Add corelib tests

test/codegen/corelib/bool_from_environment_test.dart

Index: test/codegen/corelib/bool_from_environment_test.dart
diff --git a/test/codegen/corelib/bool_from_environment_test.dart b/test/codegen/corelib/bool_from_environment_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..5d01bde0994a765c972608ad99f12c941e25cb15
--- /dev/null
+++ b/test/codegen/corelib/bool_from_environment_test.dart
@@ -0,0 +1,15 @@
+// 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.
+// SharedOptions=-Da=true -Db=false -Dc=NOTBOOL -Dd=True
+
+import "package:expect/expect.dart";
+
+main() {
+  Expect.isTrue(const bool.fromEnvironment('a'));
+  Expect.isFalse(const bool.fromEnvironment('b'));
+  Expect.isTrue(const bool.fromEnvironment('c', defaultValue: true));
+  Expect.isFalse(const bool.fromEnvironment('c', defaultValue: false));
+  Expect.isFalse(const bool.fromEnvironment('d', defaultValue: false));
+  Expect.equals(const bool.fromEnvironment('dart.isVM'), !identical(1.0, 1));
+}