public void SubtractionExpressionEvaluatesDifferenceInComplexExpression()
{
//mnozenje djeljenje testovi, cos i sin sa metodom
// 2 + x - 7 + x - 10
IExpression two = new Constant(2);
IExpression x = new VariableX();
IExpression seven = new Constant(7);
IExpression ten = new Constant(10);
IExpression result = new SumExpression(two, x);
result = new SubtractionExpression(result, seven);
result = new SumExpression(result, x);
result = new SubtractionExpression(result, ten);
Context c = new Context(5);
List <IExpression> operand = new List <IExpression>();
List <IExpression> operations = new List <IExpression>();
var y = result.Interpret(c);
Assert.AreEqual(-5, y, 1e-10);
c = new Context(-3);
y = result.Interpret(c);
Assert.AreEqual(-21, y, 1e-10);
}
public void SubtractionExpressionEvaluatesDifferenceOf2Constants()
{
IExpression leftConstant = new Constant(4);
IExpression rightConstant = new Constant(6);
IExpression difference = new SubtractionExpression(leftConstant, rightConstant);
Context context = new Context(0);
var result = difference.Interpret(context);
Assert.AreEqual(-2, result, 1e-10);
}
