Test for immutable Lists in ListSet API methods.

tests/standalone/src/ReadIntoConstList.dart

Index: tests/standalone/src/ReadIntoConstList.dart
diff --git a/tests/standalone/src/ReadIntoConstList.dart b/tests/standalone/src/ReadIntoConstList.dart
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+++ b/tests/standalone/src/ReadIntoConstList.dart
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+// 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.
+
+// Regression test for missing immutability check in the ListSet
+// methods in the API. This allowed overwriting const Lists.
+
+String getFilename(String path) =>
+    new File(path).existsSync() ? path : 'runtime/' + path;
+
+void main() {
+  var a = const [0];
+  var b = const [0];
+  Expect.isTrue(a === b);
+  
+  String filename = getFilename("bin/file_test.cc");
+  File file = new File(filename);
+  FileInputStream input = file.openInputStream();
+  try {
+    input.readInto(a, 0, 1);
+    Expect.fail("no exception thrown");
+  } catch (var e) {
+    Expect.isTrue(e is FileIOException);
+  }
+  Expect.equals(0, a[0]);
+  Expect.equals(0, b[0]);
+}