// 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.

#ifndef CHROME_BROWSER_DIAGNOSTICS_DIAGNOSTICS_TEST_H_
#define CHROME_BROWSER_DIAGNOSTICS_DIAGNOSTICS_TEST_H_
#pragma once

#include "base/compiler_specific.h"
#include "base/string16.h"
#include "chrome/browser/diagnostics/diagnostics_model.h"

class FilePath;

// Represents a single diagnostic test and encapsulates the common
// functionality across platforms as well.
// It also Implements the TestInfo interface providing the storage
// for the outcome of the test.
// Specific tests need (minimally) only to:
// 1- override ExecuteImpl() to implement the test.
// 2- call RecordStopFailure() or RecordFailure() or RecordSuccess()
//    at the end of the test.
// 3- Optionally call observer->OnProgress() if the test is long.
// 4- Optionally call observer->OnSkipped() if the test cannot be run.
class DiagnosticTest : public DiagnosticsModel::TestInfo {
 public:
  // |title| is the human readable, localized string that says that
  // the objective of the test is.
  explicit DiagnosticTest(const string16& title);

  virtual ~DiagnosticTest();

  // Runs the test. Returning false signals that no more tests should be run.
  // The actual outcome of the test should be set using the RecordXX functions.
  bool Execute(DiagnosticsModel::Observer* observer, DiagnosticsModel* model,
               size_t index);

  virtual string16 GetTitle() OVERRIDE;

  virtual DiagnosticsModel::TestResult GetResult() OVERRIDE;

  virtual string16 GetAdditionalInfo() OVERRIDE;

  void RecordStopFailure(const string16& additional_info) {
    RecordOutcome(additional_info, DiagnosticsModel::TEST_FAIL_STOP);
  }

  void RecordFailure(const string16& additional_info) {
    RecordOutcome(additional_info, DiagnosticsModel::TEST_FAIL_CONTINUE);
  }

  void RecordSuccess(const string16& additional_info) {
    RecordOutcome(additional_info, DiagnosticsModel::TEST_OK);
  }

  void RecordOutcome(const string16& additional_info,
                     DiagnosticsModel::TestResult result);

  static FilePath GetUserDefaultProfileDir();

 protected:
  // The id needs to be overridden by derived classes and must uniquely
  // identify this test so other test can refer to it.
  virtual int GetId() = 0;
  // Derived classes override this method do perform the actual test.
  virtual bool ExecuteImpl(DiagnosticsModel::Observer* observer) = 0;

  string16 title_;
  string16 additional_info_;
  DiagnosticsModel::TestResult result_;
};

#endif  // CHROME_BROWSER_DIAGNOSTICS_DIAGNOSTICS_TEST_H_