public void IfElseStatementTrue()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("b = 15");
scriptBuilder.AppendLine("if b > 10 do");
scriptBuilder.AppendLine(" b = 20");
scriptBuilder.AppendLine(" b = b * 2");
scriptBuilder.AppendLine("else do");
scriptBuilder.AppendLine(" b = 10");
scriptBuilder.AppendLine("end");
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(scriptBuilder.ToString());
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["b"];
Assert.AreEqual(40.0, variableValue.NumericValue);
}
public void VariableReassignmentTest()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("a = 1");
scriptBuilder.AppendLine("bcd = 200");
scriptBuilder.AppendLine("a = 100");
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(scriptBuilder.ToString());
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
Assert.AreEqual(2, interpreter.Variables.Count);
TurtleScriptValue variableValue = interpreter.Variables["a"];
Assert.AreEqual(100, variableValue.NumericValue);
variableValue = interpreter.Variables["bcd"];
Assert.AreEqual(200, variableValue.NumericValue);
}
public void DuplicateFunctionDefinition()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("def MyFunc(a)");
scriptBuilder.AppendLine(" b = 15 * a");
scriptBuilder.AppendLine("end");
scriptBuilder.AppendLine("def MyFunc(a)");
scriptBuilder.AppendLine(" b = 15 * a");
scriptBuilder.AppendLine("end");
scriptBuilder.AppendLine("MyFunc(1,2,3)");
var script = scriptBuilder.ToString();
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
Assert.AreEqual(
"A function with the name 'MyFunc' already exists. Line 4, Column 0",
interpreter.ErrorMessage);
}
private void buttonExecute_Click(object sender, EventArgs e)
{
var runtimeFunctions = new ScriptedTurtleFunctions();
var mathRuntimeFunctions = new TurtleMath();
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(txtScript.Text, new List <ITurtleScriptRuntime> {
runtimeFunctions, mathRuntimeFunctions
});
buttonExecute.Enabled = false;
bool result;
Cursor = Cursors.WaitCursor;
try
{
result = interpreter.Execute();
}
finally
{
buttonExecute.Enabled = true;
Cursor = Cursors.Default;
}
if (!result)
{
MessageBox.Show(this,
interpreter.ErrorMessage,
"Error");
}
UpdateStatusBar();
}
public void UnknownVariableReference()
{
// Arrange
var script = "a = 55 + ABC";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
Assert.AreEqual("Reference to an unknown variable, 'ABC'. Line 1, Col 9", interpreter.ErrorMessage);
}
public void Garbage5()
{
// Arrange
var script = "55 + ABC";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
Assert.AreEqual("mismatched input '55' expecting <EOF>. Line 1, Col 0", interpreter.ErrorMessage);
}
public void Garbage2()
{
// Arrange
var script = "1234";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
Assert.AreEqual("extraneous input '1234' expecting <EOF>. Line 1, Col 0", interpreter.ErrorMessage);
}
public void Garbage1()
{
// Arrange
var script = "abcd";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
Assert.AreEqual("no viable alternative at input 'abcd'. Line 1, Col 4", interpreter.ErrorMessage);
}
public void MissingTrailingParenthesis3()
{
// Arrange
var script = "a = (( 5 * ( 1 + 1 ))";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
Assert.AreEqual("missing ')' at '<EOF>'. Line 1, Col 21", interpreter.ErrorMessage);
}
public void ExtraParenthesis1()
{
// Arrange
var script = "a = 1 + 1 )";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
Assert.AreEqual("extraneous input ')' expecting <EOF>. Line 1, Col 10", interpreter.ErrorMessage);
}
public void DivideByZero()
{
// Arrange
var script = "a = 5 / 0";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["a"];
Assert.AreEqual(0, variableValue.NumericValue);
}
public void UnknownFunctionReference()
{
// Arrange
var script = "a = 55 + ABC()";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
Assert.AreEqual(
"Invalid identifier. Function name not previously defined. Line 1, Column 9",
interpreter.ErrorMessage);
}
public void ComplexSubtraction()
{
// Arrange
var script = "a = 10 - 2 - 4";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["a"];
Assert.AreEqual(4, variableValue.NumericValue);
}
public void UnknownRuntimeFunctionReference()
{
// Arrange
var script = "a = 55 + ur.ABC()";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
; Assert.AreEqual(
"Invalid runtime library name 'ur' specified on function call. Line 1, Column 9",
interpreter.ErrorMessage);
}
public void DivisionFirstThenMultiplication()
{
// Arrange
var script = "a = 100 / 2 * 10";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["a"];
Assert.AreEqual(500, variableValue.NumericValue);
}
public void SimpleMultiplication()
{
// Arrange
