public void ShouldErrorInvalidTopLevelStatementAndKeepParsing()
{
#region Arrange Invalid Token Input
var badToken = new Token(TokenType.String, 5, 5, "for");
var tokenList = new List<Token>
{
badToken,
// and the keep parsing part
new Token(TokenType.EndLine, 0, 4, Environment.NewLine),
new Token(TokenType.Id, 0, 0, "syntax"),
new Token(TokenType.Control, 0, 1, "="),
new Token(TokenType.String, 0, 2, "\"proto3\""),
new Token(TokenType.Control, 0, 3, ";"),
new Token(TokenType.EndLine, 0, 4, Environment.NewLine)
};
#endregion Arrange Invalid Token Input
#region Arrange Expected NodeTree Output
// Verify we kept parsing.
var root = new RootNode();
var errors = new[] { new ParseError("Found an invalid top level statement at token ", badToken) };
var syntax = new Node(NodeType.Syntax, "syntax");
var proto3 = new Node(NodeType.StringLiteral, "proto3");
syntax.AddChild(proto3);
root.AddErrors(errors);
root.AddChild(syntax);
#endregion Arrange Expected NodeTree Output
AssertSyntax(tokenList, root);
}
public RootNode Analyze()
{
var root = new RootNode();
while (_tokens.Any())
{
var topLevelStatement = ParseTopLevelStatement(root);
if (topLevelStatement != null) root.AddChild(topLevelStatement);
}
root.AddErrors(_errors);
return root;
}
public void ShouldErrorWhenImportNotQuoted()
{
#region Arrange Import Declaration Token Input
var errorToken = new Token(TokenType.String, 0, 1, "other.message");
var tokenList = new List<Token>
{
new Token(TokenType.Id, 0, 0, "import"),
errorToken,
new Token(TokenType.Control, 0, 2, ";"),
new Token(TokenType.EndLine, 0, 4, Environment.NewLine)
};
#endregion Arrange Import Declaration Token Input
#region Arrange Expected NodeTree Output
var root = new RootNode();
root.AddErrors(new[] { new ParseError("Could not find import location for import at line starting with token ", errorToken) });
#endregion Arrange Expected NodeTree Output
AssertSyntax(tokenList, root);
}
public void ShouldErrorWhenStatementNotTerminatedWithSemicolon()
{
#region Arrange Syntax Declaration Token Input
var errorToken = new Token(TokenType.Control, 0, 3, ":"); // Colon, not semicolon!
var tokenList = new List<Token>
{
new Token(TokenType.Id, 0, 0, "syntax"),
new Token(TokenType.Control, 0, 1, "="),
new Token(TokenType.String, 0, 2, "\"proto3\""),
errorToken,
new Token(TokenType.EndLine, 0, 4, Environment.NewLine)
};
#endregion Arrange Syntax Declaration Token Input
#region Arrange Expected NodeTree Output
var root = new RootNode();
root.AddErrors(new[] { new ParseError("Expected terminating `;` after top level statement, found token ", errorToken) });
#endregion Arrange Expected NodeTree Output
AssertSyntax(tokenList, root);
}
public void ShouldErrorWhenSyntaxNotQuoted()
{
#region Arrange Syntax Declaration Token Input
var errorToken = new Token(TokenType.String, 0, 2, "proto3");
var tokenList = new List<Token>
{
new Token(TokenType.Id, 0, 0, "syntax"),
new Token(TokenType.Control, 0, 1, "="),
errorToken,
new Token(TokenType.Control, 0, 3, ";"),
new Token(TokenType.EndLine, 0, 4, Environment.NewLine)
};
#endregion Arrange Syntax Declaration Token Input
#region Arrange Expected NodeError Output
var root = new RootNode();
root.AddErrors(new[] { new ParseError("Expected a string literal after syntax assignment, found token ", errorToken) });
#endregion Arrange Expected NodeError Output
AssertSyntax(tokenList, root);
}