Add corelib tests

test/codegen/corelib/string_case_test.dart

Index: test/codegen/corelib/string_case_test.dart
diff --git a/test/codegen/corelib/string_case_test.dart b/test/codegen/corelib/string_case_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..d6c140d054b3f9fb9351577ac91d628bbb1da2c3
--- /dev/null
+++ b/test/codegen/corelib/string_case_test.dart
@@ -0,0 +1,55 @@
+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import "package:expect/expect.dart";
+
+main() {
+  testLowerUpper();
+  testSpecialCases();
+}
+
+void testLowerUpper() {
+  var a = "Stop! Smell the Roses.";
+  var allLower = "stop! smell the roses.";
+  var allUpper = "STOP! SMELL THE ROSES.";
+  Expect.equals(allUpper, a.toUpperCase());
+  Expect.equals(allLower, a.toLowerCase());
+}
+
+void testSpecialCases() {
+  // Letters in Latin-1 where the upper case is not in Latin-1.
+
+  // German sharp s. Upper case variant is "SS".
+  Expect.equals("SS", "\xdf".toUpperCase());                  /// 01: ok
+  Expect.equals("\xdf", "\xdf".toLowerCase());
+  Expect.equals("ss", "\xdf".toUpperCase().toLowerCase());    /// 01: continued
+  // Micro sign (not same as lower-case Greek letter mu, U+03BC).
+  Expect.equals("\u039c", "\xb5".toUpperCase());              /// 02: ok
+  Expect.equals("\xb5", "\xb5".toLowerCase());
+  Expect.equals("\u03Bc",                                     /// 02: continued
+                "\xb5".toUpperCase().toLowerCase());          /// 02: continued
+  // Small letter y diaresis.
+  Expect.equals("\u0178", "\xff".toUpperCase());              /// 03: ok
+  Expect.equals("\xff", "\xff".toLowerCase());
+  Expect.equals("\xff", "\xff".toUpperCase().toLowerCase());  /// 03: continued
+  // Zero.
+  Expect.equals("\x00", "\x00".toLowerCase());
+  Expect.equals("\x00", "\x00".toUpperCase());
+
+  // Test all combinations of ordering of lower-case, upper-case and
+  // special-when-upper-cased characters.
+  Expect.equals("AA\u0178", "Aa\xff".toUpperCase());          /// 03: continued
+  Expect.equals("AA\u0178", "aA\xff".toUpperCase());          /// 03: continued
+  Expect.equals("A\u0178A", "A\xffa".toUpperCase());          /// 03: continued
+  Expect.equals("A\u0178A", "a\xffA".toUpperCase());          /// 03: continued
+  Expect.equals("\u0178AA", "\xffAa".toUpperCase());          /// 03: continued
+  Expect.equals("\u0178AA", "\xffaA".toUpperCase());          /// 03: continued
+
+  Expect.equals("aa\xff", "Aa\xff".toLowerCase());
+  Expect.equals("aa\xff", "aA\xff".toLowerCase());
+  Expect.equals("a\xffa", "A\xffa".toLowerCase());
+  Expect.equals("a\xffa", "a\xffA".toLowerCase());
+  Expect.equals("\xffaa", "\xffAa".toLowerCase());
+  Expect.equals("\xffaa", "\xffaA".toLowerCase());
+}