namespace HeuristicLab.Tests.Interpreter.Expressions {
  using HeuristicLab.Problems.ProgramSynthesis.Push.Expressions;
  using HeuristicLab.Problems.ProgramSynthesis.Push.Stack;

  using Microsoft.VisualStudio.TestTools.UnitTesting;

  [TestClass]
  public class BooleanExpressionTests : CommonTests<bool> {
    protected override string TypeName
    {
      get
      {
        return "BOOLEAN";
      }
    }

    protected override IStack<bool> Stack
    {
      get
      {
        return this.interpreter.BooleanStack;
      }
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("BooleanExpressionTest")]
    public void TestAnd() {
      this.interpreter.BooleanStack.Push(true, false);
      this.interpreter.Run(new BooleanAndExpression());

      Assert.AreEqual(false, this.interpreter.BooleanStack.Top);

      this.TestStackCounts(booleanStack: 1);
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("BooleanExpressionTest")]
    public void TestAndWithInsufficientArguments() {
      this.TestWithInsufficientArguments("AND", 1);
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("BooleanExpressionTest")]
    public void TestOr() {
      this.interpreter.BooleanStack.Push(true, false);
      this.interpreter.Run(new BooleanOrExpression());

      Assert.AreEqual(true, this.interpreter.BooleanStack.Top);

      this.TestStackCounts(booleanStack: 1);
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("BooleanExpressionTest")]
    public void TestOrWithInsufficientArguments() {
      this.TestWithInsufficientArguments("OR", 1);
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("BooleanExpressionTest")]
    public void TestNot() {
      this.interpreter.BooleanStack.Push(true);
      this.interpreter.Run(new BooleanNotExpression());

      Assert.AreEqual(false, this.interpreter.BooleanStack.Top);

      this.TestStackCounts(booleanStack: 1);
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("BooleanExpressionTest")]
    public void TestNotWithInsufficientArguments() {
      this.TestWithInsufficientArguments("NOT");
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("BooleanExpressionTest")]
    public void TestFromFloat() {
      this.interpreter.FloatStack.Push(2.0);
      this.interpreter.Run(new BooleanFromFloatExpression());

      Assert.AreEqual(true, this.interpreter.BooleanStack.Top);

      this.TestStackCounts(booleanStack: 1);
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("BooleanExpressionTest")]
    public void TestFromFloatWithInsufficientArguments() {
      this.TestWithInsufficientArguments("FROMFLOAT");
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("BooleanExpressionTest")]
    public void TestFromInteger() {
      this.interpreter.IntegerStack.Push(2);
      this.interpreter.Run(new BooleanFromIntegerExpression());

      Assert.AreEqual(true, this.interpreter.BooleanStack.Top);

      this.TestStackCounts(booleanStack: 1);
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("BooleanExpressionTest")]
    public void TestFromIntegerWithInsufficientArguments() {
      this.TestWithInsufficientArguments("FROMINTEGER");
    }

    protected override bool[] GetValues(int count) {
      var values = new bool[count];

      for (var i = 0; i < count; i++) values[i] = i % 2 == 0;

      return values;
    }

    protected override void CheckOtherStacksAreEmpty() {
      this.TestStackCounts(booleanStack: null);
    }
  }
}