/// <summary>
/// Executes the GET command.
/// </summary>
public void Execute()
{
if (!_runEnvironment.CurrentLine.LineNumber.HasValue)
{
throw new Exceptions.IllegalDirectException();
}
var variableReference = _expressionEvaluator.GetLeftValue();
var newChar = _teletypeWithPosition.ReadChar();
Accumulator newValue;
if (variableReference.IsString)
{
newValue = new Accumulator(newChar.ToString());
}
else
{
if ("+-E.\0".Contains(newChar.ToString()))
{
newChar = '0';
}
if (newChar < '0' || newChar > '9')
{
throw new Exceptions.SyntaxErrorException();
}
newValue = new Accumulator((double)(newChar - '0'));
}
variableReference.SetValue(newValue);
}
public void TeletypeWithPositionForwardsReadChar()
{
_mockTeletype = new Mock <ITeletype>();
_mockTeletype.Setup(mt => mt.ReadChar()).Returns('A');
_sut = new TeletypeWithPosition(_mockTeletype.Object);
var readChar = _sut.ReadChar();
_mockTeletype.Verify(mt => mt.ReadChar(), Times.Once);
Assert.AreEqual('A', readChar);
}
