Make Dart API Dart_IsTypedData work for typed data views

runtime/vm/dart_api_impl_test.cc

 // 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.
 
 #include "bin/builtin.h"
 #include "include/dart_api.h"
 #include "include/dart_debugger_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
@@ skipping 1399 matching lines @@
   for (intptr_t i = 0; i < kSize; ++i) {
     EXPECT_EQ(i & 0xff, data[i]);
   }
 
   Dart_Handle result = Dart_ListGetAsBytes(view_obj, 0, data, kSize + 1);
   EXPECT(Dart_IsError(result));
   delete[] data;
 }
 
 
+TEST_CASE(TypedDataViewListIsTypedData) {
+  const int kSize = 1000;
+
+  const char* kScriptChars =
+      "import 'dart:typed_data';\n"
+      "List main(int size) {\n"
+      "  var a = new Int8List(size);\n"
+      "  var view = new Int8List.view(a.buffer, 0, size);\n"
+      "  return view;\n"
+      "}\n";
+  // Create a test library and Load up a test script in it.
+  Dart_Handle lib = TestCase::LoadTestScript(kScriptChars, NULL);
+
+  // Create a typed data view object.
+  Dart_Handle dart_args[1];
+  dart_args[0] = Dart_NewInteger(kSize);
+  Dart_Handle view_obj = Dart_Invoke(lib, NewString("main"), 1, dart_args);
+  EXPECT_VALID(view_obj);
+  // Test that the API considers it a TypedData object.
+  EXPECT(Dart_IsTypedData(view_obj));
+}
+
+
 TEST_CASE(TypedDataAccess) {
   EXPECT_EQ(Dart_TypedData_kInvalid,
             Dart_GetTypeOfTypedData(Dart_True()));
   EXPECT_EQ(Dart_TypedData_kInvalid,
             Dart_GetTypeOfExternalTypedData(Dart_False()));
   Dart_Handle byte_array1 = Dart_NewTypedData(Dart_TypedData_kUint8, 10);
   EXPECT_VALID(byte_array1);
   EXPECT_EQ(Dart_TypedData_kUint8,
             Dart_GetTypeOfTypedData(byte_array1));
   EXPECT_EQ(Dart_TypedData_kInvalid,
@@ skipping 7213 matching lines @@
                                    NewString("main"),
                                    1,
                                    dart_args);
   int64_t value = 0;
   result = Dart_IntegerToInt64(result, &value);
   EXPECT_VALID(result);
   EXPECT_EQ(6, value);
 }
 
 }  // namespace dart