Add corelib tests

test/codegen/corelib/from_environment_const_type_undefined_test.dart

Index: test/codegen/corelib/from_environment_const_type_undefined_test.dart
diff --git a/test/codegen/corelib/from_environment_const_type_undefined_test.dart b/test/codegen/corelib/from_environment_const_type_undefined_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..dd89c831173fc22c5783c4328db9cde771b7b44a
--- /dev/null
+++ b/test/codegen/corelib/from_environment_const_type_undefined_test.dart
@@ -0,0 +1,42 @@
+// Copyright (c) 2014, 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";
+
+class Foo {}
+
+const
+    bool   /// 01: ok
+    int    /// 02: static type warning, checked mode compile-time error
+    String /// 03: static type warning, checked mode compile-time error
+    Foo    /// 04: static type warning, checked mode compile-time error
+    a = const bool.fromEnvironment('a');
+
+const
+    bool   /// 05: ok
+    int    /// 06: static type warning, checked mode compile-time error
+    String /// 07: static type warning, checked mode compile-time error
+    Foo    /// 08: static type warning, checked mode compile-time error
+    b = const bool.fromEnvironment('b');
+
+const
+    bool   /// 09: static type warning
+    int    /// 10: ok
+    String /// 11: static type warning
+    Foo    /// 12: static type warning
+    c = const int.fromEnvironment('c');
+
+const
+    bool   /// 13: static type warning
+    int    /// 14: static type warning
+    String /// 15: ok
+    Foo    /// 16: static type warning
+    d = const String.fromEnvironment('d');
+
+main() {
+  Expect.equals(a, false);
+  Expect.equals(b, false);
+  Expect.equals(c, null);
+  Expect.equals(d, null);
+}