public void BuildTree_EmptyExpression_ReturnsEmptyExpressionTree()
{
List <Token> tokens = new List <Token>();
EndOfTokenStreamException exception = Assert.Throws <EndOfTokenStreamException>(
() => builder.BuildTree(new Tokens(tokens))
);
Assert.AreEqual("Unexpected end of token stream", exception.Message);
}
public static SyntaxNode ParseExpression(string expression, Environment environment)
{
SyntaxTreeBuilder builder = new SyntaxTreeBuilder();
SyntaxNode root = builder.BuildTree(Lexer.Lex(new RawExpression(expression)));
return(SemanticAnalyzer.Analyze(root, environment));
}
public void BuildTree_SimpleExpression_ReturnsIdentifierNode()
{
List <Token> tokens = new List <Token>
{
new Token(TokenType.Identifier, "a"),
};
SyntaxNode node = builder.BuildTree(new Tokens(tokens));
Assert.AreEqual("a", node.ToString());
}