gstrutils: Set locale explicitly for search-utils test

The test checks `g_str_match_string()` function, which performs matches
based on user's locale. For this reason, some tests may fail, e.g., see
issue #868.

Now we explicitly set locale for each test, with C locale as a fallback
when the locale is not available.

glib/tests/search-utils.c

@@ -7,74 +7,120 @@ typedef struct
 {
   const gchar *string;
   const gchar *prefix;
+  const gchar *locale;
   gboolean should_match;
 } SearchTest;
 
+/* Test word separators and case */
+SearchTest basic[] = {
+  { "Hello World", "he", "C", TRUE },
+  { "Hello World", "wo", "C", TRUE },
+  { "Hello World", "lo", "C", FALSE },
+  { "Hello World", "ld", "C", FALSE },
+  { "Hello-World", "wo", "C", TRUE },
+  { "HelloWorld", "wo", "C", FALSE },
+  { NULL, NULL, NULL, FALSE }
+};
+
+/* Test composed chars (accentued letters) */
+SearchTest composed[] = {
+  { "Jörgen", "jor", "sv_SE.UTF-8", TRUE },
+  { "Gaëtan", "gaetan", "fr_FR.UTF-8", TRUE },
+  { "élève", "ele", "fr_FR.UTF-8", TRUE },
+  { "Azais", "AzaÏs", "fr_FR.UTF-8", FALSE },
+  { "AzaÏs", "Azais", "fr_FR.UTF-8", TRUE },
+  { NULL, NULL, NULL, FALSE }
+};
+
+/* Test decomposed chars, they looks the same, but are actually
+ * composed of multiple unicodes */
+SearchTest decomposed[] = {
+  { "Jorgen", "Jör", "sv_SE.UTF-8", FALSE },
+  { "Jörgen", "jor", "sv_SE.UTF-8", TRUE },
+  { NULL, NULL, NULL, FALSE }
+};
+
+/* Turkish special case */
+SearchTest turkish[] = {
+  { "İstanbul", "ist", "tr_TR.UTF-8", TRUE },
+  { "Diyarbakır", "diyarbakir", "tr_TR.UTF-8", TRUE },
+  { NULL, NULL, NULL, FALSE }
+};
+
+/* Test unicode chars when no locale is available */
+SearchTest c_locale_unicode[] = {
+  { "Jörgen", "jor", "C", TRUE },
+  { "Jorgen", "Jör", "C", FALSE },
+  { "Jörgen", "jor", "C", TRUE },
+  { NULL, NULL, NULL, FALSE }
+};
+
+/* Multi words */
+SearchTest multi_words[] = {
+  { "Xavier Claessens", "Xav Cla", "C", TRUE },
+  { "Xavier Claessens", "Cla Xav", "C", TRUE },
+  { "Foo Bar Baz", "   b  ", "C", TRUE },
+  { "Foo Bar Baz", "bar bazz", "C", FALSE },
+  { NULL, NULL, NULL, FALSE }
+};
+
 static void
-test_search (void)
+test_search (gconstpointer d)
 {
-  SearchTest tests[] =
+  const SearchTest *tests = d;
-    {
-      /* Test word separators and case */
-      { "Hello World", "he", TRUE },
-      { "Hello World", "wo", TRUE },
-      { "Hello World", "lo", FALSE },
-      { "Hello World", "ld", FALSE },
-      { "Hello-World", "wo", TRUE },
-      { "HelloWorld", "wo", FALSE },
-
-      /* Test composed chars (accentued letters) */
-      { "Jörgen", "jor", TRUE },
-      { "Gaëtan", "gaetan", TRUE },
-      { "élève", "ele", TRUE },
-      { "Azais", "AzaÏs", FALSE },
-      { "AzaÏs", "Azais", TRUE },
-
-      /* Test decomposed chars, they looks the same, but are actually
-       * composed of multiple unicodes */
-      { "Jorgen", "Jör", FALSE },
-      { "Jörgen", "jor", TRUE },
-
-      /* Turkish special case */
-      { "İstanbul", "ist", TRUE },
-      { "Diyarbakır", "diyarbakir", TRUE },
-
-      /* Multi words */
-      { "Xavier Claessens", "Xav Cla", TRUE },
-      { "Xavier Claessens", "Cla Xav", TRUE },
-      { "Foo Bar Baz", "   b  ", TRUE },
-      { "Foo Bar Baz", "bar bazz", FALSE },
-
-      { NULL, NULL, FALSE }
-    };
   guint i;
-
+  gboolean all_skipped = TRUE;
-  setlocale(LC_ALL, "");
 
   g_debug ("Started");
-  for (i = 0; tests[i].string != NULL; i ++)
+
+  for (i = 0; tests[i].string != NULL; i++)
     {
       gboolean match;
       gboolean ok;
+      gboolean skipped;
 
-      match = g_str_match_string (tests[i].prefix, tests[i].string, TRUE);
+      if (setlocale (LC_ALL, tests[i].locale))
-      ok = (match == tests[i].should_match);
+        {
+          skipped = FALSE;
+          all_skipped = FALSE;
+          match = g_str_match_string (tests[i].prefix, tests[i].string, TRUE);
+          ok = (match == tests[i].should_match);
+        }
+      else
+        {
+          skipped = TRUE;
+          g_test_message ("Locale '%s' is unavailable", tests[i].locale);
+        }
 
       g_debug ("'%s' - '%s' %s: %s", tests[i].prefix, tests[i].string,
           tests[i].should_match ? "should match" : "should NOT match",
-          ok ? "OK" : "FAILED");
+          skipped ? "SKIPPED" : ok ? "OK" : "FAILED");
 
-      g_assert (ok);
+      g_assert (skipped || ok);
     }
+
+  if (all_skipped)
+    g_test_skip ("No locales for the test set are available");
 }
 
 int
 main (int argc,
       char **argv)
 {
+  gchar *user_locale;
+
   g_test_init (&argc, &argv, NULL);
 
-  g_test_add_func ("/search", test_search);
+  setlocale (LC_ALL, "");
+  user_locale = setlocale (LC_ALL, NULL);
+  g_debug ("Current user locale: %s", user_locale);
+
+  g_test_add_data_func ("/search/basic", basic, test_search);
+  g_test_add_data_func ("/search/composed", composed, test_search);
+  g_test_add_data_func ("/search/decomposed", decomposed, test_search);
+  g_test_add_data_func ("/search/turkish", turkish, test_search);
+  g_test_add_data_func ("/search/c_locale_unicode", c_locale_unicode, test_search);
+  g_test_add_data_func ("/search/multi_words", multi_words, test_search);
 
   return g_test_run ();
 }