Expose ArrayBufferView::HasBuffer

test/cctest/test-typedarrays.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 
 #include "src/v8.h"
 #include "test/cctest/cctest.h"
 
 #include "src/api.h"
 #include "src/heap/heap.h"
 #include "src/objects.h"
 
 using namespace v8::internal;
 
 void TestArrayBufferViewContents(LocalContext& env, bool should_use_buffer) {
   v8::Local<v8::Object> obj_a =
       v8::Local<v8::Object>::Cast(env->Global()->Get(v8_str("a")));
   CHECK(obj_a->IsArrayBufferView());
   v8::Local<v8::ArrayBufferView> array_buffer_view =
       v8::Local<v8::ArrayBufferView>::Cast(obj_a);
-  Handle<JSArrayBufferView> internal_view(
-      v8::Utils::OpenHandle(*array_buffer_view));
-  bool has_buffer = true;
-  if (internal_view->IsJSTypedArray()) {
-    Handle<JSTypedArray> typed_array(JSTypedArray::cast(*internal_view));
-    has_buffer = !typed_array->buffer()->IsSmi();
-  }
-  CHECK_EQ(has_buffer, should_use_buffer);
+  CHECK_EQ(array_buffer_view->HasBuffer(), should_use_buffer);
   unsigned char contents[4] = {23, 23, 23, 23};
   CHECK_EQ(sizeof(contents),
            array_buffer_view->CopyContents(contents, sizeof(contents)));
-  if (!has_buffer) {
-    CHECK(internal_view->IsJSTypedArray());
-    Handle<JSTypedArray> typed_array(JSTypedArray::cast(*internal_view));
-    CHECK(typed_array->buffer()->IsSmi());
-  }
+  CHECK_EQ(array_buffer_view->HasBuffer(), should_use_buffer);
   for (size_t i = 0; i < sizeof(contents); ++i) {
     CHECK_EQ(i, contents[i]);
   }
 }
 
 
 TEST(CopyContentsTypedArray) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
   CompileRun(
@@ skipping 22 matching lines @@
       "var c = new Uint8Array(b);"
       "c[0] = -1;"
       "c[1] = -1;"
       "c[2] = 0;"
       "c[3] = 1;"
       "c[4] = 2;"
       "c[5] = 3;"
       "var a = new DataView(b, 2);");
   TestArrayBufferViewContents(env, true);
 }