public void ToStringExpressionShouldCopyOperatorToStringExpression()
{
var integerExpression = new IntegerExpression("2");
integerExpression.Operator = Operator.Plus;
var result = _converter.ToStringExpression(integerExpression);
Assert.AreEqual(integerExpression.Operator, result.Operator);
}
public void ToStringExpressionShouldConvertIntegerExpressionToStringExpression()
{
var integerExpression = new IntegerExpression("2");
var result = _converter.ToStringExpression(integerExpression);
Assert.IsInstanceOfType(result, typeof(StringExpression));
Assert.AreEqual("2", result.Compile().Result);
}
public void MergeWithNextWithPlusOperatorShouldSetNextPointer()
{
var exp1 = new IntegerExpression("1");
exp1.Operator = Operator.Plus;
var exp2 = new IntegerExpression("2");
exp1.Next = exp2;
var result = exp1.MergeWithNext();
Assert.IsNull(result.Next);
}
public void MergeWithNextWithPlusOperatorShouldCalulateSumCorrectly()
{
var exp1 = new IntegerExpression("1");
exp1.Operator = Operator.Plus;
var exp2 = new IntegerExpression("2");
exp1.Next = exp2;
var result = exp1.MergeWithNext();
Assert.AreEqual(3d, result.Compile().Result);
}
public void ShouldCompileTwoInterExpressionsToCorrectResult()
{
var exp1 = new IntegerExpression("2");
exp1.Operator = Operator.Plus;
_graph.Add(exp1);
var exp2 = new IntegerExpression("2");
_graph.Add(exp2);
var result = _expressionCompiler.Compile(_graph.Expressions);
Assert.AreEqual(4d, result.Result);
}
public void CompileShouldCalculateMultipleExpressionsAccordingToPrecedence()
{
var exp1 = new IntegerExpression("2");
exp1.Operator = Operator.Multiply;
_graph.Add(exp1);
var exp2 = new IntegerExpression("2");
exp2.Operator = Operator.Plus;
_graph.Add(exp2);
var exp3 = new IntegerExpression("2");
exp3.Operator = Operator.Multiply;
_graph.Add(exp3);
var exp4 = new IntegerExpression("2");
_graph.Add(exp4);
var result = _expressionCompiler.Compile(_graph.Expressions);
Assert.AreEqual(8d, result.Result);
}