Add corelib tests

test/codegen/corelib/string_base_vm_test.dart

Index: test/codegen/corelib/string_base_vm_test.dart
diff --git a/test/codegen/corelib/string_base_vm_test.dart b/test/codegen/corelib/string_base_vm_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..e8922fe9604529ea4b4e1e09e1d1420707ed1d17
--- /dev/null
+++ b/test/codegen/corelib/string_base_vm_test.dart
@@ -0,0 +1,83 @@
+// Copyright (c) 2012, 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.
+// Dart test program for testing class 'StringBase' (currently VM specific).
+
+library string_base_test;
+import "package:expect/expect.dart";
+
+class StringBaseTest {
+
+  StringBaseTest() {}
+
+  toString() {
+    return "StringBase Tester";
+  }
+
+  static testInterpolation() {
+    var answer = 40 + 2;
+    var s = "The answer is $answer.";
+    Expect.equals("The answer is 42.", s);
+
+    int numBottles = 33;
+    String wall = "wall";
+    s = "${numBottles*3} bottles of beer on the $wall.";
+    Expect.equals("99 bottles of beer on the wall.", s);
+  }
+
+  static testCreation() {
+    String s = "Hello";
+    List<int> a = new List(s.length);
+    List<int> ga  = new List();
+    bool exception_caught = false;
+    for (int i = 0; i < a.length; i++) {
+      a[i] = s.codeUnitAt(i);
+      ga.add(s.codeUnitAt(i));
+    }
+    try {
+      String s4 = new String.fromCharCodes([0.0]);
+    } on ArgumentError catch (ex) {
+      exception_caught = true;
+    } on TypeError catch (ex) {
+      exception_caught = true;
+    }
+    Expect.equals(true, exception_caught);
+    exception_caught = false;
+    try {
+      String s4 = new String.fromCharCodes([-1]);
+    } on ArgumentError catch (ex) {
+      exception_caught = true;
+    }
+    Expect.equals(true, exception_caught);
+  }
+
+  static testSubstring() {
+    String s = "Hello World";
+    Expect.equals("World", s.substring(6, s.length));
+    Expect.equals("", s.substring(8, 8));
+    bool exception_caught = false;
+    try {
+      s.substring(5, 12);
+    } on RangeError catch (ex) {
+      exception_caught = true;
+    }
+    Expect.equals(true, exception_caught);
+    exception_caught = false;
+    try {
+      s.substring(5, 4);
+    } on RangeError catch (ex) {
+      exception_caught = true;
+    }
+    Expect.equals(true, exception_caught);
+  }
+
+  static void testMain() {
+    testInterpolation();
+    testCreation();
+    testSubstring();
+  }
+}
+
+main() {
+  StringBaseTest.testMain();
+}