more testing

see issue #985

Author: MenoData

base/src/test/java/net/time4j/format/MandarinNumberTest.java

@@ -32,7 +32,7 @@ public void mandarin() {
             is("零〇一二兩三四五六七八九十百千"));
         assertThat(
             NumberSystem.CHINESE_MANDARIN.getCode(),
-            is("hans"));
+            is("mandarin"));
     }
 
     @Test
@@ -68,6 +68,22 @@ public void mandarin_1230() {
             is(1230));
     }
 
+    @Test
+    public void simplified_1230() {
+        assertThat(
+            NumberSystem.CHINESE_SIMPLIFIED.toNumeral(1230),
+            is("一千二百三十"));
+        assertThat(
+            NumberSystem.CHINESE_SIMPLIFIED.toInteger("一千兩百三十"),
+            is(1230));
+        assertThat(
+            NumberSystem.CHINESE_SIMPLIFIED.toInteger("一千二百三十"),
+            is(1230));
+        assertThat(
+            NumberSystem.CHINESE_SIMPLIFIED.getCode(),
+            is("hans"));
+    }
+
     @Test
     public void mandarin_1035() {
         assertThat(