test/java/lang/String/ToLowerCase.java

@@ -21,11 +21,11 @@
  * questions.
  */
 
 /*
     @test
-    @bug 4217441 4533872 4900935 8020037 8032012 8041791 8042589
+    @bug 4217441 4533872 4900935 8020037 8032012 8041791 8042589 8054307
     @summary toLowerCase should lower-case Greek Sigma correctly depending
              on the context (final/non-final).  Also it should handle
              Locale specific (lt, tr, and az) lowercasings and supplementary
              characters correctly.
 */

@@ -132,13 +132,59 @@
             src.appendCodePoint(cp);
             exp.appendCodePoint(lowerCase);
         }
         test(src.toString(), Locale.US, exp.toString());
 
+        // test latin1
+        src = new StringBuilder(0x100);
+        exp = new StringBuilder(0x100);
+        for (int cp = 0; cp < 0x100; cp++) {
+            int lowerCase = Character.toLowerCase(cp);
+            if (lowerCase == -1) {    //Character.ERROR
+                continue;
+            }
+            src.appendCodePoint(cp);
+            exp.appendCodePoint(lowerCase);
+        }
+        test(src.toString(), Locale.US, exp.toString());
+
+        // test non-latin1 -> latin1
+        src = new StringBuilder(0x100).append("abc");
+        exp = new StringBuilder(0x100).append("abc");
+        for (int cp = 0x100; cp < 0x10000; cp++) {
+            int lowerCase  = Character.toLowerCase(cp);
+            if (lowerCase < 0x100 && cp != '\u0130') {
+                src.appendCodePoint(cp);
+                exp.appendCodePoint(lowerCase);
+            }
+        }
+        test(src.toString(), Locale.US, exp.toString());
     }
 
     static void test(String in, Locale locale, String expected) {
+        test0(in, locale,expected);
+        for (String[] ss :  new String[][] {
+                                new String[] {"abc",      "abc"},
+                                new String[] {"aBc",      "abc"},
+                                new String[] {"ABC",      "abc"},
+                                new String[] {"ab\u4e00", "ab\u4e00"},
+                                new String[] {"aB\u4e00", "ab\u4e00"},
+                                new String[] {"AB\u4e00", "ab\u4e00"},
+                                new String[] {"ab\uD800\uDC00", "ab\uD800\uDC00"},
+                                new String[] {"aB\uD800\uDC00", "ab\uD800\uDC00"},
+                                new String[] {"AB\uD800\uDC00", "ab\uD800\uDC00"},
+                                new String[] {"ab\uD801\uDC1C", "ab\uD801\uDC44"},
+                                new String[] {"aB\uD801\uDC1C", "ab\uD801\uDC44"},
+                                new String[] {"AB\uD801\uDC1C", "ab\uD801\uDC44"},
+
+                            }) {
+            test0(ss[0] + " " + in, locale, ss[1] + " " + expected);
+            test0(in + " " + ss[0], locale, expected + " " + ss[1]);
+        }
+    }
+
+    static void test0(String in, Locale locale, String expected) {
         String result = in.toLowerCase(locale);
         if (!result.equals(expected)) {
             System.err.println("input: " + in + ", locale: " + locale +
                     ", expected: " + expected + ", actual: " + result);
             throw new RuntimeException();