public void Input_SumAndThenSum()
{
// Arrange
var input = "1 2 3 * + ";
var sut = new ExpressionParser();
// Act
IExpression actual = sut.Parse(input);
var v = new Visitor.Visitor();
((BinaryExpression)actual).Accept(v);
// Assert
Assert.AreEqual(7, actual.Eval());
Assert.AreEqual("1 + 2 * 3", v.ToString());
}
public void Input_SumAndThenSum()
{
// Arrange
var input = "1 2 3 * + ";
var sut = new ExpressionParser();
// Act
IExpression actual = sut.Parse(input);
var v = new Visitor.Visitor();
((BinaryExpression)actual).Accept(v);
// Assert
Assert.AreEqual(7, actual.Eval());
Assert.AreEqual("1 + 2 * 3", v.ToString());
}
public void Eval_When_Sum_OneVariableAndOneConstants5and3_MustReturn_8()
{
// Arrange
var sut = new SumExpression(new AssignmentExpression(
new VariableExpression("P"),
new ConstantExpression(5)),
new ConstantExpression(3));
var v = new Visitor.Visitor();
sut.Accept(v);
// Act
var actual = sut.Eval();
// Assert
Assert.AreEqual(expected: 8, actual: actual);
Assert.AreEqual("(P = 5) + 3", v.ToString());
}
public void Eval_When_Sum_OneVariableAndOneConstants5and3_MustReturn_8()
{
// Arrange
var sut = new SumExpression(new AssignmentExpression(
new VariableExpression("P"),
new ConstantExpression(5)),
new ConstantExpression(3));
var v = new Visitor.Visitor();
sut.Accept(v);
// Act
var actual = sut.Eval();
// Assert
Assert.AreEqual(expected: 8, actual: actual);
Assert.AreEqual("(P = 5) + 3", v.ToString());
}