public void RemainingDataShouldReturnTheReconstructedExpression()
{
//Act
var remaining = _keeper.RemainingData();
//Assert
remaining.Should().Be(string.Join(" ", _tokens.Select(t => t.Text)));
}
public static ArithmeticExpression Parse(string input)
{
var tokens = LexicalAnalyser.ExtractTokens(input ?? string.Empty);
var pos = new TokenKeeper(tokens);
if (TryTakeCalc(pos, out var calculation) && pos.Finished)
{
return(new ArithmeticExpression(calculation));
}
else
{
var errorMessage = $"Unable to interpret calculation at \"{pos.RemainingData()}\"";
return(new ArithmeticExpression(errorMessage));
}
}
public void DiscardWhileShouldConsumeAllMatchingTokens()
{
//Arrange
var original = new TokenKeeper(_keeper);
//Act
_keeper.DiscardWhile(TokenType.OpenParens, TokenType.NumericLiteral, TokenType.Operator);
//Assert
while (original.Next.TokenType != TokenType.CloseParens)
{
original.Take();
}
var remaining = _keeper.RemainingData();
remaining.Should().Be(original.RemainingData());
}