var script = "a = 5 * 6";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["a"];
Assert.AreEqual(30, variableValue.NumericValue);
}
public void AssignmentAndReferenceInExpression()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("a = 1");
scriptBuilder.AppendLine("b = a + 500");
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(scriptBuilder.ToString());
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["b"];
Assert.AreEqual(501, variableValue.NumericValue);
}
public void AssignmentAndSelfReassignment()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("a = 12345");
scriptBuilder.AppendLine("a = a");
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(scriptBuilder.ToString());
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["a"];
Assert.AreEqual(12345, variableValue.NumericValue);
}
public void FunctionDeclarationAfterCall()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("MyFunc()");
scriptBuilder.AppendLine("def MyFunc()");
scriptBuilder.AppendLine(" b = 15");
scriptBuilder.AppendLine("end");
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(scriptBuilder.ToString());
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["b"];
Assert.AreEqual(15.0, variableValue.NumericValue);
}
public void FunctionDeclarationAndCallThreeParameters()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("def MyFunc(value1, value2, value3)");
scriptBuilder.AppendLine(" b = value1 + value2 - value3");
scriptBuilder.AppendLine("end");
scriptBuilder.AppendLine("MyFunc(100, 200, 50)");
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(scriptBuilder.ToString());
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["b"];
Assert.AreEqual(250, variableValue.NumericValue);
}
public void Reverse()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("b = 0");
scriptBuilder.AppendLine("for a = 5 to 1 do");
scriptBuilder.AppendLine("b = b + a");
scriptBuilder.AppendLine("end");
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(scriptBuilder.ToString());
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["b"];
Assert.AreEqual(15, variableValue.NumericValue);
}
public void ThreeParameters()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("a = test.sum(2, 4, 6)");
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(scriptBuilder.ToString(), new List <ITurtleScriptRuntime>()
{
new SampleRuntime()
});
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["a"];
Assert.AreEqual(12, variableValue.NumericValue);
}
public void SimpleAssignmentTest()
{
// Arrange
var script = "a = 1";
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
Assert.AreEqual(1, interpreter.Variables.Count);
string variableName = interpreter.Variables.Keys.First();
TurtleScriptValue variableValue = interpreter.Variables[variableName];
Assert.AreEqual("a", variableName);
Assert.AreEqual(1, variableValue.NumericValue);
}
public void FunctionCallWrongNumberOfParameters()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("def MyFunc(a)");
scriptBuilder.AppendLine(" b = 15 * a");
scriptBuilder.AppendLine("end");
scriptBuilder.AppendLine("MyFunc(1,2,3)");
var script = scriptBuilder.ToString();
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
Assert.AreEqual(
"Invalid identifier. Function name not previously defined. Line 4, Column 0",
interpreter.ErrorMessage);
}
public void FunctionDeclarationAndCallOneParameter()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("def MyFunc(myparameter)");
scriptBuilder.AppendLine(" b = myparameter");
scriptBuilder.AppendLine(" myparameter = b * 2");
scriptBuilder.AppendLine("end");
scriptBuilder.AppendLine("MyFunc(10)");
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(scriptBuilder.ToString());
// Act
bool success = interpreter.Execute();
// Assert
Assert.IsTrue(success, interpreter.ErrorMessage);
TurtleScriptValue variableValue = interpreter.Variables["myparameter"];
Assert.AreEqual(20, variableValue.NumericValue);
}
public void ForLoopStartParameterMustBeNumeric()
{
// Arrange
StringBuilder scriptBuilder = new StringBuilder();
scriptBuilder.AppendLine("b = 0");
scriptBuilder.AppendLine("for a = (2>1) to 5 do");
scriptBuilder.AppendLine("b = b + a");
scriptBuilder.AppendLine("end");
var script = scriptBuilder.ToString();
TurtleScriptInterpreter interpreter = new TurtleScriptInterpreter(script);
// Act
bool success = interpreter.Execute();
// Assert
OutputResults(script, interpreter);
Assert.IsFalse(success);
Assert.AreEqual(
$"For loop starting value must be numeric. Line 2, Column 0",
interpreter.ErrorMessage);
}
private static void OutputResults(string script, TurtleScriptInterpreter interpreter)
{
Console.Write(
$"Script:{Environment.NewLine}{script}{Environment.NewLine}{Environment.NewLine}Error Message:{Environment.NewLine}{interpreter.ErrorMessage}");
}