// Copyright (c) 2015 The Chromium 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 "third_party/blink/renderer/bindings/core/v8/v8_binding_for_testing.h"

#include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/settings.h"
#include "third_party/blink/renderer/core/testing/dummy_page_holder.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"

namespace blink {

std::unique_ptr<DummyPageHolder> V8TestingScope::CreateDummyPageHolder(
    const KURL& url) {
  std::unique_ptr<DummyPageHolder> holder = std::make_unique<DummyPageHolder>();
  if (url.IsValid()) {
    holder->GetFrame().Loader().CommitNavigation(
        WebNavigationParams::CreateWithHTMLBufferForTesting(
            SharedBuffer::Create(), url),
        nullptr /* extra_data */);
    blink::test::RunPendingTasks();
  }
  return holder;
}

V8TestingScope::V8TestingScope(const KURL& url)
    : holder_(CreateDummyPageHolder(url)),
      handle_scope_(GetIsolate()),
      context_(GetScriptState()->GetContext()),
      context_scope_(GetContext()),
      try_catch_(GetIsolate()) {
  GetFrame().GetSettings()->SetScriptEnabled(true);
}

ScriptState* V8TestingScope::GetScriptState() const {
  return ToScriptStateForMainWorld(holder_->GetDocument().GetFrame());
}

ExecutionContext* V8TestingScope::GetExecutionContext() const {
  return ExecutionContext::From(GetScriptState());
}

v8::Isolate* V8TestingScope::GetIsolate() const {
  return GetScriptState()->GetIsolate();
}

v8::Local<v8::Context> V8TestingScope::GetContext() const {
  return context_;
}

ExceptionState& V8TestingScope::GetExceptionState() {
  return exception_state_;
}

Page& V8TestingScope::GetPage() {
  return holder_->GetPage();
}

LocalFrame& V8TestingScope::GetFrame() {
  return holder_->GetFrame();
}

LocalDOMWindow& V8TestingScope::GetWindow() {
  return *GetFrame().DomWindow();
}

Document& V8TestingScope::GetDocument() {
  return holder_->GetDocument();
}

V8TestingScope::~V8TestingScope() {
  // Execute all pending microtasks.
  // The document can be manually shut down here, so we cannot use GetIsolate()
  // which relies on the active document.
  v8::MicrotasksScope::PerformCheckpoint(GetContext()->GetIsolate());

  // TODO(yukishiino): We put this statement here to clear an exception from
  // the isolate.  Otherwise, the leak detector complains.  Really mysterious
  // hack.
  v8::Function::New(GetContext(), nullptr);
}

}  // namespace blink