public void GetIndexedStringOutOfBound()
{
Machine machine = new Machine();
IndexedExpression expression = new IndexedExpression(new ConstantExpression("foo"), new ConstantExpression(10));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNull(result);
}
public void GetIndexedStringNegativeIndexAsNil()
{
Machine machine = new Machine();
IndexedExpression expression = new IndexedExpression(new ConstantExpression("bar"), new ConstantExpression(-10));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNull(result);
}
public void EvaluateIndexedExpressionListInteger()
{
var list = new List <int>()
{
1, 2, 3
};
IndexedExpression expr = new IndexedExpression(new ConstantExpression(list), new ConstantExpression(1));
Assert.AreEqual(2, expr.Evaluate(null));
}
public void GetIndexedString()
{
Machine machine = new Machine();
IndexedExpression expression = new IndexedExpression(new ConstantExpression("foo"), new ConstantExpression(0));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNotNull(result);
Assert.AreEqual("f", result);
}
public void GetIndexedOutOfBandValue()
{
Machine machine = new Machine();
machine.ExecuteText("a = [1,2,3]");
IndexedExpression expression = new IndexedExpression(new NameExpression("a"), new ConstantExpression(10));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNull(result);
}
public void GetIndexedNegativeValue()
{
Machine machine = new Machine();
machine.ExecuteText("a = [1,2,3]");
IndexedExpression expression = new IndexedExpression(new NameExpression("a"), new ConstantExpression(-1));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNotNull(result);
Assert.AreEqual(3, result);
}
public void GetIndexedDictionaryEntryAsNil()
{
Machine machine = new Machine();
var hash = new DynamicHash();
hash[new Symbol("one")] = 1;
hash[new Symbol("two")] = 2;
IndexedExpression expression = new IndexedExpression(new ConstantExpression(hash), new ConstantExpression(new Symbol("three")));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNull(result);
}
public void EvaluateIndexedExpressionStringInteger()
{
IndexedExpression expr = new IndexedExpression(new ConstantExpression("foo"), new ConstantExpression(0));
Assert.AreEqual("f", expr.Evaluate(null));
}