#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab 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.
 *
 * HeuristicLab 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 HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using HeuristicLab.IGraph.Wrappers;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace HeuristicLab.Tests {
  [TestClass]
  public class IGraphWrappersMatrixTest {
    [TestMethod]
    [TestCategory("ExtLibs")]
    [TestCategory("ExtLibs.igraph")]
    [TestProperty("Time", "short")]
    public void IGraphWrappersMatrixConstructionAndFinalizationTest() {
      var matrix = new Matrix(3, 2);
      Assert.AreEqual(3, matrix.Rows);
      Assert.AreEqual(2, matrix.Columns);
      Assert.AreEqual(0, matrix[0, 0]);
      matrix[0, 0] = 4;
      var other = new Matrix(matrix);
      Assert.AreEqual(3, other.Rows);
      Assert.AreEqual(2, other.Columns);
      Assert.AreEqual(4, other[0, 0]);

      var mat = new double[,] {
        { 1, 2, 3 },
        { 4, 5, 6}
      };
      matrix = new Matrix(mat);
      Assert.AreEqual(2, matrix.Rows);
      Assert.AreEqual(3, matrix.Columns);
      var test = matrix.ToMatrix();
      for (var i = 0; i < matrix.Rows; i++)
        for (var j = 0; j < matrix.Columns; j++) {
          Assert.AreEqual(mat[i, j], matrix[i, j]);
          Assert.AreEqual(mat[i, j], test[i, j]);
        }
    }

    [TestMethod]
    [TestCategory("ExtLibs")]
    [TestCategory("ExtLibs.igraph")]
    [TestProperty("Time", "short")]
    public void IGraphWrappersMatrixGetSetTest() {
      var matrix = new Matrix(3, 2);
      matrix[0, 0] = matrix[0, 1] = 4;
      matrix[1, 0] = 3;
      matrix[1, 1] = 2;
      matrix[2, 0] = 1.5;
      matrix[2, 1] = -0.5;
      Assert.AreEqual(4, matrix[0, 0]);
      Assert.AreEqual(4, matrix[0, 1]);
      Assert.AreEqual(3, matrix[1, 0]);
      Assert.AreEqual(2, matrix[1, 1]);
      Assert.AreEqual(1.5, matrix[2, 0]);
      Assert.AreEqual(-0.5, matrix[2, 1]);

      var netmat = matrix.ToMatrix();
      Assert.AreEqual(3, netmat.GetLength(0));
      Assert.AreEqual(2, netmat.GetLength(1));
      for (var i = 0; i < netmat.GetLength(0); i++)
        for (var j = 0; j < netmat.GetLength(1); j++)
          Assert.AreEqual(matrix[i, j], netmat[i, j]);
    }

    [TestMethod]
    [TestCategory("ExtLibs")]
    [TestCategory("ExtLibs.igraph")]
    [TestProperty("Time", "short")]
    public void IGraphWrappersMatrixFillTest() {
      var matrix = new Matrix(3, 2);
      matrix.Fill(2.6);
      Assert.AreEqual(2.6, matrix[0, 0]);
      Assert.AreEqual(2.6, matrix[0, 1]);
      Assert.AreEqual(2.6, matrix[1, 0]);
      Assert.AreEqual(2.6, matrix[1, 1]);
      Assert.AreEqual(2.6, matrix[2, 0]);
      Assert.AreEqual(2.6, matrix[2, 1]);
    }

    [TestMethod]
    [TestCategory("ExtLibs")]
    [TestCategory("ExtLibs.igraph")]
    [TestProperty("Time", "short")]
    public void IGraphWrappersMatrixTransposeTest() {
      var matrix = new Matrix(3, 2);
      matrix.Transpose();
      Assert.AreEqual(2, matrix.Rows);
      Assert.AreEqual(3, matrix.Columns);
    }

    [TestMethod]
    [TestCategory("ExtLibs")]
    [TestCategory("ExtLibs.igraph")]
    [TestProperty("Time", "short")]
    public void IGraphWrappersMatrixScaleTest() {
      var matrix = new Matrix(3, 2);
      matrix[0, 0] = matrix[0, 1] = 4;
      matrix[1, 0] = 3;
      matrix[1, 1] = 2;
      matrix[2, 0] = 1.5;
      matrix[2, 1] = -0.5;
      matrix.Scale(2);
      Assert.AreEqual(8, matrix[0, 0]);
      Assert.AreEqual(8, matrix[0, 1]);
      Assert.AreEqual(6, matrix[1, 0]);
      Assert.AreEqual(4, matrix[1, 1]);
      Assert.AreEqual(3, matrix[2, 0]);
      Assert.AreEqual(-1, matrix[2, 1]);
    }
  }
}