1 files changed, 23 insertions, 0 deletions
diff --git a/services/tests/servicestests/src/com/android/server/inputmethod/LocaleUtilsTest.java b/services/tests/servicestests/src/com/android/server/inputmethod/LocaleUtilsTest.java
index 255cb6499d8a..26a2bee8cf68 100644
--- a/services/tests/servicestests/src/com/android/server/inputmethod/LocaleUtilsTest.java
+++ b/services/tests/servicestests/src/com/android/server/inputmethod/LocaleUtilsTest.java
@@ -357,6 +357,29 @@ public class LocaleUtilsTest {
             assertEquals(1, dest.size());
             assertEquals(availableLocales.get(0), dest.get(0));  // "sr-Latn-RS"
         }
+        // Locale with deprecated subtag, e.g. CS for Serbia and Montenegro, should not win
+        // even if the other available locale doesn't have explicit script / country.
+        // On Android, users don't normally use deprecated subtags unless the application requests.
+        {
+            final LocaleList preferredLocales = LocaleList.forLanguageTags("sr-RS");
+            final ArrayList<Locale> availableLocales = new ArrayList<>();
+            availableLocales.add(Locale.forLanguageTag("sr-Cyrl-CS"));
+            availableLocales.add(Locale.forLanguageTag("sr-RS"));
+            final ArrayList<Locale> dest = new ArrayList<>();
+            LocaleUtils.filterByLanguage(availableLocales, sIdentityMapper, preferredLocales, dest);
+            assertEquals(1, dest.size());
+            assertEquals(availableLocales.get(1), dest.get(0));  // "sr-RS"
+        }
+        {
+            final LocaleList preferredLocales = LocaleList.forLanguageTags("sr-RS");
+            final ArrayList<Locale> availableLocales = new ArrayList<>();
+            availableLocales.add(Locale.forLanguageTag("sr-Cyrl-CS"));
+            availableLocales.add(Locale.forLanguageTag("sr"));
+            final ArrayList<Locale> dest = new ArrayList<>();
+            LocaleUtils.filterByLanguage(availableLocales, sIdentityMapper, preferredLocales, dest);
+            assertEquals(1, dest.size());
+            assertEquals(availableLocales.get(1), dest.get(0));  // "sr"
+        }
     }
 
     @Test