Added tests for uncovered TimeZoneNames methods.

Bug: 22023363
Change-Id: I327ae2447dd036bf0ac82240754d8d351efac01a

1 files changed, 84 insertions, 0 deletions

diff --git a/android_icu4j/cts-coverage/src/main/tests/android/icu/cts/coverage/text/TimeZoneNamesTest.java b/android_icu4j/cts-coverage/src/main/tests/android/icu/cts/coverage/text/TimeZoneNamesTest.java
index 5af46b94f..577633b5a 100644
--- a/android_icu4j/cts-coverage/src/main/tests/android/icu/cts/coverage/text/TimeZoneNamesTest.java
+++ b/android_icu4j/cts-coverage/src/main/tests/android/icu/cts/coverage/text/TimeZoneNamesTest.java
@@ -16,7 +16,9 @@
 package android.icu.cts.coverage.text;
 
 import android.icu.text.TimeZoneNames;
+import android.icu.util.TimeZone;
 import android.icu.util.ULocale;
+import java.util.Collections;
 import java.util.Locale;
 import java.util.Set;
 import org.junit.Test;
@@ -24,9 +26,14 @@ import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
 
 /**
  * Extra tests to improve CTS Test Coverage.
+ *
+ * Where necessary (i.e. when a method is abstract) it tests the implementations of TimeZoneNames;
+ * excluding the default one which shouldn't be used on Android.
  */
 @RunWith(JUnit4.class)
 public class TimeZoneNamesTest {
@@ -48,4 +55,81 @@ public class TimeZoneNamesTest {
             assertEquals("Id: " + availableId, uLocaleName, localeName);
         }
     }
+
+    @Test
+    public void testGetAvailableMetaZoneIDs() {
+        TimeZoneNames japaneseNames = TimeZoneNames.getInstance(ULocale.JAPANESE);
+        Set<String> allJapan = japaneseNames.getAvailableMetaZoneIDs();
+
+        TimeZoneNames tzdbNames = TimeZoneNames.getTZDBInstance(ULocale.CHINESE);
+        Set<String> tzdbAll = tzdbNames.getAvailableMetaZoneIDs();
+
+        // The data is the same in the current implementation.
+        assertEquals(allJapan, tzdbAll);
+
+        // Make sure that there is something.
+        assertTrue("count of zone ids is less than 100", allJapan.size() >= 180);
+    }
+
+    @Test
+    public void testGetAvailableMetaZoneIDs_String() {
+        TimeZoneNames japaneseNames = TimeZoneNames.getInstance(ULocale.JAPANESE);
+        assertEquals(Collections.singleton("America_Pacific"),
+                japaneseNames.getAvailableMetaZoneIDs("America/Los_Angeles"));
+
+        TimeZoneNames tzdbNames = TimeZoneNames.getTZDBInstance(ULocale.CHINESE);
+        assertEquals(Collections.singleton("Taipei"),
+                tzdbNames.getAvailableMetaZoneIDs("Asia/Taipei"));
+    }
+
+    @Test
+    public void testGetMetaZoneDisplayName() {
+        TimeZoneNames usNames = TimeZoneNames.getInstance(ULocale.US);
+
+        String europeanCentralName = usNames.getMetaZoneDisplayName("Europe_Central",
+                TimeZoneNames.NameType.LONG_STANDARD);
+        assertEquals("Central European Standard Time", europeanCentralName);
+
+        TimeZoneNames tzdbNames = TimeZoneNames.getTZDBInstance(ULocale.CHINESE);
+        String americaPacificName = tzdbNames.getMetaZoneDisplayName("America_Pacific",
+                TimeZoneNames.NameType.SHORT_DAYLIGHT);
+        assertEquals("PDT", americaPacificName);
+    }
+
+    @Test
+    public void testGetMetaZoneID() {
+        TimeZoneNames usNames = TimeZoneNames.getInstance(ULocale.US);
+
+        String europeanCentralName = usNames.getMetaZoneID("Europe/Paris", 0);
+        assertEquals("Europe_Central", europeanCentralName);
+
+        TimeZoneNames tzdbNames = TimeZoneNames.getTZDBInstance(ULocale.KOREAN);
+        String seoulName = tzdbNames.getMetaZoneID("Asia/Seoul", 0);
+        assertEquals("Korea", seoulName);
+
+        // Now try Jan 1st 1945 GMT
+        seoulName = tzdbNames.getMetaZoneID("Asia/Seoul", -786240000000L);
+        assertNull(seoulName);
+    }
+
+    @Test
+    public void testGetTimeZoneDisplayName() {
+        TimeZoneNames frenchNames = TimeZoneNames.getInstance(ULocale.FRENCH);
+        String dublinName = frenchNames.getTimeZoneDisplayName("Europe/Dublin",
+                TimeZoneNames.NameType.LONG_DAYLIGHT);
+        assertEquals("heure d’été irlandaise", dublinName);
+
+        String dublinLocation = frenchNames.getTimeZoneDisplayName("Europe/Dublin",
+                TimeZoneNames.NameType.EXEMPLAR_LOCATION);
+        assertEquals("Dublin", dublinLocation);
+
+        // All the names returned by this are null.
+        TimeZoneNames tzdbNames = TimeZoneNames.getTZDBInstance(ULocale.KOREAN);
+        for (String tzId : TimeZone.getAvailableIDs()) {
+            for (TimeZoneNames.NameType nameType : TimeZoneNames.NameType.values()) {
+                String name = tzdbNames.getTimeZoneDisplayName(tzId, nameType);
+                assertNull("TZ:" + tzId + ", NameType: " + nameType + ", value: " + name, name);
+            }
+        }
+    }
 }