New APIs for external byte arrays

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 "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
 #include "platform/utils.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart_api_impl.h"
@@ skipping 792 matching lines @@
   // Check if we get an exception when accessing beyond limit.
   result = Dart_ListGetAt(ListAccessTestObj, 4);
   EXPECT(Dart_IsError(result));
 }
 
 
 TEST_CASE(ByteArrayAccess) {
   Dart_Handle byte_array1 = Dart_NewByteArray(10);
   EXPECT_VALID(byte_array1);
   EXPECT(Dart_IsByteArray(byte_array1));
+  EXPECT(!Dart_IsByteArrayExternal(byte_array1));
   EXPECT(Dart_IsList(byte_array1));
 
   intptr_t length = 0;
   Dart_Handle result = Dart_ListLength(byte_array1, &length);
   EXPECT_VALID(result);
   EXPECT_EQ(10, length);
 
   result = Dart_ListSetAt(byte_array1, -1, Dart_NewInteger(1));
   EXPECT(Dart_IsError(result));
   result = Dart_ByteArraySetUint8At(byte_array1, -1, 1);
@@ skipping 273 matching lines @@
 }
 
 
 TEST_CASE(ExternalByteArrayAccess) {
   uint8_t data[] = { 0, 11, 22, 33, 44, 55, 66, 77 };
   intptr_t data_length = ARRAY_SIZE(data);
 
   Dart_Handle obj = Dart_NewExternalByteArray(data, data_length, NULL, NULL);
   EXPECT_VALID(obj);
   EXPECT(Dart_IsByteArray(obj));
+  EXPECT(Dart_IsByteArrayExternal(obj));
   EXPECT(Dart_IsList(obj));
 
+  void* raw_data = NULL;
+  EXPECT_VALID(Dart_ExternalByteArrayGetData(obj, &raw_data));
+  EXPECT(raw_data == data);
+
   void* peer = &data;  // just a non-NULL value
   EXPECT_VALID(Dart_ExternalByteArrayGetPeer(obj, &peer));
   EXPECT(peer == NULL);
 
   intptr_t list_length = 0;
   EXPECT_VALID(Dart_ListLength(obj, &list_length));
   EXPECT_EQ(data_length, list_length);
 
   // Load and check values from underlying array and API.
   for (intptr_t i = 0; i < list_length; ++i) {
@@ skipping 6064 matching lines @@
     EXPECT(o2 == reinterpret_cast<void*>(&p2));
   }
   Dart_ExitScope();
   isolate->heap()->CollectGarbage(Heap::kOld);
   EXPECT_EQ(0, isolate->heap()->PeerCount());
 }
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart