Infra for running lib tests

test/codegen/lib/typed_data/byte_data_test.dart

Index: test/codegen/lib/typed_data/byte_data_test.dart
diff --git a/test/codegen/lib/typed_data/byte_data_test.dart b/test/codegen/lib/typed_data/byte_data_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..2b0e3ea354061a3230a5890b5f424ace3b6a1954
--- /dev/null
+++ b/test/codegen/lib/typed_data/byte_data_test.dart
@@ -0,0 +1,40 @@
+// 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.
+
+import 'dart:typed_data';
+import "package:expect/expect.dart";
+
+main() {
+  testRegress10898();
+}
+
+testRegress10898() {
+  ByteData data = new ByteData(16);
+  Expect.equals(16, data.lengthInBytes);
+  for (int i = 0; i < data.lengthInBytes; i++) {
+    Expect.equals(0, data.getInt8(i));
+    data.setInt8(i, 42 + i);
+    Expect.equals(42 + i, data.getInt8(i));
+  }
+
+  ByteData backing = new ByteData(16);
+  ByteData view = new ByteData.view(backing.buffer);
+  for (int i = 0; i < view.lengthInBytes; i++) {
+    Expect.equals(0, view.getInt8(i));
+    view.setInt8(i, 87 + i);
+    Expect.equals(87 + i, view.getInt8(i));
+  }
+
+  view = new ByteData.view(backing.buffer, 4);
+  Expect.equals(12, view.lengthInBytes);
+  for (int i = 0; i < view.lengthInBytes; i++) {
+    Expect.equals(87 + i + 4, view.getInt8(i));
+  }
+
+  view = new ByteData.view(backing.buffer, 8, 4);
+  Expect.equals(4, view.lengthInBytes);
+  for (int i = 0; i < view.lengthInBytes; i++) {
+    Expect.equals(87 + i + 8, view.getInt8(i));
+  }
+}