private BinaryTree PrologTerm(string s)
{
// Try to parse 'predicate.'
Write("parsertest.txt", s);
StreamReader sr = new StreamReader("C:\\parsertest.txt");
PrologCodeParser parser = new PrologCodeParser();
parser.Scanner = new PrologScanner(sr);
BinaryTree ast = parser.Term(1200);
sr.Close();
File.Delete("C:\\parsertest.txt");
return(ast);
}
public void Parse_Fact_no_Args()
{
// Try to parse 'predicate.'
Write("factnoargs.txt", "predicate.");
StreamReader sr = new StreamReader("C:\\factnoargs.txt");
PrologCodeParser parser = new PrologCodeParser();
parser.Scanner = new PrologScanner(sr);
BinaryTree ast = parser.Term(1200);
sr.Close();
// Expect: BinaryTree("predicate", null, null, null);
Assert.AreEqual("predicate", ast.Name);
Assert.IsNull(ast.Left);
Assert.IsNull(ast.Right);
Assert.IsNull(ast.Arguments);
}
private void GetFile(string filename, ref string expected, ref string result)
{
StreamReader sr = new StreamReader(filename);
PrologCodeParser parser = new PrologCodeParser();
parser.Scanner = new PrologScanner(sr);
PrologCodeTerm term = parser.ConvertBinaryTreeToCodeDOM(parser.Term(1200));
sr.Close();
StreamReader codefile = new StreamReader(filename);
string originalCode = codefile.ReadLine();
codefile.Close();
string exp = originalCode.Replace(" ", "").Replace(".", "");
string res = term.ToString().Replace(" ", "").Replace(".", "");
expected = exp;
result = res;
}
public void Parse_Fact_with_Variable_Arg()
{
// Try to parse 'predicate.'
Write("factnoargs.txt", "predicate(X).");
StreamReader sr = new StreamReader("C:\\factnoargs.txt");
PrologCodeParser parser = new PrologCodeParser();
parser.Scanner = new PrologScanner(sr);
BinaryTree ast = parser.Term(1200);
sr.Close();
// Expect: BinaryTree("predicate", null, null, null);
Assert.AreEqual("predicate", ast.Name);
Assert.IsNull(ast.Left);
Assert.IsNull(ast.Right);
ArrayList args = new ArrayList();
ast.Flatten((BinaryTree)ast.Arguments[0], ref args);
Assert.AreEqual(1, args.Count);
}
