public void String_NoMatch_ReturnsError()
{
var parser = Chars.String("xyz");
var result = parser.Parse("abc");
ParseAssert.IsError(result);
}
public void String_Match_ReturnsValue()
{
var parser = Chars.String("abc");
var result = parser.Parse("abc");
ParseAssert.ValueEquals("abc", result);
}
public void String_EndOfInput_ReturnsError()
{
var parser = Chars.String("xyz");
var result = parser.Parse("xy");
ParseAssert.IsError(result);
}
public void Not_Error_ReturnsSuccess()
{
var parser = Parse.Not(Chars.String("xyz"));
var result = parser.Parse("x");
ParseAssert.ValueEquals(Unit.Instance, result);
}
public void String_NoMatch_ConsumesNoInput()
{
var parser = Chars.String("xyz");
var input = new StringInputReader("---");
var result = parser.Parse(input);
Position position = input.GetPosition();
Assert.AreEqual(0, position.Offset);
}
public void String_PartialMatch_SetsCorrectPosition()
{
var parser = Chars.String("xyz");
var input = new StringInputReader("xy-");
var result = parser.Parse(input);
Position position = input.GetPosition();
Assert.AreEqual(2, position.Offset, "Offset");
Assert.AreEqual(1, position.Line, "Line");
Assert.AreEqual(3, position.Column, "Column");
}
/// <summary>
/// Parses the given symbol followed by any whitespace. Returns the parsed symbol.
/// </summary>
public static IParser <string> Symbol(string symbol)
{
return(Lexeme(Chars.String(symbol)));
}