// Copyright (c) 2011 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 "webkit/plugins/ppapi/ppapi_unittest.h"

#include "ppapi/c/pp_var.h"
#include "ppapi/c/ppp_instance.h"
#include "webkit/plugins/ppapi/mock_plugin_delegate.h"
#include "webkit/plugins/ppapi/plugin_module.h"
#include "webkit/plugins/ppapi/ppapi_interface_factory.h"
#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"

namespace webkit {
namespace ppapi {

namespace {

PpapiUnittest* current_unittest = NULL;

const void* MockGetInterface(const char* interface_name) {
  return current_unittest->GetMockInterface(interface_name);
}

int MockInitializeModule(PP_Module, PPB_GetInterface) {
  return PP_OK;
}

// PPP_Instance implementation ------------------------------------------------

PP_Bool Instance_DidCreate(PP_Instance pp_instance,
                           uint32_t argc,
                           const char* argn[],
                           const char* argv[]) {
  return PP_TRUE;
}

void Instance_DidDestroy(PP_Instance instance) {
}

void Instance_DidChangeView(PP_Instance pp_instance, PP_Resource view) {
}

void Instance_DidChangeFocus(PP_Instance pp_instance, PP_Bool has_focus) {
}

PP_Bool Instance_HandleDocumentLoad(PP_Instance pp_instance,
                                    PP_Resource pp_url_loader) {
  return PP_FALSE;
}

static PPP_Instance mock_instance_interface = {
  &Instance_DidCreate,
  &Instance_DidDestroy,
  &Instance_DidChangeView,
  &Instance_DidChangeFocus,
  &Instance_HandleDocumentLoad
};

}  // namespace

// PpapiUnittest --------------------------------------------------------------

PpapiUnittest::PpapiUnittest() {
  DCHECK(!current_unittest);
  current_unittest = this;
}

PpapiUnittest::~PpapiUnittest() {
  DCHECK(current_unittest == this);
  current_unittest = NULL;
}

void PpapiUnittest::SetUp() {
  delegate_.reset(NewPluginDelegate());

  // Initialize the mock module.
  module_ = new PluginModule("Mock plugin", FilePath(), this);
  PluginModule::EntryPoints entry_points;
  entry_points.get_interface = &MockGetInterface;
  entry_points.initialize_module = &MockInitializeModule;
  ASSERT_TRUE(module_->InitAsInternalPlugin(entry_points));

  // Initialize the mock instance.
  instance_ = PluginInstance::Create1_0(
      delegate_.get(),
      module(),
      GetMockInterface(PPP_INSTANCE_INTERFACE_1_0));

}

void PpapiUnittest::TearDown() {
  instance_ = NULL;
  module_ = NULL;
}

MockPluginDelegate* PpapiUnittest::NewPluginDelegate() {
  return new MockPluginDelegate;
}

const void* PpapiUnittest::GetMockInterface(const char* interface_name) const {
  if (strcmp(interface_name, PPP_INSTANCE_INTERFACE_1_0) == 0)
    return &mock_instance_interface;
  return NULL;
}

void PpapiUnittest::ShutdownModule() {
  DCHECK(instance_->HasOneRef());
  instance_ = NULL;
  DCHECK(module_->HasOneRef());
  module_ = NULL;
}

void PpapiUnittest::PluginModuleDead(PluginModule* /* dead_module */) {
  // Nothing needed (this is necessary to make the module compile).
}

// Tests whether custom PPAPI interface factories are called when PPAPI
// interfaces are requested.
class PpapiCustomInterfaceFactoryTest
    : public testing::Test,
      public webkit::ppapi::PluginDelegate::ModuleLifetime {
 public:
  PpapiCustomInterfaceFactoryTest() {}
  virtual ~PpapiCustomInterfaceFactoryTest() {}

  bool result() {
    return result_;
  }

  void reset_result() {
    result_ = false;
  }

  static const void* InterfaceFactory(const std::string& interface_name) {
    result_ = true;
    return NULL;
  }

 private:
  static bool result_;
  // ModuleLifetime implementation.
  virtual void PluginModuleDead(PluginModule* dead_module) {}
};

bool PpapiCustomInterfaceFactoryTest::result_ = false;

// This test validates whether custom PPAPI interface factories are invoked in
// response to PluginModule::GetPluginInterface calls.
TEST_F(PpapiCustomInterfaceFactoryTest, BasicFactoryTest) {
  PpapiInterfaceFactoryManager::GetInstance()->RegisterFactory(
      PpapiCustomInterfaceFactoryTest::InterfaceFactory);
  (*PluginModule::GetLocalGetInterfaceFunc())("DummyInterface");
  EXPECT_TRUE(result());

  reset_result();
  PpapiInterfaceFactoryManager::GetInstance()->UnregisterFactory(
      PpapiCustomInterfaceFactoryTest::InterfaceFactory);

  (*PluginModule::GetLocalGetInterfaceFunc())("DummyInterface");
  EXPECT_FALSE(result());
}

}  // namespace ppapi
}  // namespace webkit