public void LexLeftMeta_AdvancesStartToPos()
{
var lexer = new Lexer("{{ name }}");
LexFunctions.LexLeftMeta(lexer);
Assert.AreEqual(lexer.Pos, lexer.Start);
}
public void LexText_ReturnsLexLeftMetaWhenFoundLeftMeta()
{
var lexer = new Lexer("{{ name }}");
var nextLexFunction = LexFunctions.LexText(lexer);
Assert.AreEqual(LexFunctions.LexLeftMeta, nextLexFunction);
}
public void LexLeftMeta_AdvancesPosByTwo()
{
var lexer = new Lexer("{{ name }}");
LexFunctions.LexLeftMeta(lexer);
Assert.AreEqual(2, lexer.Pos);
}
public void LexText_ReturnsNullWhenFoundEof()
{
var lexer = new Lexer("Hello world");
var nextLexFunction = LexFunctions.LexText(lexer);
Assert.IsNull(nextLexFunction);
}
public void LexLeftMeta_ReturnsLexInsideAction()
{
var lexer = new Lexer("{{ name }}");
var nextLexFunction = LexFunctions.LexLeftMeta(lexer);
Assert.AreEqual(LexFunctions.LexInsideAction, nextLexFunction);
}
public void LexText_EmitsNoTextTokenWhenTextStartsWithLeftMeta()
{
var lexer = new Lexer("{{ name }}");
LexFunctions.LexText(lexer);
var result = lexer.Tokens.ToArray();
Assert.AreEqual(0, result.Length);
}
public void LexLeftMeta_EmitsLeftMeta()
{
var lexer = new Lexer("{{ name }}");
LexFunctions.LexLeftMeta(lexer);
var tokens = lexer.Tokens.ToArray();
Assert.AreEqual(1, tokens.Length);
Assert.AreEqual(Lexeme.LeftMeta, tokens[0].Type);
Assert.AreEqual("{{", tokens[0].Value);
}
public void LexText_EmitsSingleTextTokenForTextPrecedingLeftMeta()
{
var lexer = new Lexer("Hello {{ name }}");
LexFunctions.LexText(lexer);
var tokens = lexer.Tokens.ToArray();
Assert.AreEqual(1, tokens.Length);
Assert.AreEqual(Lexeme.Text, tokens[0].Type);
Assert.AreEqual("Hello ", tokens[0].Value);
}
public void LexText_EmitsSingleTextTokenOnAllTextInput()
{
var lexer = new Lexer("Hello world");
LexFunctions.LexText(lexer);
var tokens = lexer.Tokens.ToArray();
Assert.AreEqual(1, tokens.Length);
Assert.AreEqual(Lexeme.Text, tokens[0].Type);
Assert.AreEqual("Hello world", tokens[0].Value);
}
