/// <summary>
/// Executes the PRINT command.
/// </summary>
public void Execute()
{
bool newLine = true;
while (true)
{
var token = _runEnvironment.CurrentLine.NextToken();
if ((token.Seperator == TokenType.Colon) ||
(token.Statement == TokenType.Else) ||
(token.Seperator == TokenType.EndOfLine))
{
if (newLine)
{
_teletype.NewLine();
}
_runEnvironment.CurrentLine.PushToken(token);
return;
}
if ((token.Statement == TokenType.Tab) || (token.Statement == TokenType.Space))
{
short value = _expressionEvaluator.GetExpression().ValueAsShort();
if (_runEnvironment.CurrentLine.NextToken().Seperator != TokenType.CloseBracket)
{
throw new Exceptions.SyntaxErrorException();
}
if (token.Statement == TokenType.Tab)
{
_teletype.Tab(value);
}
else
{
_teletype.Space(value);
}
}
else if ((token.Seperator == TokenType.Semicolon) || (token.Seperator == TokenType.Comma))
{
newLine = false;
if (token.Seperator == TokenType.Comma)
{
_teletype.NextComma();
}
}
else
{
newLine = true;
_runEnvironment.CurrentLine.PushToken(token);
_teletype.Write(_expressionEvaluator.GetExpression().ToString());
}
}
}
public void TeletypeWithPositionCommasInCorrectPlace(
int beforeSpaceCount,
string output,
int expectedBefore,
int expectedAfter)
{
_mockTeletype = new Mock <ITeletype>();
_mockTeletype.Setup(mt => mt.Width).Returns(80);
_sut = new TeletypeWithPosition(_mockTeletype.Object);
_sut.Space((short)beforeSpaceCount);
var actualBefore = _sut.Position();
_sut.Write(output);
_sut.NextComma();
var actualAfter = _sut.Position();
Assert.AreEqual(expectedBefore, actualBefore);
Assert.AreEqual(expectedAfter, actualAfter);
}