{
  Solutions to the Advent Of Code.
  Copyright (C) 2023  Stefan Müller

  This program is free software: you can redistribute it and/or modify it under
  the terms of the GNU General Public License as published by the Free Software
  Foundation, either version 3 of the License, or (at your option) any later
  version.

  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with
  this program.  If not, see <http://www.gnu.org/licenses/>.
}

unit UBaseTestCases;

{$mode ObjFPC}{$H+}

interface

uses
  Classes, SysUtils, fpcunit, USolver;

type

  { TSolverTestCase }

  TSolverTestCase = class(TTestCase)
  protected
    FSolver: ISolver;
    procedure Setup; override;
    procedure TearDown; override;
    function CreateSolver: ISolver; virtual; abstract;
  end;

  { TEngineBaseTest }

  TEngineBaseTest = class(TSolverTestCase)
  protected
    FEngine: TSolverEngine;
    procedure Setup; override;
    procedure TearDown; override;
    function GetDataPath: string; virtual;
  end;

  { TExampleEngineBaseTest }

  TExampleEngineBaseTest = class(TEngineBaseTest)
  protected
    function GetDataPath: string; override;
  end;

implementation

{ TSolverTestCase }

procedure TSolverTestCase.Setup;
begin
  inherited Setup;
  FSolver := CreateSolver;
end;

procedure TSolverTestCase.TearDown;
begin
  FSolver.Free;
  inherited TearDown;
end;

{ TEngineBaseTest }

procedure TEngineBaseTest.Setup;
var
  fileName: string;
begin
  inherited Setup;
  FEngine := TSolverEngine.Create(GetDataPath);
  fileName := FEngine.GetDataFileName(FSolver);
  AssertTrue('Cannot find puzzle input file ''' + ExpandFileName(fileName) + '''. '
    + 'Please download the file from https://adventofcode.com/2023/',
    FileExists(fileName));
  FEngine.ProcessData(FSolver);
end;

procedure TEngineBaseTest.TearDown;
begin
  FEngine.Free;
  inherited TearDown;
end;

function TEngineBaseTest.GetDataPath: string;
begin
  Result := ConcatPaths(['..', '..', 'bin', 'data']);
end;

{ TExampleEngineBaseTest }

function TExampleEngineBaseTest.GetDataPath: string;
begin
  Result := 'example_data';
end;

end.