test rename overhaul: step 7 - corelib tests

tests/corelib/src/StringCaseTest.dart

-// 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.
-
-class StringCaseTest {
-
-  static testMain() {
-    testLowerUpper();
-  }
-
-  static 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());
-  }
-}
-
-main() {
-  StringCaseTest.testMain();
-}