        fail_unless (expands_to ("${FOO}BAR", "BARBAR"));
+        fail_unless (expands_to ("$/BAR", "$/BAR"));
+        fail_unless (expands_to ("${FOO BAR}BAR", "${FOO BAR}BAR"));
+        fail_unless (expands_to ("${}BAR", "${}BAR"));
+        fail_unless (expands_to ("${$FOO}BAR", "${BAR}BAR"));
+        fail_unless (expands_to ("\\$foo", "$foo"));
+        fail_unless (expands_to ("a\\\\b", "a\\b"));
+        fail_unless (expands_to ("a\\b", "a\\b"));
+        fail_unless (expands_to ("a\\#b", "a#b"));
+}
+END_TEST
+
+Suite *
+suite_common (void)
+{
+        Suite *s;
+        TCase *tc_core;
+
+        s = suite_create ("gdm-common");
+        tc_core = tcase_create ("core");
+
+        tcase_add_checked_fixture (tc_core, setup, teardown);
+        tcase_add_test (tc_core, test_gdm_shell_expand);
+        suite_add_tcase (s, tc_core);
+
+        return s;
+}