source: branches/HeuristicLab.Problems.GrammaticalOptimization/Test/TestSymbRegInstances.cs @ 11895

using System;
using System.Linq;
using HeuristicLab.Algorithms.GeneticProgramming;
using HeuristicLab.Algorithms.GrammaticalOptimization;
using HeuristicLab.Problems.GrammaticalOptimization.SymbReg;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace HeuristicLab.Problems.GrammaticalOptimization.Test {
  // tests for the brige to the HL symb-reg instances
  [TestClass]
  public class TestSymbRegInstances {
    [TestMethod]
    public void TestGetDataDescriptors() {

      var problem = new SymbolicRegressionProblem(new Random(), "Tower");
      double r2;
      Assert.AreEqual(problem.Evaluate("a*b"), problem.OptimizeConstantsAndEvaluate("a*b"));
      Assert.AreEqual(problem.OptimizeConstantsAndEvaluate("a*b"), problem.Evaluate("a*b"));
      Assert.AreEqual(problem.OptimizeConstantsAndEvaluate("0*a*b"), problem.Evaluate("a*b"), 1E-6);
      Assert.AreEqual(problem.OptimizeConstantsAndEvaluate("0*a*b+1"), problem.Evaluate("a*b"), 1E-6);
      Assert.IsTrue(problem.OptimizeConstantsAndEvaluate("0*a+b") >= problem.Evaluate("a+b"));
      Assert.AreEqual(problem.OptimizeConstantsAndEvaluate("0*a+0*b"), problem.Evaluate("a+b"), 1E-6);
      Assert.IsTrue(problem.OptimizeConstantsAndEvaluate("0*a+1*b") >= problem.Evaluate("a+b"));
    }
  }
}