public void ReplaceOperation_ReplacesCorrectOperation()
{
// Arrange
var otherOpd1 = new Operand(0);
var otherOp = new AddOperator();
var otherOpd2 = new Operand(0);
var lOperand = new Operand(0);
var op = new AddOperator();
var rOperand = new Operand(0);
var elements = new Element[]
{
otherOpd1, otherOp, otherOpd2,
lOperand, op, rOperand
};
var sut = new ElementList(elements);
var operation = new Operation(lOperand, op, rOperand);
// Act
sut.ReplaceOperation(operation, new Operand(0));
var result = sut.FindOperation();
// Assert
Assert.AreEqual(otherOpd1, result.LOperand);
Assert.AreEqual(otherOp, result.Op);
Assert.AreEqual(otherOpd2, result.ROperand);
}
public void ReplaceOperationWorks()
{
// Arrange
var lOperand = new Operand(0);
var op = new AddOperator();
var rOperand = new Operand(0);
var elements = new Element[]
{
lOperand, op, rOperand
};
var sut = new ElementList(elements);
var operation = new Operation(lOperand, op, rOperand);
// Act
sut.ReplaceOperation(operation, new Operand(0));
var result = sut.FindOperation();
// Assert
Assert.IsNull(result);
}
public void ReplaceOperationCanHandleNegativeNumbers()
{
// Arrange
var op = new SubOperator();
var rOperand = new Operand(1);
var newOperand = new Operand(-1);
var elements = new Element[]
{
op, rOperand
};
var sut = new ElementList(elements);
var operation = sut.FindOperation();
// Act
sut.ReplaceOperation(operation, newOperand);
// Assert
Assert.AreEqual(-1, sut.First.Value);
Assert.IsNull(sut.FindOperation());
}