// Copyright 2014 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 "chrome/browser/ui/android/tab_model/tab_model.h"
#include "chrome/browser/ui/android/tab_model/tab_model_list.h"
#include "chrome/test/base/chrome_render_view_host_test_harness.h"
#include "chrome/test/base/testing_profile.h"
#include "content/public/browser/web_contents.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace {
class TabModelListTest : public ChromeRenderViewHostTestHarness {};
}  // namespace

class TestTabModel : public TabModel {
 public:
  explicit TestTabModel(Profile* profile) : TabModel(profile), tab_count_(0) {}

  virtual int GetTabCount() const override { return tab_count_; }
  virtual int GetActiveIndex() const override { return 0; }
  virtual content::WebContents* GetWebContentsAt(int index) const override {
    return nullptr;
  }
  virtual void CreateTab(content::WebContents* web_contents,
                         int parent_tab_id) override {}
  virtual content::WebContents* CreateNewTabForDevTools(
      const GURL& url) override {
    return nullptr;
  }
  virtual bool IsSessionRestoreInProgress() const override { return false; }
  virtual TabAndroid* GetTabAt(int index) const override { return nullptr; }
  virtual void SetActiveIndex(int index) override {}
  virtual void CloseTabAt(int index) override {}

  // A fake value for the current number of tabs.
  int tab_count_;
};

// Regression test for http://crbug.com/432685.
TEST_F(TabModelListTest, TestGetTabModelForWebContents) {
  TestTabModel tab_model(profile());
  TabModelList::AddTabModel(&tab_model);

  scoped_ptr<content::WebContents> contents(CreateTestWebContents());

  // Should not crash when there are no tabs.
  EXPECT_EQ(NULL, TabModelList::GetTabModelForWebContents(contents.get()));

  // Should not crash when there is an uninitialized tab, i.e. when
  // TabModel::GetTabAt returns NULL.
  tab_model.tab_count_ = 1;
  EXPECT_EQ(NULL, TabModelList::GetTabModelForWebContents(contents.get()));

  TabModelList::RemoveTabModel(&tab_model);
}