public void Expressao_complexa()
{
var converter = new InfixToPostfixConverter();
var result = converter.Convert("3 + 4 * 2 / ( 1 - 5 ) ^ 2 ^ 3");
result.Should().Be("3 4 2 * 1 5 - 2 3 ^ ^ / +");
}
public void Soma_com_dois_operandos()
{
var converter = new InfixToPostfixConverter();
var result = converter.Convert("2 + 2");
result.Should().Be("2 2 +");
}
public void Maior_precedencia_com_associatividade_direita_para_esquerda()
{
var converter = new InfixToPostfixConverter();
var result = converter.Convert("4 * 5 ^ 2");
result.Should().Be("4 5 2 ^ *");
}
public void Soma_com_parentesis_e_multiplicacao()
{
var converter = new InfixToPostfixConverter();
var result = converter.Convert("(2 + 2) * 4");
result.Should().Be("2 2 + 4 *");
}
public void Soma_e_multiplicacao()
{
var converter = new InfixToPostfixConverter();
var result = converter.Convert("2 + 2 * 4");
result.Should().Be("2 2 4 * +");
}
public void ConversionTest(string infixExpression, string expected)
{
var postfixList = InfixToPostfixConverter.Convert(infixExpression);
string postfixExpression = "";
foreach (var unit in postfixList)
{
postfixExpression += unit + " ";
}
Assert.AreEqual(expected, postfixExpression);
}
public void EvaluatesCorrectly(string expressionString, float expectedResult)
{
// arrange
var expressionNodeFactory = new ExpressionNodeFactory();
var expressionTokenizer = new ExpressionTokenizer();
var infixToPostfixConverter = new InfixToPostfixConverter();
var expressionFactory = new ExpressionFactory(expressionNodeFactory, expressionTokenizer, infixToPostfixConverter);
// act
var expression = expressionFactory.MakeExpression(expressionString);
var result = expression.Evaluate();
// assert
Assert.Equal(expectedResult, result);
}
public void EvaluatesCorrectlyWithAVariableAndSomeStuff()
{
// arrange
var expressionNodeFactory = new ExpressionNodeFactory();
var expressionTokenizer = new ExpressionTokenizer();
var infixToPostfixConverter = new InfixToPostfixConverter();
var expressionFactory = new ExpressionFactory(expressionNodeFactory, expressionTokenizer, infixToPostfixConverter);
// act
var expression = expressionFactory.MakeExpression("(bananas + 1) / 5");
expression.EvaluationContext.GetVariable("bananas").Value = 4.0f;
var result = expression.Evaluate();
// assert
Assert.Equal(1.0f, result);
}
public Expression()
{
parser = new ExpressionParser();
postfixConverter = new InfixToPostfixConverter();
postfixCalculator = new PostfixCalculator();
}
