public void Test_Correct_TokenType()
{
string input = "everything (over 1.11 + 1)&& ;<";
var tokens = TextTokenizer.TextTokenize(input);
Assert.Equal(TextTokenType.Word, tokens[0].Type);
Assert.Equal(TextTokenType.ParentheseStart, tokens[1].Type);
Assert.Equal(TextTokenType.Word, tokens[2].Type);
Assert.Equal(TextTokenType.Number, tokens[3].Type);
Assert.Equal(TextTokenType.Operator, tokens[4].Type);
Assert.Equal(TextTokenType.Number, tokens[5].Type);
Assert.Equal(TextTokenType.ParentheseStop, tokens[6].Type);
Assert.Equal(TextTokenType.Operator, tokens[7].Type);
Assert.Equal(TextTokenType.EndOfSentence, tokens[8].Type);
Assert.Equal(TextTokenType.Operator, tokens[9].Type);
}
public void Test_Correct_TokenContent()
{
string input = "everything is over 1.11 + 1 && 1 < 1";
var tokens = TextTokenizer.TextTokenize(input);
Assert.Equal("everything", new String(tokens[0].RawData.ToArray()));
Assert.Equal("is", new String(tokens[1].RawData.ToArray()));
Assert.Equal("over", new String(tokens[2].RawData.ToArray()));
Assert.Equal("1.11", new String(tokens[3].RawData.ToArray()));
Assert.Equal("+", new String(tokens[4].RawData.ToArray()));
Assert.Equal("1", new String(tokens[5].RawData.ToArray()));
Assert.Equal("&&", new String(tokens[6].RawData.ToArray()));
Assert.Equal("1", new String(tokens[7].RawData.ToArray()));
Assert.Equal("<", new String(tokens[8].RawData.ToArray()));
Assert.Equal("1", new String(tokens[9].RawData.ToArray()));
}
public void Order_Of_Adding_And_Multiplyging_Is_Correct2()
{
string input = "1+2*3;";
var TextTokens = TextTokenizer.TextTokenize(input);
Parser parsers = new Parser(TextTokens);
var AST = parsers.ParseExpression();
Assert.Equal(ExpressionType.BinaryOperation, AST.Type);
Assert.Equal(BinaryExpressionType.Add, ((BinaryExpressionNode)AST).BinaryType);
}
public void One_Plus_One_Is_Two()
{
string input = "1 + 1";
var TextTokens = TextTokenizer.TextTokenize(input);
Parser parsers = new Parser(TextTokens);
var AST = parsers.ParseExpression();
global::BRE.ExecutionContext context = new global::BRE.ExecutionContext();
ExecutionEngine executionEngine = new ExecutionEngine(context);
executionEngine.ExecuteExpression(AST);
Assert.Equal(2.0, (double)AST.EvaluatedValue.Value);
}
public void Basic_Boolean_Logic_Got_Correct_AST()
{
string input = "1 + 3 > 1 && 1 + 1 > 0";
var TextTokens = TextTokenizer.TextTokenize(input);
Parser parsers = new Parser(TextTokens);
var AST = parsers.ParseExpression();
var BinaryAst = (BinaryExpressionNode)AST;
var left = (BinaryExpressionNode)BinaryAst.Left;
var right = (BinaryExpressionNode)BinaryAst.Right;
Assert.Equal(BinaryExpressionType.GreaterThan, left.BinaryType);
Assert.Equal(BinaryExpressionType.GreaterThan, right.BinaryType);
}
public void One_Plus_Two_Is_Greater_Than_Two()
{
string input = "1 + 2 > 2";
var TextTokens = TextTokenizer.TextTokenize(input);
Parser parsers = new Parser(TextTokens);
var AST = parsers.ParseExpression();
global::BRE.ExecutionContext context = new global::BRE.ExecutionContext();
ExecutionEngine executionEngine = new ExecutionEngine(context);
executionEngine.ExecuteExpression(AST);
Assert.Equal(ValueType.Logical, AST.EvaluatedValue.Type);
Assert.Equal(true, (bool)AST.EvaluatedValue.Value);
}
public void Variables_Can_Be_Found_By_Name()
{
string input = "1+Apple";
var TextTokens = TextTokenizer.TextTokenize(input);
Parser parsers = new Parser(TextTokens);
var AST = parsers.ParseExpression();
var BinaryAst = (BinaryExpressionNode)AST;
var left = (ConstantExpression)BinaryAst.Left;
var right = (VariableExpression)BinaryAst.Right;
Assert.Equal(BinaryExpressionType.Add, BinaryAst.BinaryType);
Assert.Equal(1.0, (double)left.Value.Value);
Assert.Equal("Apple", right.VariableValue.VariableName);
}
public void Add_Operator_Has_Higher_Precedence_Than_Adding()
{
string input = "1 && 1 + 1";
var TextTokens = TextTokenizer.TextTokenize(input);
Parser parsers = new Parser(TextTokens);
var AST = parsers.ParseExpression();
var BinaryAst = (BinaryExpressionNode)AST;
var left = (ConstantExpression)BinaryAst.Left;
var right = (BinaryExpressionNode)BinaryAst.Right;
Assert.Equal(BinaryExpressionType.And, BinaryAst.BinaryType);
Assert.Equal(1.0, (double)left.Value.Value);
Assert.Equal(BinaryExpressionType.Add, right.BinaryType);
}
public void Variable_Can_Be_Found_From_Context()
{
string input = "Word";
var TextTokens = TextTokenizer.TextTokenize(input);
Parser parsers = new Parser(TextTokens);
var AST = parsers.ParseExpression();
global::BRE.ExecutionContext context = new global::BRE.ExecutionContext();
context.AddVariableValue("word", 2.313);
ExecutionEngine executionEngine = new ExecutionEngine(context);
executionEngine.ExecuteExpression(AST);
Assert.Equal(ValueType.Number, AST.EvaluatedValue.Type);
Assert.Equal(2.313, (double)AST.EvaluatedValue.Value);
}
public void Parentheses_Affect_The_Order_Of_AST()
{
string input = "1*(2+2.2)+3;";
var TextTokens = TextTokenizer.TextTokenize(input);
Parser parsers = new Parser(TextTokens);
var AST = parsers.ParseExpression();
var BinaryAst = (BinaryExpressionNode)AST;
var left = (BinaryExpressionNode)BinaryAst.Left;
var leftRight = (ExpressionNode)left.Right;
var targetExpression = (BinaryExpressionNode)leftRight.Expression;
Assert.Equal(BinaryExpressionType.Add, targetExpression.BinaryType);
Assert.Equal(2.0, (double)targetExpression.Left.Value.Value);
Assert.Equal(2.2, (double)targetExpression.Right.Value.Value);
}
public void Ternary_Expression_Parsed_Correctly()
{
string input = " 1 == 2 ? 2 : 3";
var TextTokens = TextTokenizer.TextTokenize(input);
Parser parsers = new Parser(TextTokens);
var AST = parsers.ParseExpression();
var ternary = (TernaryExpressionNode)AST;
var first = (BinaryExpressionNode)ternary.First;
var second = (ConstantExpression)ternary.Second;
var third = (ConstantExpression)ternary.Third;
Assert.Equal(BinaryExpressionType.Equal, first.BinaryType);
Assert.NotNull(second);
Assert.NotNull(third);
}