public void LexEndOfInputToken(string input)
{
// Arrange
var syntaxFactory = new SyntaxFactory();
var lexer = new CommandLineLexer(syntaxFactory);
// Act
var token = lexer.Lex(input).Last();
// Assert
Assert.Equal(SyntaxKind.EndOfInputToken, token.Kind);
}
public void LexNegativeNumberToken(string input, string value)
{
// Arrange
var syntaxFactory = new SyntaxFactory();
var lexer = new CommandLineLexer(syntaxFactory);
// Act
var token = lexer.Lex(input).First();
// Assert
Assert.Equal(value, token.StringValue);
Assert.Equal(SyntaxKind.LiteralToken, token.Kind);
}
public void LexSpecialToken(string input, string value, SyntaxKind kind)
{
// Arrange
var syntaxFactory = new SyntaxFactory();
var lexer = new CommandLineLexer(syntaxFactory);
// Act
var token = lexer.Lex(input).First();
// Assert
Assert.Equal(value, token.StringValue);
Assert.Equal(kind, token.Kind);
}
public void LexTokensPair(string input,
string firstValue, SyntaxKind firstKind,
string secondValue, SyntaxKind secondKind)
{
// Arrange
var syntaxFactory = new SyntaxFactory();
var lexer = new CommandLineLexer(syntaxFactory);
// Act
var tokens = lexer.Lex(input).ToArray();
var first = tokens[0];
var second = tokens[1];
// Assert
Assert.Equal(firstValue, first.StringValue);
Assert.Equal(firstKind, first.Kind);
Assert.Equal(secondValue, second.StringValue);
Assert.Equal(secondKind, second.Kind);
}
public void LexTokenTrivia(string input, int leading, int trailing)
{
// Arrange
var syntaxFactory = new SyntaxFactory();
var lexer = new CommandLineLexer(syntaxFactory);
// Act
var token = lexer.Lex(input).First();
// Assert
if (leading > 0)
{
Assert.True(token.HasLeadingTrivia);
Assert.Equal(leading, token.LeadingTrivia.Span.Length);
}
if (trailing > 0)
{
Assert.True(token.HasTrailingTrivia);
Assert.Equal(trailing, token.TrailingTrivia.Span.Length);
}
}