Add corelib tests

test/codegen/corelib/string_trim2_test.dart

Index: test/codegen/corelib/string_trim2_test.dart
diff --git a/test/codegen/corelib/string_trim2_test.dart b/test/codegen/corelib/string_trim2_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..11379dd77618014c9e72034e4216053b2fd8ee75
--- /dev/null
+++ b/test/codegen/corelib/string_trim2_test.dart
@@ -0,0 +1,49 @@
+// Copyright (c) 2013, 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";
+
+const WHITESPACE = const [
+  0x09,
+  0x0A,
+  0x0B,
+  0x0C,
+  0x0D,
+  0x20,
+  0x85,
+  0xA0,
+  0x1680,
+  0x180E,
+  0x2000,
+  0x2001,
+  0x2002,
+  0x2003,
+  0x2004,
+  0x2005,
+  0x2006,
+  0x2007,
+  0x2008,
+  0x2009,
+  0x200A,
+  0x202F,
+  0x205F,
+  0x3000,
+  0x2028,
+  0x2029,
+  0xFEFF,
+];
+
+main() {
+  for (var ws in WHITESPACE) {
+    var name = ws.toRadixString(16);
+    var c = new String.fromCharCode(ws);
+    Expect.equals("", c.trim(), "$name");
+    Expect.equals("a", ("a" + c).trim(), "a-$name");
+    Expect.equals("a", (c + "a").trim(), "$name-a");
+    Expect.equals("a", (c + c + "a" + c + c).trim(), "$name around");
+    Expect.equals("a" + c + "a", (c + c + "a" + c + "a" + c + c).trim(),
+                  "$name many");
+  }
+  Expect.equals("", new String.fromCharCodes(WHITESPACE).trim(), "ALL");
+}