Experimental CL on top of https://codereview.chromium.org/1812673005/

test/intl/general/case-mapping.js

Index: test/intl/general/case-mapping.js
diff --git a/test/intl/general/case-mapping.js b/test/intl/general/case-mapping.js
index 814c16bac4ff3ac677c2563459c921cff9b0d48f..63892c2800c73d18c2d86d61f5606ca35fdbd959 100644
--- a/test/intl/general/case-mapping.js
+++ b/test/intl/general/case-mapping.js
@@ -1,4 +1,4 @@
-// Copyright 2015 the V8 project authors. All rights reserved.
+// Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -8,7 +8,6 @@ assertEquals("𐐘", "𐑀".toUpperCase());
 assertEquals("𐑀", "𐐘".toLowerCase());
 assertEquals("σ", "Σ".toLowerCase());
 
-
 // Some different paths in the ICU case conversion fastpath
 
 assertEquals("σς", "\u03A3\u03A3".toLowerCase());
@@ -25,9 +24,41 @@ assertEquals("aü", "AÜ".toLowerCase());
 // Starts with fastpath, but switches to full Unicode path
 // U+00FF is uppercased to U+0178.
 assertEquals("AŸ", "aÿ".toUpperCase());
+// U+00B5 (µ) is uppercased to U+039C (Μ)
+assertEquals("AΜ", "aµ".toUpperCase());
 // Buffer size increase
-assertEquals("CSSBẶ", "c\u00DFbặ".toUpperCase());
+assertEquals("CSSBẶ", "cßbặ".toUpperCase());
 assertEquals("FIFLFFIFFL", "\uFB01\uFB02\uFB03\uFB04".toUpperCase());
+// Buffer size decrease with a single locale or locale list.
+// In Turkic (tr, az), U+0307 preceeded by Capital Letter I is dropped.
+assertEquals("abci", "aBcI\u0307".toLocaleLowerCase("tr"));
+assertEquals("abci", "aBcI\u0307".toLocaleLowerCase("az"));
+assertEquals("abci", "aBcI\u0307".toLocaleLowerCase(["tr", "en"]));
+// English locale keeps U+0307 (combining dot above).
+assertEquals("abci\u0307", "aBcI\u0307".toLocaleLowerCase("en"));
+assertEquals("abci\u0307", "aBcI\u0307".toLocaleLowerCase(["en", "tr"]));
+// Greek uppercasing: not covered by intl402/String/*, yet. Tonos (U+0301) and
+// other diacritic marks are dropped. This rule is based on the current CLDR's
+// el-Upper transformation, but Greek uppercasing rules are more sophisticated
+// than this. See http://bugs.icu-project.org/trac/ticket/10582 and
+// http://unicode.org/cldr/trac/ticket/7905 .
+assertEquals("Α", "α\u0301".toLocaleUpperCase("el"));
+assertEquals("Α", "α\u0301".toLocaleUpperCase("el-GR"));
+assertEquals("Α", "α\u0301".toLocaleUpperCase("el-Grek"));
+assertEquals("Α", "α\u0301".toLocaleUpperCase("el-Grek-GR"));
+assertEquals("Α", "ά".toLocaleUpperCase("el"));
+assertEquals("ΑΟΥΩ", "άόύώ".toLocaleUpperCase("el"));
+assertEquals("ΑΟΥΩ", "α\u0301ο\u0301υ\u0301ω\u0301".toLocaleUpperCase("el"));
+assertEquals("ΑΟΥΩ", "άόύώ".toLocaleUpperCase("el"));
+assertEquals("ΟΕ", "Ό\u1f15".toLocaleUpperCase("el"));
+assertEquals("ΟΕ", "Ο\u0301ε\u0314\u0301".toLocaleUpperCase("el"));
+
+// In other locales, U+0301 is preserved.
+assertEquals("Α\u0301Ο\u0301Υ\u0301Ω\u0301",
+             "α\u0301ο\u0301υ\u0301ω\u0301".toLocaleUpperCase("en"));
+assertEquals("Α\u0301Ο\u0301Υ\u0301Ω\u0301",
+             "α\u0301ο\u0301υ\u0301ω\u0301".toUpperCase());
+
 // Plane 1; Deseret and Warang Citi Script.
 assertEquals("\u{10400}\u{118A0}", "\u{10428}\u{118C0}".toUpperCase());
 assertEquals("\u{10428}\u{118C0}", "\u{10400}\u{118A0}".toLowerCase());