public void BooleanGREATEROREQUALS2()
{
AST root = new AST(new Token(Token.TokenType.OPERATOR, ">="));
AST lhs = new AST(new Token(Token.TokenType.NUMBER, "4"));
AST rhs = new AST(new Token(Token.TokenType.NUMBER, "3"));
root.addChild(lhs);
root.addChild(rhs);
ExpressionEvaluator e = new ExpressionEvaluator(root);
Assert.AreEqual(1, e.getValue());
}
public void BooleanAND()
{
AST root = new AST(new Token(Token.TokenType.OPERATOR, "&&"));
AST lhs = new AST(new Token(Token.TokenType.NUMBER, "1"));
AST rhs = new AST(new Token(Token.TokenType.NUMBER, "0"));
root.addChild(lhs);
root.addChild(rhs);
ExpressionEvaluator e = new ExpressionEvaluator(root);
Assert.AreEqual(0, e.getValue());
}
public void BasicEvaluation()
{
Tokenizer tokenizer = new Tokenizer(s_errorHandler, true);
List<Token> tokens = tokenizer.process(File.OpenText("code9.txt"));
Parser parser = new Parser(tokens, s_errorHandler);
parser.process();
AST root = parser.getAST();
AST expressionTree = root.getChild(0).getChild(0);
ExpressionEvaluator e1 = new ExpressionEvaluator(expressionTree);
Assert.AreEqual(26, e1.getValue());
}
public void HandleNegativeNumbers()
{
Tokenizer tokenizer = new Tokenizer(s_errorHandler, true);
List<Token> tokens = tokenizer.process(File.OpenText("code10.txt"));
Parser parser = new Parser(tokens, s_errorHandler);
parser.process();
AST root = parser.getAST();
AST expressionTree = root.getChild(0).getChild(0);
ExpressionEvaluator e = new ExpressionEvaluator(expressionTree);
Assert.AreEqual(-5, e.getValue());
}
public void EvaluateSingleNumber()
{
AST tree = new AST(new Token(Token.TokenType.NUMBER, "42"));
ExpressionEvaluator e = new ExpressionEvaluator(tree);
Assert.AreEqual(42, e.getValue());
}
