private static string BuildParseTree(string exp)
{
var stack = new Stack <Token>();
TokenCollection tokens = GetTokens(exp);
tokens.CreateRPN();
return(tokens.Calculate());
}
public void Calculate_WithoutRPN_ReturnExceptionTest()
{
//Arrange
var stringTokens = "2 + 2".Split();
TokenCollection tokens = new TokenCollection();
List <ServerFormula> formulas = new List <ServerFormula>();
//Act
tokens.AddMany(stringTokens);
//Assert
Assert.ThrowsException <InvalidOperationException>(() => tokens.Calculate(formulas));
}
public void Calculate_DivideByZeroTest()
{
//Arrange
var stringTokens = "2 / 0".Split();
TokenCollection tokens = new TokenCollection();
List <ServerFormula> formulas = new List <ServerFormula>();
//Act
tokens.AddMany(stringTokens);
tokens.CreateRPN();
//Assert
Assert.ThrowsException <DivideByZeroException>(() => tokens.Calculate(formulas));
}
public void CalcuateTest(string expression, double expectedResult)
{
//Arrange
var stringTokens = expression.Split();
TokenCollection tokens = new TokenCollection();
List <ServerFormula> formulas = new List <ServerFormula>();
//Act
tokens.AddMany(stringTokens);
tokens.CreateRPN();
var result = tokens.Calculate(formulas);
//Assert
Assert.AreEqual(expectedResult, result, 0.01);
}
public void Calcuate_WithIncorrectListOfFormulaTest()
{
//Arrange
var stringTokens = "2 + a * c".Split();
TokenCollection tokens = new TokenCollection();
List <ServerFormula> formulas = new List <ServerFormula>()
{
new ServerFormula {
Name = "a", Value = 13
}
};
//Act
tokens.AddMany(stringTokens);
tokens.CreateRPN();
//Assert
Assert.ThrowsException <ArgumentException>(() => tokens.Calculate(formulas));
}
public void Calcuate_WithCorrectListOfFormulaTest()
{
//Arrange
var stringTokens = "2 + a * 10".Split();
TokenCollection tokens = new TokenCollection();
List <ServerFormula> formulas = new List <ServerFormula>()
{
new ServerFormula {
Name = "a", Value = 13
}
};
//Act
tokens.AddMany(stringTokens);
tokens.CreateRPN();
var result = tokens.Calculate(formulas);
//Assert
Assert.AreEqual(132, result, 0.01);
}