public void ItLexesPrograms(string line, IEnumerable<Token> expected)
{
var lexer = new Lexer(line.ToStream());
var tokens = lexer.Lex();
AssertTokenStreamEquals(expected.ToArray(), tokens.ToArray());
}
public void ItLexesMultpleCloseEndGroups()
{
var lexer = new Lexer(
@"a
b
c
d".ToStream());
var stream = lexer.Lex().ToArray();
AssertTokenStreamEquals(stream, new []
{
new Token() { Kind = TokenKind.Statement, Value = "a"},
new Token() { Kind = TokenKind.EOL},
new Token() { Kind = TokenKind.StartGroup },
new Token() { Kind = TokenKind.Statement, Value = "b"},
new Token() { Kind = TokenKind.EOL},
new Token() { Kind = TokenKind.StartGroup },
new Token() { Kind = TokenKind.Statement, Value = "c"},
new Token() { Kind = TokenKind.EOL},
new Token() { Kind = TokenKind.EndGroup },
new Token() { Kind = TokenKind.EndGroup },
new Token() { Kind = TokenKind.Statement, Value = "d"},
new Token() { Kind = TokenKind.EOL},
new Token() { Kind = TokenKind.EOF},
});
}
public void ItFigouresOutGroupStartOrEnd(int spacesBefore,string line, IEnumerable<Token> expected)
{
var lexer = new Lexer(line.ToStream());
lexer.InterpretLine(string.Empty.PadRight(spacesBefore));
var tokens = lexer.InterpretLine(line).ToArray();
AssertTokenStreamEquals(expected.ToArray(), tokens);
}
public void ItInterpretsLines(string line, IEnumerable<Token> expected)
{
var tokens = new Lexer(line.ToStream()).InterpretLine(line).ToArray();
AssertTokenStreamEquals(expected.ToArray(), tokens);
}
public void ItDiesOnInconsistentWhitespace(string code)
{
var lexer = new Lexer(code.ToStream());
Assert.Catch<InconsistentWhitespaceException>(() =>lexer.Lex().ToArray());
}
